Yaesu FR-101 User manual

FR-101
COMMUNICATIONS RECEIVER
•
GENERAL DESCRIPTION
The model FR-101 is a solid-state communications
receiver designed
to provide extreme flexibility that even
the most demanding amateur desires with provisions for
all mode reception
on twenty one 500 KHz amateur and
major shortwave broadcast bands from
160 through 2
meters. The versatile FR-I
01 receiver is capable of
t.ransceive or independent receive and transmit function
with the matching
FL - 101 transmitter or FT-101 E/ 277E
transceiver.
New, solid-state technology, with features such
as a
double-balanced mixer, offer unparalleled performance
and rejection
of cross-modulation and intermodulation
interference.
All circuits are composed of standard,
computor
type, plug-in modules, for reliable operation
and service• simplicity. A linear tuning, temperature
compensated VFO with I KHz frequency readability
is
incorporated. A .100 KHz/25 KHz crystal calibrator is
built-in. The FR-101 also includes fast attack /slow
release
AGC for SSB or AM and fast release for CW. lf
desired, the AGC can be completely disabled. A built-in
noise blanker with adjustable threshold control provides
excellent elimination
of most impulse type noise.
In addition to external VFO operation, a crystal
oscillator
is built-in for crystal-control operation of 4
channels of fixed frequency reception. The FR-I
01
includes a self-contained AC power supply · adjustable
from 100/
110/117 / 200 / 220 / 234 volt AC when the
primary power transformer winding
is appropriately
wired.
The
SP -101PB/277PB phone-patch and externa l. speaker
combination
is a useful accessory for amateur operation.

SPECIFICATIONS
Frequency Range:
160m 1.8 -
2.0MHz
80 3.5 -4.0
60
4.5-
5.0*
40 7.0-
7.5
31
9.5 -10.0*
25 11.5 -12.0*
20 14.0 -14.5
19 15 .0 - 15.5*
16 17.5 -
18 .0*
15
21.0 -21.5
13 21.5 -22.0*
11 25.5 -26.0*
CB 27.0 -27.5*
lOA 28.0 -28.5
lOB
28.5 -29.0
lOC
29.0 -29.5*
lOD 29.5 -29.9*
VHF6m
50.0 -52.0* 52.0 -54.0*
VHF2m
144 -146* 146 -148*
ti 1 4.
0- 4.5**
ti 2 5.
0-
5.2**
ti 3 7.
5-
9.0**
ti 4 22.0 -27.0**
Type
of Emission:
USB, LSB,
CW, AM, FM* or RTTY
Frequency Stability:
Within 100 Hz during any 30 minute period after
warm-up. Not more than 100
Hz with 10% line
voltage variation.
Calibration Accuracy:
I KHz maximum after 100 KHz calibration.
Backlash:
Not more than 50 Hz.
Antenna Impedance:
50 ohm unbalanced nominal.
Power Requirement:
100/110/117
/2 00/220 /234 volt AC 50/60 Hz or
13 .5 volt DC nominal.
Sensitivity:
SSB and CW ... 0 .3 µV for 10 dB Noise plus Signal
to Noise Ratio on 14 MHz.
AM ................. lµVon 14MHz.
FM ................. 12 dB SINAD
Selectivity:
CW·N* ...........0.6 KHz/6 dB, 1.5 KHz/60 dB
CW, SSB , RTTY, AM·N
............ 2.4 KHz /6 dB, 4 KHz/60 dB
AM·W* ............ 6 KHz /6 dB, 12 KHz/50 dB
FM* ................ 20 KHz /6 dB, 45 KHz/50 dB
Harmonic & Other Spurious Response:
Image Rejection ............... Better than 60
dB.
Internal Spurious Signal ... Below I µV equivalent
to antenna input.
Automatic Gain Control:
AGC threshold nominal I µV.
Selectable
AGC time constant, fast or slow.
Fast attack time 3 milli-second and slow attack
time 4 milli-second. Fast release time 0.5 second
and slow release time 2 seconds.
Audio Noise Level:
Not less than
40 dB below I watt.
Audio Output:
2 watts at 4 ohm impedance.
Audio Distortion:
Less than 10%at 2 watts output.
Dimensions:
340(W) x 153(H) x 285(D) mm.
Weight:
9
Kg.
*Options for FR-I0I Standard Type Receiver.
**Options for FR-101 Standard and Deluxe Type Receives.
SEMICONDUCTORS
Silicon TR:
FET:
IC:
18 x 2SC372Y, I x 2SC784R, 6 x 2SC735Y
Ix 2SA634
8 x 2SK19GR, 3 x 3SK35,
Ix 3SK40M
Ix AN214, Ix TA7061AP, 2 x CA .3053,
I x MC1496G,
Ix µPC-141C
Diode:
2 x IS2236,
1x1S2689, 5 x WZ090, I x WZ0109,
Ix 1S993, 6 x 1Sl555, 14 x 1Sl007,
4 x 1S188FM, 4 x V06B, 2 x TLR104

