Trio JR-599 User manual

'",
JR-589

~TR.IO
ALL BAND
SSB COMMUNICATIONS
~R-599
(I) The model JR-599 is classified into three
models: CUSTOM DELUXE, CUSTOM
SPECIAL (M)
and CUSTOM SPECIAL (X).
These models may be identified
by their name
plates attached on the front panels.
The major differences of these models are as
shown in the table below.
Model
IF Filter VHF Converter
CUSTOM DELUXE
SSB, FM
Not equipped
SSB, FM, CW, AM
144 MHz
CUSTOM SPECIAL (M)
converter
CUSTOM SPECIAL (X)
SSB, FM, CW, AM
50 &144 MHz
converter
RECEIVER
(2) Optional filters and crystal converters are made
available at dealers of our products for users to
modify' sub-models CUSTOM DELUXE and
CUSTOM
SPECIAL (M) into models CUSTOM
SPECIAL (X) by their own hands.
We are sure that users can entertain themselves
with a
smart and pleasantQSO after reading
this manual.
CONTENTS
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Special Features.................................................... 2
Circuit Description :........
.. 3
Controls and their Functions : . . . .
.. 10
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 15
Accessory Circuitry 22
Alignment :
.. 25
Maintenance 27
Schematic Diagram 29
Specifications ....................................................
.. 30
1

SPECIAL FEATURES
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1. All solid state circuits insure high quality
reception of the amateur bands allocated over a
freq
uency range from 1.8 to 29.7 MHz, the 50
and 144 MHz bands and WWV's 10 MHz
standard signal.
2. Field Effect Transistor (FET) used as RF
amplifier and mixer - a SIN, cross modulation
and image characteristics better than vacuum
tu be receivers characteristics.
3. IC
employed as IF amplifier provides lligh
stability
and gain. ....
4. VFO employing FET provides ahighly-stable,
low noise-factor
output.
5. Precision type double gear mechanism and
variable capacitor with linear characteristic
provided for main
tuning dial covering a25
kHz band with its one complete turn - a
receiving frequency readable
to the nearest 500
Hz.
6.
Fixed channel oscillators self-contained for 5
channels-spot
reception available for 5specific
frequencies.
7. Amplifier
type AGC circuit with time-constant
selector switch -distortionless reception of a
high
input signal, which is specifically useful
for SSB signal.
8.
100 and 25 kHz crystal controlled calibrator
circuits incorporated -precise frequency
calibration available for every
one complete
turn of main tuning .dial as well as for use of
this set as afrequency measuring set during
~SO.
9. Receiver incremental tuning (RIT) circuit in-
corporated provides means for fme adjustment
of receiving frequency or correction of a tuned
frequency without manipulation of main tun-
ing dial during a
combined transmitter-receiver
operation, as practised using a mated trans-
mitter.
10. Ring, linear
and ratio detectors equipped for
SSB,
AM and FM signal receptions respectively.
11. Crystal
and LC filters serving as IF filters for
SSB
and FM receptions respectively, are easily
selected as desired by means
of aMODE switch
depending on the condition of radio inter-
ference with aSELECTIVITY
switch placed in
AUTO position to interlock its electron switch
with the MODE switch. "An additional crystal
filter
incorporated in model CUSTOM SPE-
CIAL -for AM reception."
12. Beat frequency oscillator (BFO) operated
under control of crystals for both SSB and CW
receptions with an electronic switch provided
for selection
of an appropriate crystal.
13.
RF attenuator inserted in antenna input circuit
to provide means for adjustment of RF gain by
0, 20, 40 and 60 dB steps, as selected using a
selector switch - enables· model JR-599 to
serve as afield strength measuring set.
14.
Output transformerless (OTL) type audio
frequency circuit adopted -high power output
with low distortion factor available.
15.
Operable from an AC 100, 117, 220 or 240 V
source as well as aDC 12 Vsource, as selected
by means
of avoltage selector switch.
16. Provision
is made for mounting a 50 and 144
MHz crystal converters. [Model
CUST9M SPE-
CIAL (M) self-contains a144 MHz
converter
and Model CUSTOM SPECIAL (X) both 50
and 144 MHz converter.]
17. A
combined transmitter-receiver operation
available when operated in conjunction with
model TX-599 Transmitter, a combination
transmitter for model JR-599 Receiver.
18.
An extremely high-degree transmiHer-receiver
operation, or the so-called cross-operated VFO,
is practicable when a combination of model
JR-599 Receiver and Model TX-599 Trans-
mitter are operated with their VFOs placed
under control of the mated sets.
19.
Communication speaker "SP-55" made avail-
able to insure higher-quality reception.
2

The block diagram of model JR-599 Receiver is
as shown in Fig. 1. This receiver generally operates
on
the double superheterodyne system, in which
the receiving signals ranging from 1.8 to 29.7 MHz
including the WWV's 10 MHz standard signal are
converted by the 1st mixer
into the 1st IF signals
ranging from 8.295
to 8.895 MHz, which are
further converted by the 2nd mixer
into the 2nd
IF signal of 3.395 MHz.
For the receiving signals of 50 and 144 MHz
the receiver operates on the triple superheterodyne
system, in which the receiving signals are converted
initially
by acrystal converter into the 28 MHz
band signals before they are applied
to the RF unit.
1. RF Unit (UC1120J)
The signal entered from the antenna passes
through the protective diodes to the ANT coil
of
this RF unit selected in accordance with the
frequency band
to which the signal belongs. The
ANT coils are provided independently for all
receiving bands to insure the supreme performance
of the receiver set.
The signal passing through the ANT coil is
applied to RF amplifier Q1 comprising field effect
transistor
(FET) 3SK22, where it is amplified
enough.
An FET, featuring a
better cross modulation
characteristic and ahigh
output impedance com-
pared with ordinary transistors, enables the
RF coil
inserted succeeding to
the RF amplifier to provide
ahigher
Q.
The RF coils, similady to the ANT coils, are
provided independently for all receiving bands and
mounted as acoil pack on aprinted circuit board.
The amplified RF signal output ranging frbm
1.8
to 29.7 MHz is applied via the RF coil selected
corresponding
to the receiving band to gate 1 of 1st
mixer Q2, to which the 1st local oscillator voltage
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VR
POWER AMP
RING DET
Xn3393.5kHz
X,,3396.5 "
X,,3395.0 "
AM
1----l<:l-f-+-_-jD)l-E_T~ ~
l.-...,....--J L{>I-J FM
ANL
Block Diagram
Fig. 1
t-- __ ~BUFFER
r:::::::::::L .1. .L
~ =r----T
OSC 4.9-55MHz
5.5-4.9MHz
TO TX VFO
X, 29. 895MHz
X,36.895 "
X.37.395 "
X,37.995 "
X,,18.895 "
OSC OUTI
~I
~BUF~ER
I
OSC
...I. .J.
= ----- =
T T
HETERODYNE XTAL
(X,-X,,)
Xl -------
X,l O.695MHz
S'r X,12.395 "
X,15.859 "
X,22.895 "
r-----~
I 2M I
XTAL I
:CONVERTOR I
L ...1
r C>-r __ 6M __ ~-'J r
WXTAL U
ICONVERTORI
L ...J
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3

is injected through ga te 2. Thus, 1st mixer Q2
comprising
FET 3SK22 heterodynes its input
signal with Ist local oscillator outpu t to deliver the
1st IF signal ranging from 8.295 to 8.895 MHz.
Ist local oscillator Q3
is an overtone oscillator
employing
type 2SKl9 FET, to which avoltage
of 9V is supplied as the Bvoltage from the regulat-
ed
power supply.
The oscillation coils and crystals provided for
1
st local oscillator Q3 are incorporated in acoil
pack.
The output signal of 1st local oscillator Q3 is
taken out from the collector of oscillator transistor
and applied
to 1st mixer Q2. Part of the output is
fed through buffer Q4 comprising type 2SC460
transistor
to the remote terminal. Buffer Q4
lowers the
impedance of its input signal in order to
have
the output signal sent from the remote
terminal to the transmitter operating under a
combined transmitter-receiver basis serve as the
2nd
mixer signal.
The RF unit also incorporates part of the AGC
circuit
extending from AGC control transistor Q5
to the input side of RF amplifier Q2, the gain of
which being automatically controlled as follows:
Gates 1 and 2to RF amplifier Ql are kept
closed when no signal presents with avoltage of 4V
developing across Zener diode D3, normally based
from the source voltage, and
opened with the
output of AGC control transistor Q5 when asignal
presents
to control the gain of RF amplifier Q 1. In
this case,
FET used as RF amplifier Q1 provides a
better AGC characteristic compared with ordinary
transistors.
2. IF Unit (UC1212J)
The 1st IF signal delivered from 1st mixer Q2
in the RF unit is fed to band pass filter B.P.F. in
this
IF unit, where the unwanted frequency com-
ponent of the input signal is rejected. The B.P.F.
has apass
band of 600 kHz from 8.295 to 8.895
MHz. .
The 1 st IF signal is then applied to 2nd mixer
Ql consisting of an FET 3SK22, where it is
heterodyned with the output signal of variable
frequency oscillator (VFO)
to turn into the 2nd IF
signal. This signal
is fed once to the filter unit and
then conducted back to the IF unit, where it is
applied to 1 st IF amplifier ICQ2 (TA7045M). The
2nd IF signal ou tpu t of 1 st IF amplifier ICQ2 is
applied to 2nd IF amplifier Q3 (2SC460), where it
is further amplified.
The output signal of 2nd IF amplifier Q3 is fed
to three types of detector circuit: aring detector
comprising diodes D4 ~ D7, an AM detector
consisting of capacitor C14 (33 PF) and diode D3
(IN60) and a
ratio detector comprising adiscrimi-
nator transformer connected succeeding to limiter
Q8 (2SC460). Thus,
the ring detector detects the
SSB and
CW signals applied as its inputsignals into
an AF signal. The AM detector detects the AM
signal applied as its input signal into another AF
signal. While, the ratio detector ratio detects the
FM signal delivered from limiter Q8 (2SC460) into
the third AF signal.
Part
of 2nd IF amplifier Q3 is also applied via
capacitor
Cl3 to an AGC detector circuit consist-
ing
of diodes D1 and D2 (IN60). The detected
output from diode D1 is fed to an AGC amplifier
Q4, where
it is amplified and applied to transistor
Q5
(2SA495) serving as both an emitter follower
and a
current amplifier. Thus, transistor Q5
delivers two
outputs: One output, which is taken
out from the emitter side for the AGC, is fed to 1st
amplifier ICQ2
and 2nd amplifier Q3 and, via
resistor
R22 (l0 K.Q), to RF amplifier Q1 in the
RF unit. Part of the above output is also fed via
resistor R23
(220 K.Q) to squelch amplifier Q6.
While,
the other output, taken out from the
collector side, is directly supplied to the Smeter,
thereby deflecting the meter depending on the
AGC voltage
detected.
The time constant of the above mentioned
AGC circuit is determined by time constant capaci-
tor C3 inserted succeeding to AGC amplifier Q4
but outside the IF unit.
The rise-up of the AGC circuit depends on the
collector-emitter resistance of AGC amplifier Q4
when amplifier transistor
Q4 conducts and the
operation of the above-mentioned time constant
capacitor Q3.
When the AGC circuit
is started by the output
of 2nd IF amplifier Q3, AGC amplifier Q4 offers a
low impedance against time
constant capacitor C3
because of its current amplification characteristic
and, therefore,
conducts at once owing to the time
constant capacitor C3 discharged momentarily.

When the output of 2nd IF amplifier is cut off, on
the contrary, AGC amplifier Q4 increases its
impedance against time
constant capacitor C3,
thereby bringing itself
to the cut-off condition
slowly because of capacitor C3 charged gradually.
Thus,
it follows that AGC amplifier Q4 provides an
ideal quick-start slow-release characteristic for its
operation.
(Note that the above-mentioned AGC
operation applies to acase where the FUNCTION
switch
is placed in the (AGC) FAST position for
the quick AGC operation. For the (AGC) SLOW
position
of FUNCTION switch AGC amplifier Q4
provides an AGC characteristic just opposite to the
above characteristic because
of the discharge and
charge
of time constant capacitor C3 conducted
reversely.)
By
the way, the output of AGC transistor Q5
applied via resistor R23 to squelch amplifier Q6
(2SC733)
is amplified there and then applied to the
base
of buffer transistor Q7 (2SC733), thereby
controlling the base voltage with the input signal.
As aresult, buffer transistor Q7 controls
AF
amplifier Ql in the AF unit with its output to
perform asquelch
operation under control of the
inputsignal.
Buffer transistor Q7,
mentioned above, also
acts as
an emitter follower providing ahigher
impedance
to conduct the detected SSB, CW, AM
or FM signal with alower impedance to the AF
volume control outside the IF unit, as selected by
the MODE switch from the 2nd IF amplifier Q3
output.
3. Filter Unit (UC1213J)
The filter unit is inserted outside the IF unit
between
the output of 2nd mixer Q2 and the input
of 1st IF amplifier Q2 in the latter unit.
This
unit incorporates four fllters with diode
switches provided for
the SSB, CW, AM and FM
signals respectively. These filters are so designed
that an appropriate filter is selected by means of a
diode switch when the MODE switch
is placed in
the position for adesired receiving signal.
Now, suppose
that the MODE switch is placed
in
the SSB position for reception of the SSB
signal. This applies avoltage
of 13.8 V to the SSB
terminal for
the diode switch of filter XF-l. This
causes a
current to flow from the terminal through
resistor RI
(220 D) in the two directions to
resistors R2 (4.7
kD) and R3 (220 D). Thus, the
5
current passing resistor R2 flows as the forward
current through diode D1 (l N60) and resistor R21
(1 kD) to the earth. While, the current passing
resistor R3 flows as
the forward current through
resistor
R4 (4.7 kD), diode D2 (lN60) and resistor
R22
(1 kD) to the earth. Under the above condi-
tion apositive voltage
of approx. 2.3 V is built
up across resistors R21 and R22 to the earth. This
applies abackward voltage
to diodes D3 through
D8
(l N60). As aresult, diodes D1 and D2 turns
ON and diodes D3
through D8 turns OFF, thereby
allowing only
the SSB signal to pass through fllter
XF-l from 2nd mixer Q1 to 1st IF amplifier Q2.
The ratio
of the signals under the above ON and
OFF conditions of the diodes is approx. 70 dB.
The XF-l filter requires an external resistance
of 4.7 kD and an external capacitance of 33 pF.
Hence,
the filter is so designed that it employs the
DC resistors for diode switch as the external
resistance
of 4.7 kD and the internal capacitances
of the printed circuit board and coils L1 and L2 (l
mH), the capacitance of lead wires and other stray
capacitance as
the external capacitance of 33 pF.
Other filters for the CW, AM and FM signals
XF-2, XF-3 and aLC circuit are selected by their
diode switches
just in the same manner as describ-
ed above when
the MODE switch is placed in the
CW, AM and FM positions, respectively.
4. VFO Unit (UC0116J)
The VFO Unit incorporates avariable frequen-
cy oscillator circuit, which delivers
the output
frequencies varied over afrequency range of 600
kHz from 5.5 to 4.9 MHz to the 2nd mixer in
order to convert the l.st IF signals ranging from
8.895 to 8.295 MHz
into the 2nd IF signal of
3.395 MHz.
Asub-dial scale is calibrated for
the above
frequency range from graduation 0
to gradation
600 at intervals of 1kHz.
The variable frequency osicllator consists of
oscillator transistor Q1 (3SK22) arranged as a
modified Clapp socillator circuit and
operate quite
stably with
buffer transistor Q2 (2SKI9).
The output of variable frequency oscillator is
deliversed through buffer transistor Q2 and one
stage
of harmomic filter to the output circuit, a
Darlington circuit comprising amplifier transistors
Q3 and Q4, Hence, the
output circuit operate
stably against
the variation of its load.

