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Modifications for the Alinco DJ-162

Alinco DJ-162 Mod Ext RX/TX
Adjustment points for DJ-162TD 
Adjustment points for DJ-162ED 

 

  Alinco DJ-162 Mod Ext RX/TX  
     

I requested this mod from the net several times and received no responses.
This morning I see were N0RWZ has posted his luck with a similar inquiry.
Well, I finally found it so here it is.
  1. Remove the battery pack.
    Remove the battery plate from the bottom of the radio.

     
  2. Remove the back cover from the radio.
    This is a tedious process. You must take the knobs off the top and remove the top plate first.

     
  3. Under the Battery clasp on the side of the radio (The little sliding thumb switch that keeps the battery from falling off the radio) you will find a yellow loop of wire. This loop is small and hard to get to. You will need a very small pair of cutters or scissors.

    --Cut this wire.

     
  4. Put the radio back together

     
  5. Reset the radio. (You will lose your memories)

     
  6. Go to the VFO mode.
    Pressing the 'B' key on the keypad will now allow you to cycle through the extended rx bands. It will cycle from 2 meters, am aircraft, to 800. The radio does NOT have the guts to receive 800. It just happens to be in the processor so don't waste your time listening.

     
  7. This same jumper also opens extended transmit.

 

  Adjustment points for DJ-162TD  
     

1. Transmitting Unit
Item Adjustment Point Adjustment Method Spec
1. Frequency adjustment TC304 (RF PCB) Set the unit in the transmission mode at 146.03 MHz and adjust TC304.
(Transceiver tester, counter)		 146.03 MHz
±50 Hz
2. TX Power adjustment VR301 (RF PCB) (Hi power)
VR302 (RF PCB) (Lo Power)		 Adjust VR301 so that TX power becomes 3 W at 146.03 MHz.
Adjust VR302 so that TX power becomes 300 mW at 146.03 MHz.		 3.1W ±0.1W
300mW ±50mW
3. Modulation degree adjustment VR204 (IF PCB) Input a signal of 1 KHz/50mV into the MIC jack, transmitting at 146.03 MHz and adjust VR204 so that you obtain 4.7 KHz/Dev in the transmission mode. 4.7 KHz
±0.1 KHz
4. Sub audible tone VR203 (IF unit) Adjust 88.5 KHz by VR203 so that you obtain 800 HZ/dev. 800 Hz
±100 Hz
5. DTMF VR205 (IF PCB) Puch [1] in the transmission mode and adjust VR205 so that you obtain 3.1 KHz/Dev. 3.1 KHz
±100 Hz

2. Receiving Unit

 

Item Adjustment Point Adjustment Method Spec
1. VCO P/D voltage adjustment L106 (VCO) Adjust L106 so that P/D voltage is 2.0 V at 145.03 MHz. (DC voltmeter) in the transmission mode. 2.0 V
2. Detection Coil adjustment L202 (IF PCB) Input 1KHz, 3.5 KHz/Dev. +66dBµ at 146.05 MHz and adjust L202 so that detection power becomes maximum  
3. VHF FRONT END adjustment L306, L308, L309, TC305, L311, L312 (RF PCB) At 146.03 MHz and adjust L306, L308, L309, TC305, L311 and L312, so that 12 dB SINAD sensitivity becomes maximum. Under -9 dBµ
(EMF)
4. S-meter adjustment VR202 (IF PCB) Input a signal of 10 dBµ from transceiver tester at 146.03 MHz. Turn VR202 so that [FULL]-bar begins to light. 10dBµ ±1 dBµ
(EMF)
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  Adjustment points for DJ-162ED  
     

1. Transmitting Unit
Item Adjustment Point Adjustment Method Spec
1. Frequency adjustment TC304 (RF PCB) Set the unit in the transmission mode at 145.03 MHz and adjust TC304.
(Transceiver tester, counter)		 145.03 MHz
±50 Hz
2. TX Power adjustment VR301 (RF PCB) (Hi power)
VR302 (RF PCB) (Lo Power)		 Adjust VR301 so that TX power becomes 3 W at 145.99 MHz.
Adjust VR302 so that TX power becomes 300 mW at 145.99 MHz.		 3.1W ±0.1W
300mW ±50mW
3. Modulation degree adjustment VR204 (IF PCB) Input a signal of 1 KHz/50mV into the MIC jack, transmitting at 145.03 MHz and adjust VR204 so that you obtain 4.7 KHz/Dev in the transmission mode. 4.7 KHz
±0.1 KHz
4. Sub audible tone VR203 (IF unit) Transmit at 145.03 MHz and adjust VR203 to obtain a frequency modulation of 3.0 KHz, making sure that tone burst 1750 Hz within a range of 1750Hz ±20 Hz 3.0 KHz
±500 Hz
5. DTMF VR205 (IF PCB) Puch [1] in the transmission mode and adjust VR205 so that you obtain 3.1 KHz/Dev. 3.1 KHz
±100 Hz

2. Receiving Unit

Item Adjustment Point Adjustment Method Spec
1. VCO P/D voltage adjustment L106 (VCO) Adjust L106 so that P/D voltage is 2.0 V at 145.03 MHz. (DC voltmeter) in the transmission mode. 2.0 V
2. Detection Coil adjustment L202 (IF PCB) Input 1KHz, 3.5 KHz/Dev. +66dBµ at 145.03 MHz and adjust L202 so that detection power becomes maximum  
3. VHF FRONT END adjustment L306, L308, L309, TC305, L311, L312 (RF PCB) At 145.95 MHz and adjust L306, L308, L309, TC305, L311 and L312, so that 12 dB SINAD sensitivity becomes maximum. Under -9 dBµ
(EMF)
4. S-meter adjustment VR202 (IF PCB) Input a signal of 10 dBµ from transceiver tester at 145.95 MHz. Turn VR202 so that [FULL]-bar begins to light. 10dBµ ±1 dBµ
(EMF)
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