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RECEIVER 

 

Sensitivity 

AM:  1.0 

µ

V for 10 dB (S+N)/N at greater 

than ½ -watt of audio output. 

 

FM: 1.0 

µ

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 100,000 microvolts. 

Squelch 

Adjustable; threshold less than 0.5 

µ

V. 

ANL 

Switchable 

Noise Blanker 

RF type 

Audio Output Power 

4 watts into 8 ohms. 

Frequency Response 

300 to 2800 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 cable plug to the standard receptacle on the rear 

panel. Most antennas are terminated with a type PL-259 plug and mate 
with the receptacle. 

 

3.  Connect the red DC power input wire (with the fuse) to +13.8V DC. 

This wire extends from the rear panel. In automobile 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 ground. 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.   

 
 

 
 
 

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Summary of Contents for DX-55HP

Page 1: ...M FM Mobile Transceiver Built in Frequency Counter with Roger Beep OWNER S MANUAL OFF 10KHz OFF NB AM R B E A BAND B C D F OFF VOL SQ CLARIFIER MIC RF OFF DIM PWR OFF PA OFF FM F DISPLAY 0 SIGNAL 3 1...

Page 2: ...nge 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 4 5A Receiver S...

Page 3: ...de 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...

Page 4: ...eel hull Before installing the transceiver in a boat consult your dealer for information regarding an adequate grounding system and prevention of electrolysis between fittings in the hull and water TU...

Page 5: ...f 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 backgroun...

Page 6: ...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 12...

Page 7: ...TE MICROPHONES AND INSTALLATION OPERATING PROCEDURE TO RECEIVE 1 Be sure that power source microphone and antenna are connected to the proper connectors before going to the next step 2 Turn unit on by...

Page 8: ...re beginning the actual wiring read carefully the circuit and wiring information provided with the microphone you select Use the minimum head required in soldering the connections Keep the exposed wir...

Page 9: ...ophone plug are complete push the knurled ring and the housing forward and screw the housing onto the threaded portion of the pin receptacle body Note the location of the screw clearance hole in the p...

Page 10: ...est calling between 10 00 AM and 4 00 PM Pacific Time l Please include a note with a detailed description of the symptoms This is important because it will help the technician who works on your radio...

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