The YFO unit also incorporates areceive
incremen tal tuning (RIT) circuit.
The RIT circuit is operated from the RIT
voltage generated in its generator circuit, which is
incorporated in the UC I0 I OJ Unit and actuated by
areceiver relay during
the reception under the
combined transmitter-receiver operation, and varies
the
YFO frequency regardless of the setting of
YFO SELECT dial. The RIT control on the front
panel provides means for controlling the above-
mentioned RIT voltage.
Note that the YFO Unit should never be
removed from its case or modified internally since
its adjustment needs ahigh degree of adjustment
technique.
5. Carrier (BFO) Unit (UC1214J)
The carrier unit incorporates abeat frequency
oscillator (BFO) circuit.
The BFO circuit, consisting mainly of oscillator
transistor Q2 (2SC460), buffer transistor Q2
(2SC460) and crystals X-I, X-2 and X-3 with a
diode switch consisting
of diodes DI through D4
(I SI555), inserts a beat or carrier frequency in the
ring detector for reception of the SSB or CW
signal.
Oscillator
transistor Q2 is the Pierce B-E circuit
and its
output frequencies are adjusted by means
of trimmer capaci tors TC I through TC3 inserted in
parallel with crystal X I
through X3 respectively.
Selection of acrystal for the BFO in reception
of the CW, LSB or USB signal is performed by the
above-mentioned diode switch as follows:
Suppose,
for example, that the MODE switch is
placed in the LSB position for reception of aLSB
signal. This applies a
power supply voltage of 13.8
Y
to the LSB terminal of the Carrier (BFO) Unit.
As aresult, aforward voltage
is applied from the
LSB terminal through resistor R4 (22 kS1) and
choke coil L4 (I mH) to diode D4 (I S1555), there-
by
conducting the diode since the diode offers alow
internal resistance because of the voltage applied.
This in
turn inserts crystal X3 connected in series
with
the diode via capacitor C6 (22 pF) across the
base and emitter of oscillator transistor Q I.
Hence, oscillator transistor Q I starts in oscillation
at the X3 crystal frequency, or 3393.5 kHz.
The beat frequency oscillator operates just in
the same manner as mentioned above for reception
of the USB or CW signal. But, its center frequency
3.395 MHz is shifted by 700 to 800 Hz for
reception of the CW signal because the center
frequency zero beats with the ou tput signal of 2nd
IF amplifier Q3 in this case owing to the fact that
the output signal' is continuous wave, and this
makes it difficult to receive the incoming frequen-
cy.
The above-mentioned shift of the YFO frequen-
cy
is accomplished by the diode switch as follows:
When
the MODE switch is placed in the CW
position, aDC voltage is applied from the CWR
terminal of this carrier unit via resistor RI (2.2
kS1) and choke coil Ll (I mH) to diode DI,
turning the diode ON. This grounds crystal X2
through the diode without any capacitor and,
therefore, insert the crystal directly across the base
and emi
tter of oscilla tor transistor QI. As aresult, .
oscillator
transistor Q2 starts in oscillation at a
frequency alittle lower than the crystal frequen-
cy.
The beat tone for the CW reception may be
adjusted through the use of trimmer capacitor
TC I, which provides means for varying the BFO
frequency by ±200 Hz.
The output of BFO oscillator transistor Q I is
applied via avoltage divider circuit comprising
capacitor CII (10 pF) and CI3 (22 pF) to buffer
transistor Q2. Buffer transistor Q2, acting as an
emitter follower, offers an output impedance as
low as a
bout 100 S1, thereby minimizing variation
of the output voltage and frequency.
6. 25 kHz /100 kHz Marker Unit (UC1505J)
The 25 kHz / 100 kHz marker unit incorpo-
rates a
marker signal generator circuit which
generates a
marker signal over a frequency range
from
3.5 to 28 MHz at intervals of 25 or 100 kHz
for calibration of the main tuning dial. Selection
of a 25 or 100 kHz marker signal may be
accomplished
by means of the FUNCTION switch.
The marker signal generator circuit consists
mainly
of four transistors Q I through Q4
(2SC373) and one 100 kHz crystal (HC/!3U).
Transistor Q 1, acting as an oscillator, oscillates
,«ith
the 1 00 kHz crystal at a frequency of 100
kHz. Trimmer capacitor TC I inserted in ,the
collector circuit of oscilla tor transistor Q I provides
means for fine
adjustment of the oscillator fre-
quency.
The output of oscillator transistor Q I is fed via
capacitor C4 (33 pF) to diode DI, through which
6

