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D.  Try a different location on your car (keeping in mind the radiation pattern 

you wish) 

 

E.  Is the antenna perfectly vertical? 

 

F.  Try a different location in your neighborhood. Stay away from large 

metal objects when adjusting (metal telephone or light posts, fences, etc.). 

 

 

 
 
 
 

 

EXTERNAL SPEAKER 

The external speaker jack (EXT.SPK) on the rear panel is used for remote 

receiver monitoring. The external speaker should have 8 ohms impedance and be 
able to handle at least 4 watts. When the external speaker is plugged in, the internal 
speaker is disconnected. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Operation 

 

CONTROL FUNCTIONS 

There are thirteen controls and three indicators on the front panel of your 

transceiver. 

 

 

FRONT PANEL 

 

1.  OFF/ON/VOLUME (inner dual concentric). 

Turn clockwise to apply power 

to the unit and to set the desired listening level. During normal operation, the 
VOLUME control is used to adjust the output level obtained either at the 
transceiver speaker or the external speaker, if used. 

 
2.  SQUELCH (outer dual concentric). 

This control is used to cut off or 

eliminate receiver background noise in the absence of an incoming signal. For 
maximum receiver sensitivity it is desired that the control be adjusted only to 
the point where the receiver background noise or ambient backgrounds noise is 
eliminated. Turn fully counterclockwise then slowly clockwise until the 
receiver noise disappears. Any signal to be received must now be slightly 
stronger than the average received noise. Further clockwise rotation will 
increase the threshold level, which a signal must overcome in order to be 
heard. Only strong signals will be heard at a maximum clockwise setting.   

 

3.  MIC GAIN (inner dual concentric).

 Adjust the microphone gain in the 

transmit and PA modes. This controls the gain to the extent that full talk power 
is available several inches away from the microphone. 

 

4.  RF GAIN CONTROL (outer dual concentric). 

Use to reduce the gain of the 

RF amplifier under strong signal conditions. 

 

The transceiver will operate into an SWR of 2 to 1 indefinitely 
and sustain an SWR of 20:1 for a maximum of 5 minutes at rated 
operating conditions. 

- 8 - 

- 7 - 

NOTE 

Summary of Contents for DX 44V

Page 1: ...rks on your radio to locate your problem Intermittent problems are easily overlooked so be sure to give as much detail as possible in your note Also please include your telephone number in case our technicians have any additional questions Do not send your power cord or microphone unless we ask for these items during our telephone conversation You are responsible for getting the radio safely to us...

Page 2: ...ange 30 C to 50 C Microphone Plug in dynamic with push to talk switch and coiled cord Input Voltage 13 8V DC nominal 15 9V max 11 7V min Positive or negative ground Transmit AM full mod 2 2A Receiver Squelched 0 3A Maximum Audio output 0 7A Size 2 3 8 H x 7 7 8 W x 9 1 4 D Weight 5 Ibs Antenna Connector UHF SO239 Meter Illuminated indicates relative output power received signal strength TRANSMITTE...

Page 3: ...ide a good electrical connection to the chassis of the vehicle Proceed as follows to mount the transceiver 1 After you have determined the most convenient location in your vehicle hold the transceiver with mounting bracket in the exact location desired If nothing will interfere with mounting it in the desired position remove the mounting bolts Before drilling the holes make sure nothing will inter...

Page 4: ...onsult your dealer for information regarding an adequate grounding system and prevention of electrolysis between fittings in the hull and water TUNNING THE ANTENNA FOR OPTIMUM SWR Since there is such a wide variety of base and mobile antennas this section will strictly concern itself to the various types of mobile adjustable antennas Because the antenna length is directly related to the channel fr...

Page 5: ...d 2 SQUELCH outer dual concentric This control is used to cut off or eliminate receiver background noise in the absence of an incoming signal For maximum receiver sensitivity it is desired that the control be adjusted only to the point where the receiver background noise or ambient backgrounds noise is eliminated Turn fully counterclockwise then slowly clockwise until the receiver noise disappears...

Page 6: ...e frequency is shifted 10KHz up On following channels A channel can be used by setting this switch to 10KHz position Normal 10KHz 3 3A 7 7A 11 11A 15 15A 19 19A 14 OFF ANL NB When the switch is placed in the ANL NB position the RF noise blanker also is activated The RF noise blanker is very effective for repetitive impulse noise such as ignition interference 15 RECEIVER TRANSMIT INDICATOR The rece...

Page 7: ...F gain OPERATING PROCEDURE TO TRANSMIT 1 Select the desired channel of transmission 2 Set the MIC GAIN control fully clockwise 3 If the channel is clear depress the push to talk switch on the microphone and speak in a normal voice ALTERNATE MICROPHONES AND INSTALLATION For best results the user should select a low impedance dynamic type microphone or a transistorized microphone Transistorized type...

Page 8: ...f the microphone jack is used to hold the pin receptacle during the soldering operation best results are obtained when the connections to pins 1 and 3 are made first and then the connections to pins 2 and 4 Use a minimum amount of solder and be careful to prevent excessive solder accumulation on pins which could cause a short between the pin and the microphone plug housing 6 When all soldering con...

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