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Modifications for the Alinco DJ-100
/ T
Expanded RF
1- Take out battery and antenna.
2- Remove screws from case and open radio.
3- Locate $ cut jumpers see drawing.
4- Clip pin 2 on IC401 (S7116A) and connect it to pin 14 ( for simplex PL
tone )
" clip is located on the TONE SW board ".
5- Reassemble the radio.
6- Don't forget to Reset Micro Processor.
Regards Droswstenvick
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| Adjustment points for DJ-100T |
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1. Transmitting Unit
| Item |
Adjustment Point |
Adjustment Method |
Spec |
| 1. Frequency adjustment |
CV301 (Main PCB) |
Set the unit in the
transmission mode at 144.03 MHz and adjust CV301.
(Transceiver tester, counter) |
144.03 MHz
±50 Hz |
| 2. Modulation degree
adjustment |
VR303 (Main PCB) |
Input a signal of 1
KHz/50mV into the SP/MIC jack and adjust VR303 so that you
obtain 4.7 KHz/DEV in the transmission mode. |
4.7 KHz
±0.2 KHz |
| 3. Subaudible tone |
VR401 (RF unit) |
Set the sub audible
tone to 114.8 Hz by DIP Switch and adjust VR401 so that you
obtain 800 Hz/Dev. |
800 Hz
±50Hz |
| 4. DTMF |
VR601 (DTMF Unit) |
Puch [1] in the
transmission mode and adjust VR601 so that you obtain 3
KHz/DEV. |
3 KHz
±500 Hz |
2. Receiving Unit
| Item |
Adjustment Point |
Adjustment Method |
Spec |
| 1. VCO P/D voltage
adjustment |
L502 (VCO) |
Adjust L502 so that P/D
voltage is 0,5 V at 144.03 MHz. (DC voltmeter) |
0.5 V
±0.1 V |
| 2. RF amp |
L405, 406, 407 & 408
(RF PCB) |
1 KHz, 3.5 KHz/Dev. - 6
dBµ (Meter direct reading). 145.03 MHz, audio output 50
mV/8ohm (Transceiver tester)
Adjust L405, 406, 407 & 408 so that SINAD sensitivity becomes
maximum. |
-2 dBµ Max. |
| 3. Squelch Sensitivity |
VR301 (Main PCB) |
1 KHz, 3.5 KHz/Dev, -8
dBµ (Meter direct reading), 145.02 MHz (Transceiver tester).
Turn VR301 counterclockwise from closed conditions and set to
a point where the squelch is open. |
-8 dBµ
±1 |
| 4. S-meter adjustment |
VR302 (Main PCB) |
1 KHz, 3.5 KHz/Dev, +17
dBµ (Meter direct reading).
Turn VR302 so that [FULL]-bar begins to light. |
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Have fun Droswstenvick |
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KB2LJJ