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1

To the Owners . Thank you for your confidence in selecting the model 2795. ·we know you will find your transceiver as exciting as it is practical. Only the highest quality components are incorporated into your radio to assure reliability and maximum performance. * Installing and operating the transceiver is not complicated. but the flexibility provided by its many features may not be fully appreciated until a little time is spent becoming familiar with its controls and connections. It will be to your advantage to save the packaging material - carton, filler, cushioning, etc., they will prove valuable in preventing damage should you ever have occasion to transport or ship the unit.

introduction

2

Use of the mo ile transceiver at low level signal condition "is normally limited by the presence of ele trical noises. The primary source of noise in an automobile installation is from the ge erator and ignition system in the vehicle. Under most operating con- ditions, when s gnal level is adequate, the background noise does not present a serious problem. Also hen extremely low level signals are being received the transceiver may be operated with he vehicle engine off. The unit requires very low current and therefore will not signifi antly discharge the battery. Even thouqh your transceiver has a noise blanker, in so e installations ignition noise interference may be high enough to make good communi ations impossible. The electrical noise may come from several sources. Many possibilities exist and variations between vehicles require different solutions to reduce the noises. Consult with your dealer or two-way radio technician for help in locating and cor,ecting the source of severe noise interference.

Ignition Noise I terference

Mounting and C nnections

The transceiver is supplied with a universal mounting bracket. The transceiver is held in the bracket by two bolts permitting adjustment to the most convenient.angle. The bracket must b mounted with the machine screws and the nuts supplied. The mounting must be mecha ically strong and also provide a good electrical contact to the chassis of the vehicle. Pro eed as fol lows to mount the transceiver. 1. After you h ve determined the most convenient location in your vehicle, hold the transceiver wit mounting bracket in the exact location desired If nothing interferes with mounting it in the desired location, remove the mounting bracket and use it as a template to ma k the location for. the mounting bolts. Before drilling the holes, make sure nothing int rferes with the installation of the mounting bolts. 2. Connect the antenna cable plug to the standard receptacle on the rear panel. Most CB antennas ar terminated with a type PL-259 plug and mate with the receptacle of the transceiver. 3. Connect tne ower cord plug to the de power socket on rear panel. 4. Negative Gr und Systems. Almost all domestic mobiles and trucks are negative grounded. The red lead at the end of the power cord connects to the positive pole of the battery or e ectrical system, and the black lead connects to the negative pole of the battery or suita le chassis ground. 5. Positive Gro nd Systems. In positive ground system mobile, connect the red lead to the positive ole of the battery or suitable chassis ground, and the black lead to the negative pole of the battery or electrical system. 6. Mount the microphone bracket to dashboard or other convenient location.

Installation

Plan the locati n of the transceiver and the microphone bracket before starting the installation. S lect a location that is convenient for operation and does not interfere with the driver or passengers in the vehicle. The transceiver is usually mounted under- neath the dash anel.

installatio s

4

Controls There are 9 cont ols and 2 indicators on the front panel of your transceiver. 1. Volume/Sque ch. These are concentrical controls which do the following individual adjustment: Volume (inner nob). Turn clockwise to apply power to the radio and set the desired listening level. uelch (outer knob). This control is used to cut off or eliminate the re- ceiver backgrou d noise in the absence of an incoming signal. For maximum receive sensitivity the ntrol should be adjusted only to the point where the receiver back- ground noise is liminated. Turn fully counterclockwise then slowly clockwise until the receiver noise di appears. Any signal to be received must now be slightly higher than the average received noise. Further clockwise rotation will increase the threshold level which a signal must o ercome to be heard. Only strong signals will be heard at a maximum clockwise settin . 2. L/M/H (Band Switch). In this transceiver, 120 channels are divided into 3 groups of 40 channels, lo 40, middle 40, and high 40. Set this selector to the position to which the channel you esire belongs. 3. FM-LSB-USB AM. This selects the mode of operation in either FM, AM, upper side- band, or lower ideband. Transmissions in the FM, AM or sideband mode can only be communicated t a station operating in the same mode. 4. Channel Sele tor. This switch selects one of 120 channels desired in conjunction with the L/M/H Band switch. The selected channel will be digitally displayed in the window above. Channels 1 thr ugh 40 are selected on this selector with the Hi-Lo Band switch placed in the L positio , channels 41 through 80 in the M position, while channels 81 through 120 in the Hi po ition. 5. Channel lndi ator. This is an LED (light emitting diode} digital channel readout to show the chann I selected by the Channel selector. 6. RF Gain. ontrols the reception sensitivity of the receiver. If a station received sounds distorte , place this control in counterclockwise position where the S meter pointer does no exceed S9. 7. Clarifier. Th s provides fine tuning of the receiver On regular AM or FM reception, this wi II permit adjustment to off-frequency transmissions. In the SSB (either USB, or LSB) modes, thi is used as a voice clarifier to adjust for clearer voice reception. B. Meter. This shows the relative strength of an incoming signal from the antenna, and transmit po er output to the antenna. The meter is illuminated when power is on. 9. Tone Switch. Changes the receiving audio quality in two ways. Hi position empha- sizes high tones, hile Lo position emphasizes low tones. 10. NB (noise lanker) Switch. In the NB position, the RF noise blanker is activated. The noise blank r is very effective in reduction of repetitive impulse noise such as ignition interference.

