Midland 13-898B User manual

FEDERAL COMMUNICATIONS COMMISSIONS REQUIREMENTS J
Youf new Midland 13-898B is a combination receiver-transmitter designed, buiU, and . С. C. type
acceptcd for licensed Class D operation on any of ihe 23 frequeneies designated as citizens band
channels by the ederal Communications Commission. You are required to read and understand
Part 95 of the . C. C. rule» and régulations prior to operation of this unit. Part 95 régulations are
available from the Superintendent of Documents, Government Printing Office, Washington D. C.
20402. You are also required to complété . C. C. form 505 and submit it to the . C. C. in order to
receive your license to operate this unit. . C. C. régulations will be violated if you transmit with this
unit prior to receipt of your license.
NOTE: The technical information, diagrams, and charts provided in this manuał are supplied for
the use of a qualified holder of a first or second class radiotéléphone license in servicing
this transceiver. It is the user’s responsibility to see that this unit is operating at all times in
accordance with the . C. C. Citizens Radio Service régulations.
If you install or service your own transceiver, do not attempt to make any transmitter
timing adjustment. Transmitter adjustments are prohibited by the . C. C. unless you hold
a first or second class radiotéléphone license or are in the presence of a person holding
such a license. A Citizens Band or Amateur license is not sufficient.
When service is performed by an authorized and licensed person, care must be taken in the
replacement of parts to use only authorized pans, in order not to void the type acceptance
of this model.
Midland Electronics Company hereby certifies that this unit has been
designed, manufactured and . C. C. type accepted in accordance with
Vol. 6, Part 95 of the current . C. C. rutes and régulations as of the date of
manufacture.
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Your 13-898B is a versatile, Professional quality tranlceiver and we strongly suggest that you read
this Owners Guide carefully before operation so that you tnay receive full benefit from its many
features.
WARNING: То prevent fire or shock hazard, do not expose this applianee to rain or moisture.
SINGLE SIDEBAND
SSB (Single Sideband) is relatively new in Citizens Band Communications but has been highly effective
in commercial amateur and military usage for many years. It is a superior means of wire'iess com
munications allowing transmissions of greater distances with a minimum amount of interférence and
noise.
There are two types of single sideband transmissions, USB (Upper Sideband) and LSB (Lower
Sideband). These might be described as half signais and due to the narrow band-width required, will
travel over greater distances at lower power than ordinary AM signais. igure 1 below illustrâtes
USB and LSB signais and the reference carrier Une.
Carrier reference
Figurę 1
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în the actual transmission o£ either USB or LSB, the carrier is removed. AU of the modulation for
a transmission is concentrated in either the Upper of Lower sideband. In the receiver, the carrier
is reconstrueted and the intelligence or modulated voice is then detected, amplified and converted
into an audible sound heard at the speaker.
AM (Amplitude Modulation) has been the standard method of Citizens Band B réception and
transmission for many years’and most of the existing transecivers being used today are AM. Techni-
cally, Amplitude Modulation is Double Sideband (DSB). In this method of operation, a carrier is
transmitted which is modulated or mterrupted by voice on both positive and negative sides as re-
presented by figure 2.
Figure 2
COMPATt ILlTY
The 13-898B is designed to be completely compatible with all current modes of Class D operation,
including single sideband, (upper or lower), double sideband, or conventional AM and is equipped
with separate transmit ter circuitry to provide high level AM (Amplitude Modulated) transmissions
and Ttue SSB (Single Sideband) transmissions. The receiver section is also capable of receiving AM
and SSB. The mode of operation for both receiver and transmitter sections is automatically selected
by the mode seleetor switch.