INSTALLATION
GENERAL
Carefully remove the FR-101 receiver from the carton
and examine it for any physical damage. Should any be
apparent, notify the carrier immediately, stating the
damage in detail. Save
the carton and packing materials
for future use.
LOCATION
In general, the location of the FR-101 is not critical,
however it
is recommended that excessively warm
locations be avoided. The FR-101 should be placed in a
location
that has adequate space to permit free air
circulation through
the cabinet opening.
POWER REQUIREMENT
Two prewired plugs are furnished
with the unit for AC
or DC voltage operation. The FR-101 is supplied with a
multi-voltage power transformer and can be
operated in
many areas
of the world where voltages may differ from
your local supply voltage. Therefore, before connecting
the AC cord to the power outlet, be sure that the voltage
marked on
the rear of the receiver agrees with the local
AC supply voltage.
CAUTION
PERMANENT DAMAGE WILL RESULT IF IM-
PROPER AC SUPPLY VOLTA<:;E IS APPLIED TO THE
RECEIVER.
The FR-101 will
operate satisfactorily from 12 volt,
negative ground
battery source by connecting the DC
power cord to the rear panel receptacle. The receiver
requires an average
of 0.5 amp. When making connec-
tions to
the battery, be certain that the RED lead is
connected to the positive (+) and the BLACK lead to the
negative (- ) terminals
of the battery. Reversed connec-
tion could
permanently damage the receiver circuitry.
ANTENNA AND GROUND
The FR-101
is designed for use with a resonant antenna
at the operating frequency and having an impedance of
50 to 75 ohms. This requirement is easily met by using a
center-fed dipole
antenna resonated to the receiving
frequency and fed with coaxial cable.
For amateur band
operation, any commercially designed antenna system
with an impedance of 50 to 75 ohms may be used.
Jf a
tuned, open-wire transmission line or a long wire
antenna
is used, a suitable antenna tuner must be used
between
the receiver and antenna. For more detailed
description on antennas, please refer
to "The ARRL
Antenna Hand Book" or "The Radio Amateur Hand
Book".
It is recommended to use the transmitting antenna when
the FR-101 is used with a transmitter or a transceiver.
Antenna change-over is accomplished by an antenna
relay provided in our transmitter
or transceiver.
The FR-101 should be connected t8 a good ground. The
ground lead should be connected to
the terminal marked
GND located
on the rear panel of the receiver.
SPEAKER
A 4
ohm speaker should be connected to the jack on the
rear of the chassis marked SP. One lead of the speaker
output is grounded to the chassis so that the one lead of
the speaker should be connected as illustrated in Figure
2. Our accessory speaker model SP-10l B/ 2778 or
SP-1 OlPB/277PB provides the correct impedance match
and matches in appearance with the FR-I 01.
HEADPHONE (
4 to 8 ohm impedance)
A headphone jack
is provided ·on the front panel for the
use
of a high sensitivity headphone. When a low
sensitivity headphone
is used, the 100 ohm resistor,
RI I, should
be shorted for adequate volume. (Ref. to
Fig.
I)
MUTE
The MUTE
jack on the rear of the chassis is wired so
that the receiver will operate only when the inner-
conductor of this jack is shorted to ground. When the
FR-101
is operated separately, and external muting is
not desired, the RCA plug with shorted inner and outer
conductors should be inserted into the MUTE jack. The
inner-conductor should, therefore, be connected to a
relay contact in
the transmitter, or the transceiver,
which
is normally open in transmit and grounded in
receive.
It is recommended that a shielded wire be used
for the interconnection between
the transmitter or
transceiver.
111
IOOV llOV 117V 200V 220V 234V
POWER TRANSFORMER PRIMARY CONNECTIONS

CONTROLS AND SWITCHES
The FR-101 has been specifically designed for ease of
operation and versatility. All controls have been pro-
perly adjusted at
the factory. Several panel controls and
switches are unusual in operation, and improper adjust-
ment may result in poor receiver performance. The
FRONT
(1) MAIN TUNING
The MAIN TUNING knob determines the frequency
which
you are receiving.
(2) BAND
The BAND switch is a twenty one position switch. The
tunable frequency range
of each band is listed in the
spe:::ifications on page 2.
(3) FUNCTION SWITCH
The FUNCTION switch consists of five push button
switches: POWER, STBY, NB , DIGIT and CALIB.
function
of various controls and switches is described in
the following section. Be certain that you understand
thoroughly the individual function
of each before
operating the receiver.
PANEL
POWER: When this switch is in the depressed position,
the power transformer primary
is connected
to the power line for AC operation. A
separate
DC cable is provided for connection
to a battery for DC operation.
STBY: With this switch in the depressed position, the
receiver
is muted.
NB : With this switch in the depressed position, the
Noise Blanker
is activated.
DIGIT: This switch
is used on the digital readout
receiver
to turn off the last digit if the flicker
is annoying.
CALIB: With this switch in the depressed position, the
100 KHz/25 KHz calibrator
is switched on.
A control is used for the calibration
of
-LL -.J :_:.,._ 1 -- - .l. 1 -· - ' -·