control f u ctions

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Transmit Operati n

After you have hecked that the channel you have chosen is clear proceed as follows. 1. Select a mode f emission - FM, LSB, USB or AM. 2. Again, makes re that the channel is clear. 3. Depress the tr nsmit switch on the microphone. 4. Speak clearly ith your mouth 5 to 6 cm from microphone. 5. To stop trans ission and receive, release the transmit switch. 6. Allow a 2 to 3 second break between the incoming signal and your transmission.

Receive Operatio

Connect the mic phone to the radio and proceed as follows: 1. Rotate the Sq elch control to 9 o'clock position. 2. Rotate the R Gain control in fully clockwise position. 3. Temporarily, lace the FM-LSB-USB-AM switch in AM position. 4. Turn unit on by rotating the Volume control clockwise and set for a comfortable I istening level. 5. Select a chan el that is unoccupied by any other station and turn Squelch control clockwise slowly ntil the hissing noise just disappears. 6. Adjust the F -LSB-USB-AM switch and Clarifier for FM or SSB. reception. The knack of adjusti g the Clarifier is very critical and important when listening to an SSB signal. We sugges you spend some time becoming familiar with its use.

Microphone and ransmit Switch The receiver an transmitter are controlled by the transmit switch at the side of the microphone (su plied). Depress the transmit switch and the transmitter is activated, release the switc to receive. When transmitting hold the microphone 5 or 6 centimeters from your lips a d speak in a normal voice. The transceiver will not be operative without microphone con ected to avoid unauthorized use.

operation

7

Maintenance The transceiver is specifically designed for the environment encountered in mobile in- stallation. The use of fully transistorized circuitry containing very reliable I Cs and semi- conductors result in high reliability and stability in both transmit and receive operation. Should a failure occur, however, replace parts only with identical parts specified in the schematic diagram (page 9). If the performance described in the Receive Operation and Transmit Operation selections can not be obtained, review the instructions to ensure that the proper procedures are followed. If a problem still exists, ask your dealer or qualified radio technician for specific information.

maintenance

8

Transmit Portion Harmonic Suppression: 60 dB down. SSB Generation: Double balanced modulator with crystalIattice filter. Carrier Suppression (SSB): 40 dB down. Opposite Sideband Suppression (SSB): 60 dB down. Rf Output Power at 13.8 volts de (AM/FM): 7.5 watts. RF Output Power at 13.8 volts de (SSB): 12 watts PEP.

Receive Portion Sensitivity at 10 dB S/N (AM): 0.7 microvolts". Sensitivity at 10 dB S/N (SSB): 0.2 microvolts*. Sensitivity at 20 dB SIN {FM): 0.5 microvolts*. IF Response at 6 dB down (AM): 6 kHz. IF Response at 6 dB down (SSB): 2 kHz. IF Response at 6 dB down (FM): 6 kHz Audio Output Power for 8 ohms: 3 watts. Clarification: ±800 Hz. Squelch Range: 0.7 to 300 microvolts. Intermediate frequency (AM/FM): 10.695 MHz, 455 kHz. Intermediate Frequency (SSB): 10.695 MHz. * : with the RF Gain in fully clockwise position.

General Frequency Composition: PLL (phase locked loop) synthesization. Frequency Range: 26.965 to 28.305 MHz. Channels: 120 Frequency Tolerance: ±0.005%. Emission: FM, AM, lower sideband, upper sideband. Operating Temperature Range: -30°C to +50°C. Operating Power Voltage: 13.8 volts (nominal 12 volts) de.

technical information

9

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schematic diagram

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