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OPERATION OF CONTROLS
DIGITAL CLOCK
TIME/ALARM SET KNOB
CLOCK FUNCTION KNOB
CHANNEL SELECT0R
MICROPHONE
CQNNECTOR
PUSH TOTALK
MICROPHONES
PHONE
JACK
SIGNAL METER
FINE TUNE CONTROL
CAU5WR SWITCH
POWER ON OFF SWITCH j
RE GAIN CONTROL
RF CAUBRATE KNOB
MODE SWITCH
TRANSMIT POWER/SWR METER
VOLUME CONTROL
ANL/BLANKER SWITCH
t ________ SQUELCH CONTROL
! CB/PA SWITCH
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ANTENNA CONNECTOR ______
TV I TRAP
PA JACK
AC POWER CONNECTOR
__ FUSE %A
DC POWER CONNECTOR
RECORD OUTPUT JACK-
EXTERNAL A U X IU A R Y INPU T JA C K
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OPERÄTING CONTROLS, CONNECTDRS AND THEIR FUNCTIONS
CHANNEL SELECTOR SWITCH
Controls both ttansmitter and receiver frequencies simultaneously and rnay be set to any of the 23 or
EX positions indicated. АИ necessary crystals are supplied for full 23 channel operation,
POWER PUSH SWITCH
Turm the power on or off (for AC operation O -ON-AUTO-ALARM switch must be placed in ON
position, refer to “DIGITAL CLOCK” in this manuał).
VOLUME
Controls the wund output from the speaker when receiving. The volume control does not affect
transmitting output.
RF GAIN
Controls R gain when receiving. To increase R gain (réception sensitivity) tum the knob to the
clockwise direction and to decrease counter-cloekwise direction.
SQUELCH
Quiets the receiver when signais are not being received and allows a quiet standby operation. It
fonctions only ih the receive mode and does not affect the receiver volume when signais are being
received. To adjust: When no signais are present, rotate the squelch control clockwise until the
receiver is quieted. Incoming signais will automatically release the squelch. The squelch circuit is
effective for both AM and SSB réception.
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RF CALIBRATE CONTROL
or usual operation place this control in the “R ” position (füll counterclockwise position).
This control, placed in the R position, switches in the “R meter” and your transmitting power
will be indicated on the R meter scalę (1 . . . . 10), while the push-to-talk switch is depressed.
Another use of this control is to check for SWR (Standing Wave Ratio) of your antenna system. See
“SWR Check” in this manuał.
MODE SWITCH (USB, USB & AM)
Controls the mode of operation for the transmitter and receiver simultaneously and allows sélection
of conventional AM operation or SSB operation on either upper or lower side band. In order to com-
municate. with another transceiver, you must use the same operating mode.
FINE TUNE
When receiving SSB signais, adjust the INE TUNE knob carefully and fix it at such a position where
the incoming signal сап be heard most clearly. Because of the characteristics of an SSB signal, it is
extremely important to adjust this control. With improper INE TUNING adjustment, the signal will
not be intelligible. The sound will be distorted. SSB tuning will become easy as you acquaint
yourself with the operation of this control. After adjusting it to clarify once, no adjustment is needed
if you stay on the same mode and channel, receiving the same station.
7

CAL SWR PUSH SWITCH
This switch will be used to check the SWR (Standing Wave Ratio) of your antenna system.
SWR CHECK
1. Connect your antenna system to the antenna conneetor on the rear panel.
2. Place the mode switch in the AM position and the CB/РА switch in the CB position.
3. Place the CAL/SWR switch in the released out position.
4. Press the push-to-talk button on the microphone and rotate the R -CALIBRATE knob so that
the SWR meter pointer reads maximum or SET. Release the push-to-talk switch.
5. Depress the CAL/SWR push switch and agam press the push-to-talk button. The SWR of your
antenna system will be indicated on the lower scale.
SWR readings of less than 1.5 are désirable, and usually obtainable with modern factory-made
anten nas in good condition.
Readings up to 2.5 may be acceptable, but readings over 3.5 should definitely be reduced by adjust-
ment of the antenna system.
NOTE: After completion of SWR CHECK, always place the R -CALIBRATE Knob in the R
(full со unter-clockwise position) position.