it is shaped into apulsed wavefonn occuring at a
period
of one fourth the 100 kHz and drives a
free-running multivibrator consisti.ng
of transistors
Q2 and Q3 at aperiod
of just 25 kHz since the
multivibrator has afree-running period
of about 25
kHz.
The output of the multivibrator is applied to
amplifier transistor Q4,
through which it is shaped
in the rectangular wavefonn and delivered to
RF
amplifier Q1 in the RF Unit.
When
the FUNCTION switch is placed in the
100 kHz CAL position
the emitter of transistor Q2
is grounded via the MS terminal of this unit,
turning transistor Q2 off. This disables the multi-
vibrator
and allows transistor Q3 to operate as a
mere amplifier. As aresult,
the 100 kHz pulsed
signal from
the oscillator transistor are conducted
as they are to amplifier transistor Q4 and, there-
fore,
to RF amplifier Q 1.
7. Regulated Power Supply Unit (UC1010J)
The regulated power supply unit provides
necessary operating voltages for the VFO, BFO and
1st local oscillator. Especially,
it supplies avoltage
with least variation to
the VFO (including the RIT
circuit) to prevent the VFO from changing its
oscillator frequency with variation
of the supply
voltage.
The unit consists mainly of four transistors Q1
(2SA497),
Q2 (2SC373), Q3 (2SC372) and Q4
(2SC372) and reference diode D1 (RD6A).
Transis
tor Q1 is the current con trol transistor,
which controls the
input current in accordance
with
an error voltage. Transistors Q2 and Q3 are
the error voltage amplifier transistors. Transistor
Q4 is the error voltage detector transistor and also
serves as
the temperature-characteristic cancelling
transistor for transistor Q3. Diode D1 (RD6A) is
the zener diode for producing areference voltage.
The error voltage detected by error voltage
detector Q4 is amplified through two amplifier
stages
of transistors Q2 and Q3. This allows the
regulated power supply unit to provide an ex-
tremely excellent voltage stability.
The voltage stability due to a temperature
change depends on the temperature characteristics
of the reference voltage diode and the error voltage
amplifIer circuit.
The reference voltage diode used is zener diode
RD6A, which has a
temperature coefficient of O.
7
While, the error voltage amplifier circuit consists ot
amplifier transistors Q2 and Q3 with transistor Q3
coupled
through differential connection to error
voltage detector diode Q4, and offers least varia-
tion
of its characteristic due to temperature change
because transistors Q3 and
Q4 cancel their tem-
perature characteristics.
Further, current control
t,dnsistor Q1 suffers from
almost no change of its
characteristic due
to temperature change because it
is asilicon PNP transistor.
In
addition, this regulated power supply unit is
so arranged that it protects current control transis-
tor Q1 against an excessive currentwhich might be
flowed through
the transistor when the output
terminal is shorted to earth, as encountered in
ordinary regulated
power supply circuits.
Resistors RIO
and R 11 and variable resistor
VR2 are provided to
produce necessary RIT
voltages to be fed to the RIT circuit in the VFO
unit.
8. AF Unit (UC1307J)
The AF unit incorporates an AF amplifier
circuit to
operate the speaker. This amplifier
circuit amplifies
the AF output delivered via
variable resistor
VR4 (l0 kn), or the AF volume
control, from squelch
buffer transistor Q7, which
is
connected through the MODE switch and detec-
tor circuits to 2nd IF amplifier transistor Q3.
The AF amplifier circuit, consisting mainly of
four amplifier transistor Q1 (2SC733), Q2
(2SC734), Q3 (2SD90) and
Q4 (2SB473), operates
as follows:
The AF signal from squelch buffer transistor
Q7
is conducted from the IN terminal of the unit
via capacitor
Cl to amplifier transistor Q 1, where
the signal is amplified on the voltage amplification
basis.
The output of amplifier transistor Ql is
amplified by amplifier transistor Q2 on both the
voltage and power amplification bases. The output
signal from amplifier transistor Q2 is applied to a
power amplifier consisting of transistors Q3 and
Q4, where it
is amplified on the power amplifica-
tion basis. Since transistors Q3 and
Q4 are coupled
through a
comprementary connection circuit to
the preceding circuit, they form an output trans-
formerless (OTL) circuit and, therefore, deliver
the
output signal with extremely small distortion
compared with that of the conventional power

transformer transformer coupled to the preceding
stage. Anegative voltage is fed
back from the joint
of transistors Q3 and Q4 via resistor RIO (I Ok.Q)
to the input side of transistor Q2, thereby not only
reducing
the disortion of output signal further but
lowering the output impedance with the resultant
improvement of damping factor. In addition, a
negative DC
current is fed back from the collector
of transistor Q4 to the emitter of transistor Q2
because
of transistors Q2, Q3 and Q4 connected in
series
and this reduces the variation of the voltage
at
the joint of transistors Q3 and Q4.
Variable resistor
VR I inserted in the collector
circuit of transistor Q2 is the semi-fixed control
VR Ifor adjustment of the supply current to
transistors Q3 and
Q4 wr.en no signal presents.
The variation of the above supply current is
compensated by thermister TH 1 (5T32) inserted in
parallel
with the semi-fixed control. Capacitor C7
(33
pF) is avoltage cancelling capacitor for the
negative feedback voltage to the collector side of
transistor Q2.
9. Fixed Channel Unit (UC0113J)
The fixed channel unit incorporates oscillator
transistor Q I arranged so as to form aPierce C-G
oscillator
circuit and emitter follower transistor Q2
acting as abuffer.
Oscillator
transistor Q I operates in conjunction
with afixed channel crystal selected by the CH
SELECT switch among those which are mounted
on a separate printed circuit board for reception of
the fixed channel signals.
The output of oscillator transistor Q2 is fed
through emitter follower Q2 to 2nd mixer Q2,
where
it is heterodyned with the fixed channel
.signal
under reception.
10. Crystal Converter
The TRIO model JR-599 SPECIAL (X) are sup-
plied with
the 50 MHz Crystal Converter (CC-69)
and the 144 MHz Crystal Converter (CC-29) to
provide means for reception of the 50 and 144
MHz VHF bands.
(A) 50 MHz Crystal Converter CC-69 (UC-2302J)
The 50 MHz crystal converter consists
mainly
of RF amplifier QI, mixer Q2 and two
local oscillators Q3 and Q4, as shown in the
circuit and block diagrams given in Fig. 2.
RF amplifier Q I and mixer Q2 employ an
FET 2SKI9 and FET 3SK22 respectively.
Local oscillators Q3
and Q4, each comprising
transistor 2SC785, provide local oscillator fre-
quencies
of 22 and 23.7 MHz for the mixer
operating with the Aand B channel signals,
respectively.
The input signal, i.e. the signal in areceiv-
ing frequency range from 50 to 51.7 MHz for
channel A or from 51.7 to 53.4 MHz for
channel B, is applied from the antenna to the
ANT input circuit of the converter, from which
it is fed through RF amplifier Q2 to mixer Q2.
Thus, mixer Q2 heterodynes the A channel
signal of 50 to 51.7 MHz with the 22 MHz
output of local oscillator Q3 into an HF signal
of 28 to 29.7 MHz. For the B channel signal of
51.7 to 53.4 MHz, the mixer heterodynes the
signal with the 23.7 MHz output of local
oscillator Q3
into an HF signal of 28 to 29.7
MHz. These HF signals are then fed to the
input circuit of the RF amplifier unit.
A
protective circuit comprising diodes D I
and D2 is
inserted in the ANT input circuit of
this converter for protection of RF amplifier
and mixer comprising an FET.
The RF amplifier stage is operated under
an AGC to improve the selectivity.
In
addition, avariable capacity capacitor is
inserted in each tuning circuit for the RF
amplifier and the mixer stages to vary the
resonance frequency of tuning circuit and
widen its substantial pass band simultaneously
with selection of the A or Bchannel for
improvement of the sensitivity and selectivity
of the converter (Utility model applied for).
(S) 144 MHz Crystal Converter CC-29 (UC2301J)
The 144 MHz crystal converter consisJs
mainly
of RF amplifier QI, mixer Q2, 2local
oscillators Q3
and Q4, and tripler Q5, as shown
ll1 the circuit and block diagrams given in Fig.
3.
RF amplifier Q I and mixer Q2 employ an
FET 2SK19 and FET 3SK22 respectively.
Local oscillators Q3
and Q4, each comprising
transistor 2SC535, provide local oscillator fre-
quencies
of I16 and I17.7 MHz for the mixer
operating with the Aand B channel signals,
respectively.
Tripler Q5, consisting of transis-
8

