background image

5.  MODE (PA/FM/AM) SWITCH. 

This switch is used to select PA, FM, AM 

mode of operation. The AM or FM mode is normally, but when you set to PA 
position, the transceiver acts as a public address amplifier. Before operating 
PA, you must first connect an external PA speaker (8 ohm, more than 2W) to 
the PA Speaker jack on the unit rear panel.

 

 
6. BAND 

SELECTOR. 

This switch selects A, B, C, D, E, F, G or H band of 

operation.

 

 
7. E-TONE.

 This control is used to echo effect and intervals of echo sound.

 

 
8.  RF POWER CONTROL.

 Adjust this control to acquire RF power level you 

desired in AM or FM transmission.

 

 
9. CHANNEL 

SELECTOR.

 This switch selects any one of the forty channels 

desired. The selected channel appears on the LED readout directly above the 
Channel Selector knob.

 

 
10. METER.

 This meter indicates received signal strength, transmitter RF output 

power.

 

 
11. BEEP/DIMMER SWITCH.

 This switch is used to select ROGER BEEP and 

lower the level of brightness of display.

 

 
12. BAND SWITCH-HI/LOW.

 This switch is used to select High band and or 

Low band Frequency Range.

 

 
13. +10KHz FREQUENCY SHIFT SWITCH. 

When switch is pressed the 

frequency is shifted 10KHz up. On following channels. A channel can be used 
by setting this switch to +10KHz position. 

 

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 receiver/transmit LED 

indicator is located next to the channel indicator. When in receive, the LED 
will be green. When in transmit the LED will be red.

  

 
16. CHANNEL INDICATOR.

 Numbered LED indicates the selected channel 

you wish to operate on. LED indicates “9” when CH-9 is switched on.

 

 
REAR PANEL 

 

 

 
17. POWER. 

Accepts 13.8V DC power cable with built-in fuse (4 amp.) to be 

connected. 

 
18. EXT SP. 

Accepts 4 to 8 ohms, 5 watt external speaker to be connected. When 

external speaker is connected to this jack, the built-in speaker is automatically 
disconnected. 

 

19. PA. SP.

 Used to connect a PA speaker (8 ohm 4W) for PA operation. Before 

operating PA you must first connect a PA speaker to this jack. 

 

20. ANTENNA.

 Accepts 50 ohm coaxial cable with a type PL-259 plug to be 

connected. 

 

21. F.C. 

This socket is optional for the accessories FREQUENCY COUNTER 

model FC-347, to indicate the value of the frequency ranges used.

 

 
 
 
 
 
 
 
 
 

- 9 - 

- 10 - 

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...

Reviews: