Midland I3-795 User manual

ülDLAND
COM IVIUfSIIC/VTIО ISJS COM PANY

Your new Midland 13-795 is a combination receiver-transmitter designed and
citizens band channels by the ederal Communications Commission. You are
required to read and understand Part 95 of the .C.C. rules and régulations prior
to operation of this unit. Part 95 régulations are available for $2.00 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. régula
tions will be violated if you transmit with this unit prior to receipt of your license.
Your 13-795 is a versatile, Professional quality transceiver and we strongly sug-
gest that you read this Owner’s Guide carefully before operation so that you may
receive full benefit from its many features.
Operating range will vary from 1 to 10 miles, depending on terrain, interférence,
climatic conditions, and the other transceiver used. Using a mobile or base station
antenna will increase range. Generally, operating range is greater in open country
than in an urban center. Battery condition also affects range and fresh batteries
will provide for better range than weak ones.
built for licensed Class'D* operation on any of the 23 frequencies designed as
BATTERY/R F PC
S-METER CONDI
INDICATOR
CHANNEL SELE
EXTERNAL
MICROPHON
JACK
PUSH-TO-T/3
BAR
------ TELESCOPING ANTENNA
------- VARIABLE S UELCH
CONTROL
EXTERNAL POWER JACK
HI-LO POWER SWITCH
SPEAKER/MIKE
.CHARGE JACK
VOLUME/ON-OFF
CONTROL
ANTENNA JACK
EXTERNAL
IGURE-1
EXTERN AL SPEAKER JACK

CHANNEL SELECTOR
Controls both transmitter and receiver frequencies simultaneously and may be
set to any of the 23 positions indicated. All necessary crystals are supplied for
full 23 channel operation.
VOLUME/ON-OFF
Turns the set on and Controls the sound output from the speaker when receiving.
The volume control does not affect transmitting output.
Quiets the receiver when signais are not being received and allows a quiet standby
operation. It functions only in 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. Careful adjustment is necessary as settings
too far to the right will not allow weaker signais to release the squelch.
HI-LO POWER SWITCH
This Controls the transmitter-output power. This is an important control and when
properly used will greatly extend battery life. or short or medium range com
munications, set this switch to low. In this position, the power input is reduced
to 2 watts. or long range use or when maximum power is needed to get through
interférence, move this switch to high position.
PUSH-TO-TALK BAR
This Controls both the transmitter and the receiver. To transmit, press and hold
the bar, to receive, release it.
EXTERNAL ANTENNA JACK
External antennas, either mobile or base may be plugged into this jack and will
increase the units range. The built-in antenna is not extended when an external
antenna is being used.

CHARGE JACK Y
Permits recharging of rechargable batteries without removal from the case.
EXTERNAL POWER JACK
Permits Use of an external 15 volts DC supply.
(SEE MOBILE AND BASE OPERATION)
EXTERNAL SPEAKER JACK
Permits the use of an external 8 ohm speaker. When the external speaker is
plugged in, the speaker in the set is disconnected in the receive position. The
built in speaker/mike will still function normally in the transmit position.
In the transmit position, it measures the relative output power of your transmitter.
In the receive position, it measures the relative strength of incoming signais and
the condition of the batteries. (See figures 2 and 3)
BATTERY/R POWER/S-METER CONDITION INDICATOR
AVERAGE INCOMING SIGNAL -------- 1 i ------- NORMAL BATTERY VOLTAGE
BATTERY CONDITION
SIGNAL STRENGTH
POWER
H
LO
IGURE-2

BATTERY INSTALLATION À
When replacing batteries, turn power switch off.
Note: This transceiver opérâtes from 15 volts DC and may be powered by 12
1.25 volt nickel cadmium rechargable cells or 10 1.5 volt regulär "AA"
type penlight cells. When using penlight cells, 2 dummy batteries (sup-
plied) must be used.
Due to the high current drain of this unit, nickel cadmium or alkaline cells are
recommended.
To replace batteries, loosen the two large slotted screws located on the bottom
and back of the case. (See figure 6)
Carefully disconnect the battery power plug.
Refer to figure 4 for regulär penlight cell installation. Note: Dummy batteries
must be placed as shown.
Refer to figure 5 for nickel cadmium cell installation.
Connect power plug and replace cabinet back.
BATTERY INSTALLATION FOR REGULAR PENLIGHT CELLS
1. USE 10 HEAVY-DUTY VA VOLT "AA” ALKALINE BATTERIES AND 2 DUMMY BATTERIES
PLACE 2 DUMMY BATTERIES HERE 12 SERIES-CONNECTED BATTERY CELLS
BATTERY
POWER PLUG
(CONNECTS TO POWER SOCKET IN MAIN UNIT) IGURE-4

BATTERY INSTALLATION FOR NICKEL-CADMIUM BATTERIES
1. USE 12 NICKEL-CADMIUM RECHARGEABLE BATTERIES (1.25 VOLTS EACH)
12 SERIES-CONNECTED BATTERY CELLS
(EACH TUBE HOUSES 2 CELLS)
1. Extend the antenna to its füll length or connect an external antenna.
NOTE: Transmitting without any antenna may damage the output transistors.
2. Turn the volume/on-off switch to the on position.
3. Check the meter to be sure your batteries are good.
4. Set the channel selector to the desired channel.
5. Adjust the volume and squelch Controls.
6. To transmit, press and hold the push-to-talk bar and talk into the speaker/mike
grill. Use a normal tone of voice and hold the unit about 2 to 3 inches from
your mouth. To receive, release the push-to-talk bar.
or best transmission and réception when using the built in antenna, it should be
held in a vertical position.
MOBILE OPERATION
This unit may be used in a vehicle, drawing its power from the car or boat battery
system and using a mobile antenna installed on the vehicle. However, this unit is
designed to operate from 15 volts DC and slightly reduced performance may be
noticed when using a 12 volt supply system.
BASE STATION OPERATION
This unit may also be used as a base station with a suitable base station antenna.

SPECIFICATIONS
Circuit system
Semi-conductor
Frequency
Modulation
Operation
Antenna
Speaker-Microphone
Controls
External jack
Power source
Cabinet
Dimensions
Weight
Receiving section
Transmitting section
Accessories included
Receiving section
Crystal controlled dual conversion superheterodyne with RF
amplifier füll variable squelch and noise limitter.
Transmitting section
Crystal controlled oscillation, collector modulation system.
16 Transistor plus 1 Transistor in squelch circuit.
1 Zener Diode
5 Diodes
1 Thermistor
1 Varistor
27 MHz citizen band synthesized system
23 Channels
AM - High Level
Push-to-talk system
Telescopic, 10 section, 69"
2%" Dynanic speaker, 100 ohm
Channel selector switch, full variable squelch, OFF-ON volume
control, battery saving switch.
External power jack, Charger jack, External speaker jack, External
mic jack, External antenna jack.
15 volts DC
Ali metal with diecast chrome grille
10-3/8" High x 3-3/8" Wide x 2-3/8" Deep.
3-3/4 pounds.
Sensitivity 1 juV at 10dB S/N
Squelch sensitivity 1 juV Nominal
Intermediate frequency
Ist 5.995MHz/6.015/6.025/6.035
2nd 455 KHz
Audio output 0.5 watt
Power input 5 watt
Frequency tolérance ± 0.005%
Leather case, carryîng strap, two(2) dummy batteries and instruc
tion booklet.

SERVICE INFORMATION
The technical information, diagrams, and charts provided in this manuał are sup-
plied 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. Citizens Radio
Service régulations.
If you install or service your own transceiver, do not attempt to make any
transmitter tuning adjustment. Transmitter adjustments 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.
MIDLAND COMMUNICATIONS COMPANY HEREBY
CERTI IES THAT THIS UNIT HAS BEEN DESIGNED
AND MANU ACTURED IN ACCORDANCE WITH VOL. 6,
PART 95 O THE CURRENT CC RULES AND REGULATIONS
AS O THE DATE O MANU ACTURE.
DISASSEMBLY INSTRUCTIONS
To remove the back cover, loosen the two large slotted screws located on the
bottom and back of the cabinet (Refer to@and(d), igure 6).
To remove the front panel, loosen the set screws in the volume, squelch, and
channel selector knobs and remove these knobs. Then remove two phillips head
screws from each side of the cabinet. (Refer to@ and®, igure 6)
@ REMOVE THESE
TWO PHILLIPS HEAD ®REM O VE THESE
TWO PHILLIPS HEAD

ADJUSTMENT GUIDE
Caution: The antenna must be fully extended, or a suitable load applied when
transmitting or the output transistors may be damaged.
Transmitting section
1. Set the channel selector to channel 13.
2. Connect an R power meter to the external antenna jack. (Antenna with-
drawn).
3. Connect a suitable, metered, 15 volt power supply to the external power jack.
4. Press the push-to-talk switch and adjust the transmitting coil only, for maxi
mum R output. (Note current drain from power supply)
5. Disconnect the R power meter and fully extend the antenna.
6. Press the push-to-talk switch and adjust the antenna loading coil for the same
power supply current drain as obtained in step 4.
Receiving Section
1. Adjust a signal generator to 455 K Iz with 30% modulation at 1 KHz.
Adjust the 4 transformers of the second I stage for maximum indication on
the front panel output meter.
2. Set the channel selector to channel 11. and using another transceiver or trans-
mitter as a signal source, adjust the antenna coil, the R coil, and the 2 trans
formers of the first I stage for maximum indication on the output meter.

FRE UENCY SYNTHESIZER CRYSTAL Г ■ , - ■ ■ ■■ — — 4
COMBINATION LIST
(A) Group 6 pcs. (B) Group 4 pcs. (C) Group 4 pcs.
(Transmitting) (Receiving)
a. 33.000 MHz a' :6.035 MHz a" :6.490 MHz
b. 33.050 MHz b' :6.025 MHz b" :6.480 MHz
c. 33.100/ MHz c' :6.015 MHz c” :6.470 MHz
d. 33.150 MHz d' :5.995 MHz d" :6.450 MHz
e. 33.200 MHz
f. 33.250 MHz
CHANNEL FRE UENCY(MHz) Combination Combination
(Transmit) (Receive)
1. 26.965 a-a' a-a"
2. 26.975 a-b' a-b"
3. 26.985 a-c' a-c"
4. 27.005 a-d' a-d"
5. 27.015 b-a' b-a"
6. 27.025 b-b' b-b"
7. 27.035 b-c' b-c"
8. 27.055 b-d' b-d"
9. 27.065 c-a' c-a"
10.27.075 c-b' c-b"
11. 27.085 c-c' c-c"
12. 27.105 c-d' c-d"
13. 27.115 d-a' d-a"
14. 27.125 d-b' d-b"
15. 27.135 d-c' d-c"
16. 27.155 d-d' d-d"
17. 27.165 e-a' e-a"
18. 27.175 e-b' e-b"
19. 27.185 e-c' e-c"
20. 27.205 e-d' e-d"
21. 27.215 f-a' f-a"
22. 27.225 f-b' f-b"
23. 27.255 f-d' f-d"