tor 2SC384, triples the frequency of each local
oscillator
output to obtain the above-
mentioned local oscillator frequencies.
The
input signal, i.e. the signal in areceiv-
ing frequency range from 144
to 145.7 MHz
for channel A or from 145.7 to 147.4 MHz for
channel
B, is applied from the antenna to the
ANT
input circuit of the converter, from which
it is fed through RF amplifier Q1 to mixer Q2.
Thus, mixer Q2 heterodynes the Achannel
signal
of 144 to 145.7 MHz with the 116 MHz
output of tripler Q3, or the Achannel local
oscillator frequency,
into an HF signal of 28 to
29.7 MHz.
For the Bchannel signal of 145.7
to 147.4 MHz, the mixer heterodynes the
signal with
the 117.7 MHz output oftripler
Q3, or the Bchannel local oscillator frequency,
into an HF signal of 28 to 29.7 MHz. These
HF signals are then fed to the
input circuit of
the RF amplifier unit.
Aprotective circuit compnsmg diodes D1
and D2
is inserted in the ANT input circuit of
this converter for protection of RF amplifier
and mixer, comprising an FET respectively.
The RF amplifier stage
is operated under
an AGC to improve the selectivity.
In addition, avariable capacitor diodes
is
inserted in each tuning circuit for the RF
amplifier and the mixer stages to vary the
resonance frequency
of tuning circuit and
widen its substantial pass band simultaneously
with selection
of the A or Bchannel for
improvement
of the sensitivity and selectivity
of the converter (Utility model applied for).
1l1111111111111ll11l111ll11ll1ll1ll111ll11ll111ll11111tllllllllllllllIIlIllIIIll1ll1llllllllllllllllllllllll1I111111111ll1l111111111ll111l1111ll1ll1ll1l1ll1ll1ll1l1ll1ll1ll111l1111ll111l1l1l11111111111l1ll1ll1l11111111l11l1ll1l1l11l1111111ll11l1111111111111111111111l111ll11ll11l1111111111111111111111111111111111Il1tllltltllllllll111111l
ACHANNEL
BCHANNEL
OUTPUT FREQUENCY
50MHz ~517MHz
51.7MHz·~ 53.4MHz
23.7MHz
(b) Block
.
ANT
Fig. 2
50 MHz
Crystal
Converter
(CC·69)
ACHANNEL
BCHANNEL
OUTPUT FREQUENCY
28MHz -29. 7MHz
144MHz ~ 145.7MHz
145.7MHz ~ 1474MHz
(bl Block
/
ANT
Fig. 3
144 MHz
Crystal
Converter
(CC·29)
IlrurnrffllOllllrlllllllllllllllllllllllllllllllllllllllllllllllllllllllll11Illlllllllllllltlllllllllllllllllllllllllllll1l11l11111111111111lUI111111111111111111111111111111111111111111111111111I11111111llllllllllltlllllllllllllllllllllllllllllllllllllllllll111111111I11111111111111111111111111111111111111111111111111111111111111111"
9

CONTROLS
AND
THEIR FUNCTIONS
Front Panel Controls (Photo 1)
(1) BAND (Main Band Selector Switch)
Main band selector switch BAND, a 10-
position
rotary switch provides means for
selection
of adesired receiving band among the
8bands allocated over afrequency range from
1.8
to 29.1 MHz the WWV's 10 MHz standard
signal
and an external band.
select either HF or VHF band as the operating
band. When this switch
is placed in the HF
position,
it makes the main band selector
switch effective
to select any band for recep-
tion as mentioned in item
(1) above. In other
positions, the switch inserts a50 or 144 MHz
crystal converter in the receiver circuit for
reception
of the 50 or 144 MHz band respec-
tively. (Note
that this switch is ineffective on
model JR-599 CUSTOM DELUXE provided
that the model is operated with no 50 or 144
MHz crystal converter mounted additionally.
This
is because said model is marketed without
the converter.)
(3) POWER (Power Switch)
The POWER switch provid power ON-OFF
control
to the receiver. In the ON position, it
applies power to the power supply circuit and
places the receiver in the runing condition.
(2) BAND (Auxiliary Band Selector Switch)
Auxiliary band selector switch BAND, a
5-position
rotary switch, provides means to
(4) RIT (Receiver Incremental Tuning Control)
Control RIT provides means for fine adjust-
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Photo 1 Front Panel
10

ment of arecelvmg frequency when this
receiver
is operated with model TX-599 Trans-
mitter as acombined transmitter-receiver.
If the user wantto operate this receiver on
the QSO basis, set up the receiver and model
TX-599 for acombined transmitter-receiver
operation.
Then, set the BAND switches and main
tuning dial on the receiver for the riominal
transmitting frequency
of adesired partner
station with the RIT switch placed in position
O. Tune the receiver to the actual transmitting
frequency
of the partner station and proceed
to the QSO operation.
If the receiving frequency shifts during the
QSO operation, re-tune the receiver to the
current receiving frequency by turning the RIT
control to and fro, instead of manipulating the
main tuning dial. Otherwise, the transmitting
frequency
of the local station will be shifted.
(5) PRESELECTOR (RF Amplifier Tuning controll
The PRESELECTOR switch is the tuning
control for the RF amplifier stage of this
receiver. This control should be adjusted until
the receiver provides the maximum sensitivity.
(6) SQUELCH (Squelch Control)
The SQUELCH control serves as the ON-
OFF control for both the squelch and RIT
operations.
That is, turning this control clock-
wise from
the OFF position intensity the
squelch control to the IF output until the
audio frequency circuit
is disabled for regenera-
tion of the incoming signal.
While, pulling the
knob of this control out
of its normal position turns the RIT switch off.
(7) (8) VFO SELECT - SELECTIVITY (Composite
VFO and Selectivity Selector Switch)
The VFO SELECT -SELECTIVITY con-
trol
is acomposite switch consisting of aVFO
and selectivity selector switches.
The VFO SELECT switch, a4-position
rotary switch forming the upper knob of the
VFO SELECT-SELECTIVITY switch, provides
means
to select adesired VFO under the
combined transmitter-receiver operation
of
models JR-599 and TX-599. Normally, this
switch should be
kept in the NORM position.
11
The SELECTIVITY switch, a5-position
rotary switch forming the lower knob of the
VFO SELECT-SENSITIVITY switch, provides
means
to select an adequate IF band depending
on the type of emission for the signal under
reception of the condition of radio inter-
ference. In
other words, this switch should be
placed
at aposition for which the speaker
delivers
the sound output which is most easy to
hear.
(9) (10) AF GAIN -RF ATT (Composite AF Gain-
RF Attenuator Selector Switch)
The AF GAIN - RF ATT control is a
composite switch consisting
of an AF GAIN
control and an
RF ATT switch.
The AF GAIN control, acontrol forming
the upper knob of the AF GAIN - RF ATT
switch,
is the volume control for the speaker
output. Turning this control clockwise in-
creases the volume of speaker output.
The RF ATT switch, a4-position rotary
switch forming the lower knob of the AF
GAIN -
RF ATT switch, provides means to
insert aresistance
attenuator of 60 dB at 20 dB
step in the input circuit of the RF amplifier
stage. Using this switch, therefore, model
JR-599 may be used to make measurent of a
field intensity.
(11) PHONES (Phone Jack)
The PHONES jack is provided for connec-
tion
of ahead phone plug.
(12) FUNCTION (Function Selector Switch)
The FUNCTION switch, a6-position rotary
switch, provides means to place model JR-599
under adesired functional condition such as a
stand-by operation, monitor, sJow and fast
responses and calibration, as obtained by turn-
ing the switch in the STABY, MONI, SLOW,
FAST, 100 kHz and
25 kHz positions respec-
tively.
(13) MODE (Receiver Mode Selector Switch)
The MODE switch, a6-position rotary
switch, provides means to select an adequate
mode
of the receiver operation depending on
the type of emission of the signal to be
received.

