background image

 
 

RECEIVER 

 

Sensitivity 

AM: 0.5 

V for 10 dB (S+N)/N at greater than 

½  -watt of audio output. 

 

FM: 1.0 

V for 20 dB (S+N)/N at greater than 

½ -watt of audio output. 

Selectivity 

AM/FM: 6 dB @ 3 KHz, 50 dB @ 9 KHz. 

Image Rejection 

More than 65 dB. 

IF Frequency 

AM/FM: 10.695 MHz 1

st

 IF, 455 KHz 2

nd

  

IF         

Adjacent-Channel 
Rejection 

60 dB AM 

RF Gain Control 

45  dB  adjustable  for  optimum  signal 
reception. 

Automatic Gain Control 
(AGC) 

Less  than  10  dB  change  in  audio  output  for 
inputs from 10 to 1,000mV. 

Squelch 

Adjustable; threshold less than 0.5 

V. 

ANL 

Switchable 

Noise Blanker 

RF type 

Audio Output Power 

4 watts into 8 ohms. 

Frequency Response 

300 to 2500

 

Hz. 

Built-in Speaker 

8 ohms, round. 

External Speaker (Not 
Supplied) 

8  ohms;  disables  internal  speaker  when 
connected. 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Installation 

 

LOCATION 

       Plan the location of the transceiver and microphone bracket before starting the 
installation. Select a location that is convenient for operation and does not interfere 
with  the  driver  or  passengers  in  the  vehicles.  In  automobiles,  the  transceiver  is 
usually mounted below the dash panel, with the microphone bracket beside it. 

 

MOUNTING THE RADIO 

Your  transceiver  is  supplied  with  a  universal  mounting  bracket.  When 

mounting  the  bracket  and  radio  to  your  car,  make  sure  it  is  mechanically  strong. 
Also provide 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  interfere  with  the 
installation of the mounting bolts. 

 
2.

 

Connect the antenna coax connector to the standard antenna connector on the 
rear  panel  of  the  radio.  Most  antennas  are  terminated  with  a  type  PL-259 
connector. 

 

 

3.

 

Connect the red DC power input wire (with the fuse) to +13.8V DC. This wire 
extends  from  the  rear  panel.  In  automatic  installation,  +13.8V  DC  is  usually 
obtained from the accessory contact on the ignition switch. This prevents the 
set being left on accidentally when the driver leaves the car and also permits 
operating the unit without the engine running. Locate the accessory contact on 
most  ignition  switches  by  tracing  the  power  wire  from  the  AM  broadcast 
receiver in the car. 

 

4.

 

Connect  the  black  lead  to  –13.8V  DC. This  is  usually  the  chassis  of  the  car. 
Any  convenient  location  with  good  electrical  contact  (remove  paint)  may  be 
used. 

 

5.

 

Mount the microphone bracket on the right side of the transceiver or near the 
transceiver,  using  two  screws  supplied.  When  mounting  in  an  automobile, 
place the bracket under the dash so the microphone is readily accessible.   

 

 

 

 

- - 

 

-3- 

-4- 

Summary of Contents for DX 44HP

Page 1: ...Printed In Taiwan P N A412308COA DX 44HP 10 Meter Amateur Mobile Transceiver OWNER S MANUAL...

Page 2: ...ange 20 C to 50 C Microphone Plug in dynamic with push to talk switch and coiled cord Input Voltage Current 13 8V DC nominal 15 9V max 11 7V min Positive or negative ground Transmit AM FM Hi Power _ 1...

Page 3: ...od 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 mo...

Page 4: ...nal characteristic will be observed only at extreme distance A standard antenna connector type SO239 is provided on the transceiver for easy connection to a standard PL 259 cable termination If the tr...

Page 5: ...in of the received signal under strong signal conditions 6 MIC GAIN CONTROL inner dual concentric Adjust the microphone gain in transmit and PA modes This controls the gain to the extent that full tal...

Page 6: ...O position it will add an echo effect to your voice Both Echo and Talkback are off when this switch is in the OFF position 20 10KHz LED This LED lights green when the frequency is shifted up 10KHz 21...

Page 7: ...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 microphon...

Page 8: ...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...

Page 9: ...MEMO 15 MEMO 16...

Page 10: ...tant because it will help the technician who works 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 plea...

Reviews: