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Projects
| Item | Settings | Adjust | Measurement |
|---|---|---|---|
| VCC Voltage | Set radio to fr pool 12, CH40 AM RX mode, connect multimeter to B+ (EPT0SSB62A) | VR601 on Power PCB | 13.8VDC +/- 0.1V |
| VCO Voltage | Disconnect short pcb from TP7 TP8 & TP9. Set radio to fr pool 12 CH40 AM RX connect multimeter to TP2 | L14 | 6.5VDC +/- 0.1V |
| AM Frequency | Set radio to fr pool 4 CH1 AM RX Connect freq counter to TP3 | L20 | 14.9200MHz +/- 20Hz |
| AM Frequency | Set radio to fr pool 10 CH1 AM RX Connect freq counter to TP3 | L17 | 17.6200MHz +/- 20Hz |
| USB Frequency | Set radio to fr pool 4 CH1 USB RX, connect freq counter to TP 3 | L21 | 14.9225MHz +/- 20Hz |
| USB Frequency | Set radio to fr pool 10 CH1 USB RX, connect freq counter to TP 3 | L18 | 17.6225MHz +/- 20Hz |
| LSB Frequency | Set radio to fr pool 4 CH1 LSB RX, connect freq counter to TP 3 | L21 | 14.9175MHz +/- 20Hz |
| LSB Frequency | Set radio to fr pool 10 CH1 LSB RX, connect freq counter to TP 3 | L19 | 17.6175MHz +/- 20Hz |
| TX Frequency | Set radio to fr pool 10 CH1 AM TX mode set coarse/fine control to 12 o’clock. connect freq counter to TP3 | VR7 | 17.6200MHz +/- 20Hz |
| AM OSC | Set radio to fr pool 7, CH1 AM TX mode, connect freq counter to TP5 | L23 | 10.6950MHz +/- 10Hz |
| USB OSC | Set radio to fr pool 7 CH1 USB TX mode. short the collector & emitter of Q34, connect freq counter to TP 5 | L24 | 10.6925MHz +/- 10Hz |
| LSB OSC | Set radio to freq pool 7 CH1 LSB TX mode, short collector & emitter of Q34, connect freq coutner to TP 5 | L25 | 10.6975MHz +/- 10Hz |
| Item | Settings | Adjust | Measurement |
|---|---|---|---|
| TX POWER | Set radio to fr pool 7 CH1 AM TX MODE modulation off/set radio to fr pool 7 CH1 USB TX Mode. Mic gain control fully clockwise, rf power control fully clockwise, set coarse/fine control at 12 o’clock. AF signal 30mV with 1KHz tone to microphone. connect oscope to Q51 collector. set radio to 24.265MHz and 29.655MHz | L40,L42,L43,L44 | Maximum output / L43,L44 max output and balance between low freq high freq |
| AM APC | Set radio to fr pool 7 CH1 AM TX Mode, connect multimeter to TP7 | VR14 | 6VDC |
| SSB APC | Set radio to fr pool 7 CH1 AM TX Mode, connect multimeter to TP7 | VR17 | 12.5VDC |
| BIAS CURRENT | Set radio to fr pool 7 CH1 AM TX mode, modulation off. Connect current meter to TP7(+) and TP9(-) | VR12 | 100mA |
| BIAS CURRENT | Set radio to fr pool 7 CH1 AM TX mode, modulation off. Connect current meter to TP7(+) and TP8(-) | VR10 + VR11 | (50mA + 50mA) = 100mA |
| AM/FM TX POWER HIGH | Set radio to fr pool 7 CH1 AM TX Mode. Set RF PWR controll fully clockwise. Modulation off. Connect “short pcb” to TP7 TP8 TP9. Connect RF power meter to antenna input | VR14 | 10W |
| AM/FM TX POWER LOW | Set radio to fr pool 7 CH1 AM TX Mode. Set RF PWR controll fully counter-clockwise. Modulation off. Connect “short pcb” to TP7 TP8 TP9. Connect RF power meter to antenna input | VR18 | 1W |
| RF PWR METER | Set radio to fr pool 7 CH1 AM TX mode Set RF PWR control fully clockwise | VR9 | For a needle reading of 10 on TX PWR scale |
| AM MODULATION | Set radio to fr pool 7 CH1 AM TX Mode, set mic gain control fully clockwise, AF signal 30mV 1KHz tone to microphone | VR16 | 100% |
| AM MOD METER | Set radio to fr pool 7 CH1 AM TX Mode, set mic gain control fully clockwise, set calabrate control fully counter-clockwise. AF signal 30mV 1KHz tone to microphone | VR15 | For a needle reading of 100% on MOD scale |