t
(a) CW (Continuous Wave)
Switch position CW is provided to
operate the receiver on an incoming con-
tinuous wave for reception of the Morse
telegraph codes.
(b) LSB (Lower Side Band)
Switch position LSB is provided to
opera te the receiver on an incoming LSB
signal for
reception of the 3.5 and 7.5 MHz
bands. This
is because it is an international
custom to use the LSB of SSB signal for
transmission and reception of the 3.5 and 7
MHz bands.
(c) USB
(Upper Sideband)
Switch position USB is provided to
operate the receiver on an incoming USB
signal for
reception of the bands above the
14 MHz band. This is because it is ageneral
rule
to use the USB of SSB signal for trans-
mission and
reception of the bands above
the 14 MHz
band.
Users should be careful enough not to
select a wrong sideband signal for reception
of aSSB band. Otherwise, the receiver fails
to damodulate the incoming signal at all.
(d) AM (Amplitude Modulation)
Switch position AM is provided to
operate the receiver on an incoming ampli-
tude-modulated signal for reception of the
radiotelephone speech.
If the receiver is operated on an incom-
ing SSB signal with the MODE switch
placed in this AM position by mistake, the
speaker mere numbles out its sound out-
pu 1. When operating the receiver with the
incoming signals belonging to the bands
below 7MHz band, therefore, never fail to
turn the MODE switch in the LSB posi-
tion.
For the signals belonging to the 14
MHz
band or higher, turn the switch in the
USB position.
(e) AM.N (Automatic Noise Suppression)
Switch position AM.N is provided to
suppress the annoying pulsed noises due to
the atomospherics, motor cars engine and
so on appealing in the sound output of
speaker during reception of an incoming
signal from an AM station.
(f) FM (Frequency Modulation)
This is the switch position provided to
operate the receiver on an incoming FM
signal
with the built-in 50 or 144 MHz
crystal converter inserted in the receiver
circui
1.
(14) S METER
The S METER indicates the level of the
signal under reception, as read on its scale in
dB.
The scale is so calibrated that the meter
reads 40 dB when it deflects to graduation S-9.
(15) Sub-dial Scale
The sub-dial scale is the disc scale mounted
below a rectangular small window at the upper
center section of front panel.
The scale bears the blue and orange gradua-
tions which, starting with the zero blue gradua-
tion, are calibrated alternately around the
circumferenece of the disc for a frequency
range from 0 to 600 MHz at intervals of 25
kHz.
This scale, being
mounted on the shaft of
the main tuning dial, shifts its position by one
graduation for everyone complete turn of the
tuning dial, or a frequency band covering 25
kHz.
(16) Main Dial Scale
The main dial scale is the disc scale tightly
kept in position against the bottom side of the
main tuning dial with spring pressure.
The scale bears the black and red gradua-
tions, which, starting with the zero black
graduations, are calibrated around the entire
circumference of the disc for frequency ranges
from 0
to 25 kHz and 25 to 50 kHz, the
former being marked with black figures and the
latter red figures. Hence, it provides means for
indicating the receiving frequency to which the
receiver tuned through the use of the main
tuning dial.
Because
of its constructional characteristic,
this scale may be calibrated quite easily by
12

shifting its zero graduation to a point for which
the receiver zero beats with the calibration
signal while depressing
and turning it with the
black knob incorporated to the main tuning
dial below the dial knob.
(17) Main Tuning Dial
The main tuning dial is the knob with the
main-dial and su b-dial scales in terlocked wi th
its shaft.
This dial provides means
to tune the
receiver circuit with adesired band signal
within a
band width of 600 kHz, for which it
shifts the main-dial and sub-dial scale gradua-
tions
by 25 kHz for everyone complete turn of
its knob.
Note
that this dial is stopped at a point
when rotated outside the 0 to 600 kHz range
of the su b-dial scale. Do not try to rotate the
dial beyond the above point. Otherwise, the
double gear mechanism for the dial may be
damaged.
Rear Panel
Controls and Terminals (Photo 2)
(1) HF ANT
This is the antenna terminals provided for
exclusive use
with HF antenna having an
impedance of 50 to 75n and providing a
receiving
band from 1.8 to 28 MHz.
(2) SPEAKER
This is the AF output terminals provided
for
connection of an external speaker. This
terminals have an
output impedance of 8n, but
speakers with voice coil of 4 - 16n are also
available.
(3) REMOTE
The REMOTE terminals are the connecting
terminals for a
transmitter to be operated in
combination with this receiver.
When this receiver
is to be operated with
model TX-599
Transmitter, connect between
the REMOTE terminals of the receiver and
IlllllllllllllllllllllltllllllllllllllllllllllllllllllllIlltlllll'III'llll"III"IIII"lllllllllllllll'lllllllIllllllllllllIllllllllllllllll'll,llllllllllllllllllllIltlllllllllllllllllllllllll.,rllllllllll"IIIIIllllll1111111111,"llllllllllll"lll'llllllllllllllltlllllll11111'llllllllllllllllllllllilllllll'lllllllllllllllll11111\111111
®®
•
Photo 2Rear Panel
11111111111111111111111111111111111111111111111111111111111Illllltlllllllllllllllllllllllllllllllllllllllllllllll1"lllIlllllllll'''IIIIII'IIIIIIIIIII'IIII'IIIIIIIIIII'111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111IIIIIIIIIIlUlIIIIIIIIIIIllllIIIIIIIlIIIIIIIIIIIIlIIII11111.
13

transmitter using the cord supplied with the
transmitter for the above purpose.
If the transmitter to be operated is the one
other than model TX-599, use the cord with
plug
connector supplied with the receiver to
connect between the transmitter and receiver.
(4) DC Input Terminals
This is the input terminals provided for
connection of a DC source to this receiver.
The requirement for the DC source is such
that the source should provide an output
voltage of 12 to 15 Vand a current capacity of
lA.
(5) AC - DC selector switch
This is aselector switch for selection of an
AC
or DC source. But, the switch is normally
fixed in
the AC position. When it is desired to
operate the receiver from aDC source, remove
the stopper from the switch, turn the switch in
the DC position, and fix it in that position by
means
of the stopper.
(6) VOLTAGE SELECTOR
This is aplug socket with abuilt-in IA fuse
mounted for connection of an AC input line.
The socket is provided with 100, I17, 220 and
240 volts tenninals at the output side for
selection
of an AC 100, I17, 220 or 240 volts
source.
(7) AC power cord
This AC power cord connects the receiver
to an AC 110, 117, 220 or 240 volts source
providing aline frequency
of 50 or 60 Hz when
plugged in
the AC line outlet available.
(8) VHF ANTENNA
This is the M type connector provided as
the antenna terminals for exclusive use with
the 50 MHz band antenna having an impedance
of 50 to 70 Q.
Note, however, that model JR-599 DE-
LUXE
is not provided with this connector
because it self-contains no 50 MHz crystal
coverter.
(9) VHF ANTENNA
This is the M type connector provided as
the antenna terminals for exclusive use with
the 144 MHz band antenna having an imped-
ance of 50 to 70 Q.
Note, however, that model JR-599 DE-
LUXE is
not furnished with this connector
because it self-contains no 144 MHz crystal
converter.
14

