13-01-2025, 09:05 PM
Well, I suspect that the front-end RF cascode amp is knackered. The oscillator is oscillating and the mixer is mixing, but I have to feed in >= -10dB at the aerial socket to get a stable picture.
Approximate LO frequencies are:
Channel , Freq(MHz)
Some channels have definitely drifted, although it could be down to contacts I guess. I can only test siggen output on band I, mind, as my Siglent arb only goes up to 120 MHz, but all five band I channels perform the same.
Other reasons for suspecting the 30L1 (PCC84): I don't get noise or snow and there is barely any trace of getter around the top.
Approximate LO frequencies are:
Channel , Freq(MHz)
- 79.2
- 87.2
- 90.8
- 97.6
- 102
- 216.8
- 222
- 225.6
- 228.3
- 229
- 238
- 245.3
- 250.4
Some channels have definitely drifted, although it could be down to contacts I guess. I can only test siggen output on band I, mind, as my Siglent arb only goes up to 120 MHz, but all five band I channels perform the same.
Other reasons for suspecting the 30L1 (PCC84): I don't get noise or snow and there is barely any trace of getter around the top.
My name is Steve, but I answer to most things like "Oi, you!".