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ANL BLANKER PUSH SWITCH
With this switch placed in the released ANL position undesireable noise will be considerably reduced
in AM réception. When in the depressed BLANKER position annoying impulse noise will be blanked
out. This noise blanker circuit is effective for both AM and SSB réception.
»
CB РА PUSH SWITCH
This transceiver may also be used as a PA (Public address) amplifier. Connect a suitable 4 - 32 ohms
PA speaker to the “PA” jack on the rear panel. Depress CB-РА push switch and press the Push-to-talk
button on the microphone. or regulär 2-way communications, the switch must be placed in released
out [CB] position.
PHONE JACK
When a headphone is inserted, it autornatically disconnects. the internal speaker.
REC JACK
Both transmitting and receiving signais are supplied to the REC jack and can be recorded if a tape
recorder is connected to the jack. This jack is not affected by the setting of the Volume control
on the front panel. Therefore the record level must be adjusted by the record-level control of the tape
recorder connected.
EXJACK
This transceiver can be operated as a simple audio amplifier if you place the channel selector switch
in the “EX” position and connect an audio source to this EX jack provided on the rear panel. The
sound output from the speaker can be adjusted by tuming the front panel Volume control knob.
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PA JACK
This will be used for connection of PA speaker, see “CB-РА” push switch'’ in this manuał.
TVI TRAP COIL
Minimizes TV interférence. It is preset at the factory and usuatly does not require readjustment.
However if necessarÿ, it may be adjusted for minimum TV interférence.
ANTENNA LOADING COIL AND TRIMMER
These should be adjusted for maximum transmitter power output while transmitting with mode switch
placed in AM position, observing E power meter.
ANTENNA CONNECTOR
Used for antenna connection, matches PL-259 standard type.
DC POWER SUPPLY CONNECTOR
Used for connection of DC Power cord.
AC POWER SUPPLY CONNECTOR
Used for connection of AC power cord. When tho ЛС power cord is connected to the connecter the
DC power supply circuit is automatically eut off. Therefore always remove the AC cord when
operating the transceiver with DC power connected.
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S METER
This gives the relative strength of incoming signais when receiving.
DIGITAL CLOCK
When the AC power cord is inserted in the AC outlet, the clock starts operating regardless of whether
the POWER switch (on the front panel) is turnëd on or off.
То operate the transceiver on AC power, place the O -ON-AUTO-ALARM swtich in the ON position
and depress the POWER push switch on the front panel. To turn the power off simply depress the
POWER push switch again to release it or place the O -ON-AUTO-ALARM switch in the O
position.
NOTE: In case of DC operation the power of the transceiver is controlled by the POWER push
switch only regardless of the O -ON-AUTO-ALARM switch.
To turn on the transceiver automatically at the desired time, tune in a desired ehannel in advance
and adjust the volume control for proper Sound îevel, and set the O -ON-AUTO-ALARM switch
in the AUTO position, then set the time you desire by rotating the ALARM SET knob. At the sanie
time, depress the POWER PUSH SWITCH and the transceiver will automatically be switched on at
the preset time.
Alarm Set:
Turn the ALARM SET knob clockwise to the time you desire, and set the O -ON-AUTO-ALARM
switch to the ALARM position. Then, both the transceiver and alarm buzzer will be turned on
automatically at the preset time. If you want to activate only the buzzer tone, set the POWER
push switch to the released out positiort.
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Time Setting:
Push the TIME SET knob and adjust the time.
ANTENNĄ CONNECTION
Any Citizens Band beam, dipole, ground plane or vertical antenna may be used. A ground piane
type antenna will provide good coverage, and sińce it is essentially non-direetional, it is ideal in base
station to mobile operation. rom base station to base station or point-to-point operation a di-
rectional beam will give greater distance even under adverse conditions. The range or the transceiver
also dépends on the height of the antenna so whenever possible, select the highest location within
.C.C. limits.