OPERATING .
INSTRUCTIONS
1. Accessories
The model JR-599 Receiver is supplied with
the accessories listed below.
Users are requested to check the contents of
JR-599's container against the list below when
unpacking the container.
l6-pin connector (plug) I
2-pin connector (plug) I
Spare legs 2
Operating manual I
2. Installation Place
Select aplace where dry air and less moisture
prevail and further the receiver installed is not
exposed to direct sun beams at the installation
place. Also, refrain from locating the receiver near
an object generating high heat, since the receiver is
a product using the transistors throughout its
circuit.
/
Photo 3 An Example of Antenna (For VHF)
15
3. Power Sou rce
This receiver is operable from an AC 100, 117,
220 and 240 V, 50 or 60 Hz source, as selected by
means of the VOLT AGE SELECTOR plug socket.
If the input voltage suffers from an error of
input voltage, for instance an error of more than
±1 0% to AC 100 V input, insert an appropriate
vol tage regulator ex ternally between the receiver
and the power line to adjust the input voltage to
100 volts.
Afuse having a current carrying capacity of IA
is enough for use as the power fuse.
4. Antenna
In order to have this receiver fully demonstra te
its performance, it is a prerequisite to operate the
receiver with an antenna providing better charac-
teristics.
Avertical or inverted - L type antenna may be
errected easily as asimple antenna which meets the
above requirement. Otherwise, it is recommen-
dable to use a transmitting antenna designed for an
amatuer radio station commonly as areceiving
antenna through provision of a selector swi tch and
this will enable the receiver to receive ahigh-
quality signal.
Use of a dipole or Vagi antenna is also
recommendable since such antenna is employed
widely among amatuer radio stations.
Mind to ground the receiver set without fail to
insure a stable reception and prevent dangers such
as short-circuiting.
Photo 3 shows an example of the antenna
opera ble wi th this receiver.
5. Speaker
Selects high-quality speaker with an input
impedance of 4 to 16 n for operation with this re-
ceiver and its is sure that users can entertain them-
selves with the high-quality sounds furnished by
the receiver. In this connection, the TRIO has al-
ready marketed models SP-50, SP-IO and SP-55
Speakers to respond the demand of users.
6. Receiving Procedure
First set up the model JR-599 for operation by
connecting the power line, the antenna and the
speaker to their associated terminals. Then, set the
front panel controls to the positions as shown

below. Also, refer to paragraph given under the
titles
"Front Panel Controls" and "Rear Panel
Controls".
When the model JR-599 is to be operated in
combination with a transmitter, never fail to
connect between the receiver and transmitter by
inserting
the connecting cord with 16-pin con-
nector supplied with the receiver in their REMOTE
terminals.
When all above-mentioned steps are completed,
turn the POWER switch to ON. This lights all pilot
lamps, which illuminate the dial surfaces
and meter
darkened higher to until they are loomed clearly
on the front panel, Here, carry out the following
steps:
(I) Slowly turn the main tuning dial until the
receiver is
tuned to the desired signal.
(2)
Adjust the PRESELECTOR control until the
receiver provides
the maximum gain.
(3)
Set the AF GAIN control at aposition for
which
the speaker gives a sound output at an
adequate volume.
(4) Place
the FUNCTION switch in either SLOW
or FAST position depending on the level
fluctuation of the signal under reception.
~5) Normally keep the RF ATT switch in the 0
dB position. Use switch positions 2,
40 and
60 dB when the receiver is used to measure
the field
strength quantitatively.
(6) Turn the SQUELCH control to a point where
the AF inpu tcircuitis just cut off electrical-
ly.
Setting the control at such acritical point
POWER:
BAND:
RF ATT:
AF GAIN:
MODE
FUNCTION:
PRESELECTOR:
RIT:
VFO SELECT:
SELECTIVITY:
SQUELCH:
AC-DC selector:
OFF
Adesired band and HF
odB
Center
Adesired mode of receiver
operation
FAST
Center
o
NORM
AUTO
OFF Bu t, depress the inner
knob against the panel face
to turn the RIT circuit ON.
AC
makes
it possible to turn on the AF input
circuit as soon as an input signal presents and,
therefore, is effective to eliminate the un-
wanted noise during reception of no signal.
(7) Finely
tune the receiver to the receiving signal
by
tuning the RIT control, which varies the
VFO frequency just alittle. Hence, it is
possible for the user to catch two different
signals momentarily by operating the RIT
control as follows: Pull the SQUELCH con-
trol
towards you to disable the RIT control.
Ca tch a certain incoming signal using the main
tuning dial. Depress the SQUELCH control
to restore the RIT control to its normal
condition. Then, catch another incoming
signal by
operating the RIT control. These
steps make it possible for the user to catch
the abovementioned signals momentarily by
pulling
and depressing the SQUELCH control
to turn the RIT control off and on.
(8)
Note that on model CUSTOM DELUXE the
SELECTIVITY switch inserts the SSB filter in
the receiver circuit in its all positions except-
ing
position 25 kHz, in which it inserts an LC
filter coil having apass
band of 25 kHz in the
circuit. This
LC filter coil is required for FM
reception of this receiver, but generally not
required for reception of HF bands.
(9)
The MODE switch should be placed in an
appropriate position depending on the type of
emission used in the partner station.
Bu t, it is ageneral practice to use the LSB
position for
the SSB signal lower than 7MHz
and the USB for the signal higher than 14
MHz.
Switch position AM.N is provided for
reception of the AM signal under extraordina-
ry heavy noises. Placing the MODE switch in
the AM.N position inserts anoise limiter in
the receiver circuit
at the output side of AM
detector, thereby limiting the noise level.
In the FM position, the switch inserts the FM
detector in the receiver circuit for reception
of the FM signal. In this case, however, place
the SELECTIVITY switch in either AUTO or
25 kHz
position because the FM signal gener-
ally features awider band width.
(10) Reading areceiving frequency.
The main tuning dial shifts areceiving fre-
quency by 25 kHz for everyone complete
turn. This shift of receiving frequency is
16

indicated on the main and sub tuning dial
scales.
The main tuning dial scale has the
black and red graduations calibrated over
frequency ranges
of 0 to 25 and 25 to 50 kHz
and
accompanying the figures marked in the
same color. While,
the subdial scale has the
blue and orange graduations calibrated alter-
nately from 0
to 600 at intervals of 25 kHz.
Now,
suppose that the main- and sub-dial
scales are set as shown in
the left-hand
diagram in Fig. 4.
And the receiving frequen-
cy
may be read off from the main and
sub-dial scales as follows:
First, observe the dial
setting for the receiving
frequency on the sub-dial scale. Read the
value
of the graduation of the scale set closest
to the actual setting at the right side with
respect to the center red vertical line. And
you will get areading of 100 kHz as read off
from the graduation marked in blue. Then,
read the value of the main-dial scale setting to
the red vertical index provided above the scale
between the LSB and USB indexes using the
graduation marked in black because the read-
ing
of the sub-dial setting is read using the
graduation marked in blue. And you will get
areading
of 25 kHz. Add the readings of the
main- and sub-dial settings and the sum gives
the
frequency of the receiving signal under
reception and, in the present example, is 120
kHz. While, the right-hand diagram shows
another example of the main- and sub-dial
scales
set to the 185 kHz. If the receiving
frequency band selected is the 14 MHz, then
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(a) 120kHz
Fig 4
(b) 185kHz
Slip Adjust flange and
sel .. 0" 10 Red Scale
./ Slip·Adjust flange ana
, set .. 0" or "25"
10 Red Scale.
(b) To calibrate when FUNCTION switch
is turned to the 25kHz.
Fig 5
(a) To calibrate when FUNCTION switch
is turned to the 100kHz
HlIIIII""11ll1U1Il1I1ll1ll1I1I1ll1 1I1IUIHIIUIlIIIlUlI'IIUlltIIIlIIIIIIIIIIIIUlIlIIIIIIIHIIIIIl1IIIIIilllllll,,,1I1111111111111111111111i1l11l11l11lIllllllllljlIUIIIIIIIIII1IIIIIIIIlllllllllllllllllllllllllllllllll1111111111111111UIIIIIIIIIIIIIIIIIIIIIII11l11I1I11I1I1111I1ll11l11l11l1I111I11l11I1I11l11l11I11l11l111II111l11I111I1I11I1l111111111111111111111111111111111111111111111111111111111111111111111111
17