| FM DEVIATION | Set radio to fr pool 7 CH1 FM TX mode. Set mic gain control fully clockwise. AF signal 30mV 1KHz tone to microphone | VR5 | 4KHz Deviation |
| SSB ALC | Set radio to fr pool 7 CH1 USB TX Mode. AF signal 30mV 1KHz tone to microphone | VR13 | 25W |
| SSB CARRIER BALANCE | Set radio to fr pool 7 CH1 USB TX Mode. AF signal 30mV 1KHz tone to microphone Connect oscope to antenna jack | VR6 | Spurious emissions to minimum |
| CW TX | Set radio to fr pool 7 CH1 CW TX mode. plug in CW key, Disconnect the mic jack. connect AC voltmeter to EXT SP | VR8 | 200mV (Sine Wave) |
| FRQUENCY COUNTER ADJUST | Set radio to fr pool 7 CH1 AM RX Mode Set dim control fully clockwise | VC1 on Freq counter PCB | Dispaly should read 26.9650 |
| Item | Settings | Adjust | Measurement |
|---|---|---|---|
| AM SENSITIVITY | Set radio to fr pool 7 CH1 AM RX mode. set fine.coarse control at 12 o’clock. set RF gain control fully clockwise. set SQL control fully counter-clockwise. set NB/ANL switch to OFF. Set VOL control at 2 o’clock. connect RF SIG Gen to 26.9650MHz 1uV 1KHz tone @ 30% modulation. | L5 L6 L7 L8 L9 L10 L2 L3 | Audio Output > 2V. S/N > 10dB |
| AM SENSITIVITY | Set radio to fr pool 7 CH1 AM RX mode. set fine.coarse control at 12 o’clock. set RF gain control fully clockwise. set SQL control fully counter-clockwise. set NB/ANL switch to OFF. Set VOL control at 2 o’clock. connect RF SIG Gen to 24.265/29.655 1uV 1KHz tone @ 30% modulation. | L5 L6 L7 | Balance between 24.265MHz and 29.655MHz |
| FM SENSITIVITY | Set radio to fr pool 7 CH1 FM RX. RF Sig Gen setting 26.965MHz 0.5uV 1KHz tone at 3KHz deviation | L4 | S/N > 20dB |
| USB SENSITIVITY | Set radio to fr pool 7 CH1 FM RX. RF Sig Gen setting 26.966MHz 0.25uV Mod OFF | L11 L12 | Audio Output > 2V. S/N > 10dB |
| LSB SENSITIVITY | Set radio to fr pool 7 CH1 FM RX. RF Sig Gen setting 26.964MHz 0.25uV Mod OFF | L11 L12 | Audio Output > 2V. S/N > 10dB |
| AM S-METER | Set radio to fr pool 7 CH1 AM RX. RF Sig Gen setting 26.965MHz 100uV | VR1 | For a reading of 9 on the s-meter |
| SSB S-METER | Set radio to fr pool 7 CH1 USB RX. RF Sig Gen setting 26.966MHz 100uV | VR2 | For a reading of 9 on the s-meter |
| AM SQL | Set radio to fr pool 7 CH1 AM RX. set SQL control fully clockwise. RF Sig Gen to 26.965MHz 1mV Mod off | VR4 slowly | Adjust slowly until SQL just opens |
| SSB SQL | Set radio to fr pool 7 CH1 USB RX. set SQL control fully clockwise. RF Sig Gen to 26.966MHz 1mV Mod off | VR3 slowly | Adjust slowly until SQL just opens |
| NB ADJUST | Set radio to fr pool 7 CH1 AM RX. RF Sig Gen to 26.965MHz 100uV Mod OFF SEt NB/ANL ON connect multimeter to TP1 | L1 | DC Volatage to max > 2V |
| Item | Settings | Adjust | Measurement |
|---|---|---|---|
| SENSITIVITY | Set radio to WX mode, VOL control at 2 o’clock. SQL control fully counter clockwise. RF SG to Antenna input. RF Sig Gen to 162.000MHz 100uV 1KHz tone at 4KHz deviation | L5 | Max output min distortion |
| SENSITIVITY | Set radio to WX mode, VOL control at 2 o’clock. SQL control fully counter clockwise. RF SG to Antenna input. RF Sig Gen to 162.000MHz 100uV 1KHz tone at 4KHz deviation | L4 L3 | reduce SG level and adjust for max S/N reading |
| SENSITIVITY | Set radio to WX mode, VOL control at 2 o’clock. SQL control fully counter clockwise. RF SG to Antenna input. RF Sig Gen to 162.300MHz/162.600MHz 100uV 1KHz tone at 4KHz deviation | VR2 | Automatic Lock Freq |
| ALERT FREQ | Set radio to WX mode, connect freq counter to IC5 (pin5) | VR4 | 1050Hz |
| ALERT SOUND | Set radio to WX mode. RF Sig Gen to 162.475MHz 1uV 1050Hz tone at 4KHz deviation | VR3 | adjust until alert sound is heard from radio |