(4) MODE
The MODE switch is an eight position switch which
determines the appropriate detector and the filter in use.
In the
AM position, a diode detector is incorporated and
the carrier oscillator
is switched off. In the CW, RTTY,
and
SSB (USB & LSB) positions, a ring demodulator is
used as a detector with the appropriate carrier oscillator
turned on. In the
FM position, an (optional)FM
detector unit
is switched in. The appropriate filter is also
automatically selected by the MODE switch.
(5) AF-RF GAIN
The AF and RF GAIN control is a concentric double-
shaft potentiometer. The inner knob controls the audio
output level of the receiver and the outer lever knob
controls the
RF and IF gain of the receiver.
(6) SELECT
This switch provides the selection of an external VFO or
one of four crystal-controlled oscillator positions. Nor-
mal operation
of the FR-101 requires that the switch be
placed in the "INT" (Internal) position. When the switch
is in the "INT" position, a red lamp marked VFO is
lighted.
(7) AGC
This switch selects the AGC time constant. In the SLOW
position, the AGC time constant is 0.75 second and in
the FAST position, it is approximately 0.025 second. In
the
OFF position, AGC voltage is not generated. The
SLOW position is normally used with SSB and CW, and
the FAST position
is normally used for break-in CW and
RTTY. The
OFF position may be used on CW under
difficult reception conditions in conjunction with the
RF Gain control
(8) CLAR-TRANS
These controls use a concentric double-shaft potentiom-
eter. The CLAR (Clarifier) control -the inner knob -
provides a means
of varying the receiver frequency a few
KHz to either side
of the transmitting frequency when
the FR-101 is used as a companion receiver to the
FL-101 or FT-101E/277E. Thus it
is possible to set the
pitch
of the voice you are receiving to the most readable
point without affecting your transmitting frequency.
The CLAR control may be switched
off and the receiver
locked to the transmitting frequency
by setting the
CLAR control to the
OFF position. Normally, you will
want to keep the clarifier in the OFF position until the
initial contact
is made. The CLAR control may then be
used to zero-in and correct any drift on the received
signal. With the clarifier
ON position, a red lamp is
lighted.
The TRANS (Transceiver) control
is used to coincide the
receiving frequency with transmitting frequency when
the FR-101
is used in conjunction with the FL-101 or
FT-101E/277E. Slowly advance the MONITOR knob
of
the FR-101 to monitor the transmitted signal, then
adjust the TRANS control for the most natural voice
quality while transmitting.
(9) PRESELECTOR
The PRESELECTOR control permeability-tunes the
antenna and RF coils
in the receiver front-end. The scale
on this control
is calibrated with the wave length
markings showing the correct setting for various bands.
This control has two pointers -red and white. The red
pointer corresponds
to red band markings and the white
pointer to white band markings.
(10) MONITOR-SQUELCH
The MONITOR control is used to monitor the trans-
~itted signal when the FR-101 is used in transceive with
the FL-101 transmitter or FT-101E/277E transceiver.
The SQUELCH control adjusts the receiver squelch
threshold sensitivity in the
FM reception mode (when
the optional
FM detector unit is installed).
(11) VHF
The VHF switch selects the (optional) 6 meter and 2
meter VHF convertors. In normal reception, this switch
should be set to the HF position.
(12) RF ATT
The RF ATT (RF Attenuator) switch attenuates the
incoming signal
to prevent over-loading of the front-end
when
an extremely strong signal is present.
(13) PHONE-RECORD
PHONE and RECORD jacks are provided for private
listening and recording when desired. The attenuator
resistor, R11,
is connected to the PHONE jack in order
to use high sensitivity stereo headphones.
(14) S-METER
The S-METER indicates the relative signal strength of a
received signal.
It is calibrated in S-Units from S-1 to S-9
and in DB over S-9.
(15) BAND INDICATOR
The BAND INDICATOR automatically indicates the
band in use when the BAND switch
is set to the desired
band.
(16) DIAL LOCK
The DIAL LOCK locks the dial for the dial calibration.
Fig. I