the receiver may be operated more convenient-
ly in the following steps compared with the
model JR-599 Receiver CUSTOM DELUX.
(I) When the receiver is operated with the
SELECTIVITY switch placed in the
AUTO position, it can be operated with
an appropriate fil ter merely by placing
the MODE switch in adesired position.
In other words, afilter having the band
width corresponding to the position of
the MODE switch is inserted in the
receiver circuit as follows when the
MODE switch is placed in adesired
position.
(2) When the receiver is operated with the
MODE switch placed in a certain posi-
tion, it can be operated with any desired
band merely by swi tching the SELEC-
TIVITY switch from the AUTO to a
desired position.
(3) When the receiver is operated with the
SELECTIVITY switch placed in the CW
position, the CW filter is automatically
inserted in the receiver circuit by merely
switching the MODE switch to the CW
position. If the SELECTIVITY switch is
placed in the 0.5 kHz position, the CW
filter can be inserted in the receiver
circuit regardless of the position of
MODE switch.
(4) To receive any incoming signal in the 50
MHz band, proceed as follows:
With the auxiliary BAND switch placed
in the 50 MHz position, place the main
BAND switch in the 28.0 position and
the receiver is set up for reception of the
incoming signal in a frequency band
from 50.0 to 50.6 MHz. Turning the
main BAND switch to the 28.5 position
causes the receiver to set up itself for
reception of the signal in a frequency
band from 50.5 to 51.1 MHz. Thus,
turning the main and or auxiliary BAND
it follows that the frequencies under recep-
tion are 14.120 and 14.185 MHz respective-
ly. Note, however, that the main-dial scale
reading should be taken using the graduation
marked in red provided that the auxiliary-dial
scale reading is taken using the graduation
marked in orange. The vertical red index used
in the above example is provided for reading
the receiving frequencies in the CW, AM and
FM receptions. For the SSB reception, use
the main-dial scale in connection with the
right-hand USB index for reception of the
USB signal and the left-hand LSB index for
reception of the LSB signal.
(11) To calibrate the main-dial scale, proceed as
follows using the calibration signals provided
by the calibrator circuits self-contained. Set
the FUNCTION switch to the 100 kHz CAL
position and the MODE switch to the CW
position. Slowly turn the main tuning dial
and you will hear the beat tones appearing
and then dying away through the speaker as
the dial is turned clockwise. Find a setting of
the scale against the vertical red index where
the receiver zero beats precisely. Depress the
main-dial scale using the black knob assembl-
ed around the main tuning dial and turn the
scale un til its zero graduation is precisely set
to the setting and this completes the calibra-
tion of the scale to the 100 kHz calibration
signal.
Here, switch the MODE switch to the 25 kHz
CAL position and you will hear a zero beat
tone at intervals of 25 kHz when the main-
dial is turned. Depress the main-dial scale and
set the zero graduation of the scale to the
setting of a zero beat occurring closest to the
signal under reception. Read the values of the
main- and sub-dial scales under the above
condition and you will find the frequency of
an unknown signal under reception. Fig. 5
. illustrates the procedure for calibration of the
main-dial scale.
(A) Operating instruction for Model JR-599
CUSTOM SPECIAL
The model JR-599 Receiver CUSTOM
SPECIAL (X) self-contains a CW and AM fil-
ters and a 50 and 144 MHz converters. Hence,
MODE switch
Position
CW
LSB, USB
AM, AM.N
FM
Band width
0.5 kHz
2.5 kHz
5 kHz
25 kHz
Filter selected
CW filter
SSB filter
AM filter
18

switches further sets up the receiver for
reception of the signals in the 50 MHz
band as listed below:
28.0
28.5
29.1
28.0
·28.5
29.1
(5)
To receive any incoming signal in the
144 MHz band, for reception of the 50
MHz band above
except BAND switch
should be placed in
the 144 Aand B
positions.
The switch positions and the
receiving
frequency range in this case are
as shown below.
It should be noted that an antenna with
better characteristics is required for the
receiver
to such extent that the receiver
sensitivity depends solely on the
antenna
when the receiver is operated for recep-
tion of the 50 MHz band. For this
reason,
the model JR-599 CUSTOM
SPECIAL (X) should be
connected to the
antenna installed specifically for recep-
tion of the 50 MHz band. Also, use the
antenna connector on the rear panel
marked 50 MHz for connection of the
antenna lead wire.
28.0
28.5
29.1
28.0
28.5
29.1
Switch position
Main BAND Auxiliary
BAND
50 A
50 A
50 A
50 B
50 B
50 B
Switch position
Main BAND Auxiliary
BAND
144 A
144A
144A
144 B
144 B
144 B
Receiving frequency
range
50.0 to 50.6 MHz
50.5t05LIMHz
51.1t051.7MHz
51.7 to 52.3 MHz
52.2 to 52.8 MHz
52.8 to 53.4 MHz
Receiving frequency
range
144.0
to 144.6 MHz
144.5
to 145.1 MHz
145.1
to 145.7 MHz
145.7
to 146.3 MHz
146.2
to 146.8 MHz
146.8
to 147.4 MHz
Note that the receiver needs an antenna
with better characteristic for reception
of the 144 MHz as in case of the 50 MHz
band reception.
For this reason, the
model JR-599 CUSTOM SPECIAL (X)
should be
connected to the antenna
installed specifically for reception of the
144 MHz band. Also, use
the antenna
connector on the rear panel marked 144
MHz for
connection of the antenna lead
wire.
(B) Combined transmitter-receiver operation using
acombination of models JR-599 and TX-599
The model JR-599 Receiver can be
operated with the model TX-599 Transmitter
as a combined transmitter-receiver when the
receiver
and transmitter are installed together
and set up as described below.
(1)
Connect between the REMOTE termi-
nals
on the models TX-599 and JR-599
as shown in Fig. 6using the connecting
cable with 16-pin connector supplied
with the model TX-599.
Connect the antenna to the antenna
terminal of the transmitter. Also, con-
nect the RX-ANT terminal on the trans-
mitter to the antenna terminal of Model
JR-599 with connecting cable. Then,
throw the switch on the rear receiver
panel
into the TRCV position. The
above completes the set-up of the
models TX-599
and JR-599 for acom-
bined transmitter-receiver operation.
(2)
As for the operation of the model
TX-599
under acombined transmitter-
receiver
operation, refer to the operating
manual
for model TX-599.
When the VFO SELECT switch
on
model JR-599 is in the NORM position,
models
JR-599 and TX-599 operate
separately even though they are set up
for
the combined transmitter-receiver
operation.
19
As seen from the above figures, the
model
JR-599 CUSTOM SPECIAL (X) is
capable of covering afrequency range of
3.4 MHz for reception of the 144 MHz
band.
When models
JR-599 and TX-599 set up
for
the combined transmitter-receiver
operation are operated with the VFO
SELECT switch
on model JR-599 set at
the RX position, the VFO in model