Whatever the type of antenna selected, it is important that it be properly adjusted and matched and
the connecting transmission line be in good condition so as to avoid a high VSWR (voltage standing
wave ratio). A VSWR over 2.5 résulte in reduced radiated power and may cause instability and
damage to the final output stage of the transceiver. The VSWR may be measured with the built-in
SWR meter.
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OPERATiNG INSTRUCTIONS
1. Insert the MIC pług in the MIC Jack.
2. Make sure your antenna is securely connected to the ANT connecter.
3. Tum the Power on as stated in this manuał.
4. Set E GAIN to maximum tempo rar iły.
5. Tum the SQUELCH knob counter-clockwise fully.
6. Place the INE TUNE knob at center position.
7. Place the CB-РА push switch in the CB position.
8. Place the ANL-BLANKER push switch in either position.
9. Place the channel selector switch ł o a desired channel.
10. Place the mode selector switch in a desired mode position.
11. Adjust the VOLUME control for proper sound level.
12. То transmit press the Push-to-talk button on the microphone and to receive release the button.
IMPORTANT: Do not short circuit the antenna or do not try te transmit without an antenna
connected to the Antenna connecter on the rear panel. This may cause damage to
the output power transistors. Transmit only after carefully checking the installation
of connecter and coaxial cable.
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ERVICING YOUR TRANSCEIVER
The technical information, diagrams and charts provided in this manuał are suppüed for the use of
a qualified holder of a first or second dass radiotéléphone license in servicing this transceiver. It is
the users responsibility to see that this unit is operating at all times in accordance with the . C. C.
dtizens radio service régulations.
If you install your own transceiver, do not attempt to make any transmitter tuning adjustments.
Ail transmitter adjustments and servicing are prohibited by the , C. C. unless you hold a first or
second dass radiotéléphone license or are in the presence of a person holding such a license. A
Citizens Band or Amateur license is not sufficient.
When service is performed by an authbrized and licensed person, care must be taken in the replace
ment of parts to use only authorized parts, in order not to void the type acceptance of this unit.
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13 898 B SPECIFICATIONS
GENERAL
CSrcuitry:
requency Control:
Channels:
Modes of Operations:
Controls:
Jacks and Corrections:
Power Source:
Speaker:
Microphone:
PA Audio Output:
Size:
Weight:
Accessories:
Receiving system:
2 ICs, 40 Transistors, 1 ET, 63 Diodes
Crystals
23
AM, Lower Sideband-Upper Sideband
R gain control, Calibrate, Volume, Squelch, mode switch
ine Time, Channel selector, CAL/SWR switch, ANL-BLANKER
switch, CB-РА switch, Time/Alarm set switch.
Clock unction switch.
Microphone, Phone, Antenna, PA speaker, Recording output,
External speaker, AC and DC power connectors.
DC 13.8V, AC 220 240V 50 Hz.
3” dynamie, 16 ohms
Dynamic CB mike
More than 3 W
5” (H) x 16” (W) x 10” (D).
13 lbs
DC and AC Power cords, Microphone
Dual conversion superheterodyne
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Sensitivity:
Selectivity:
ine Tune:
Audio output power:
Squelch range:
Intermediate requency:
SSB TRANSMITTER
SSB Generation:
requency Response:
R Output Power:
Carrier Suppression:
Unwanted Sideband Suppression
Harmonie Suppression:
AM TRANSMITTER
Modulation:
R Output Power:
Harmonie Suppression:
More than 0.5jiV (S/>: lüdB)
More than 50 dB
More than ±800Hz
More than 3 W
O.öjuV ~ 100mV ( AM). 0.25mV ~ IOOjuV (SSB)
Ist, 11.275 MHz. 2nd 455 KHz
Balance Modulation
300 ~ 2700 Hz
12 Watts PEP
More than 40dB
More than 50dB
More than 50dB
High Level Calss В
Nominal 4.0 watts ( . С. C. Maximum)
More than 50dB
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17

ACK VIEW
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FRONT VIEW
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