Heya all! I recently purchased a used 2970 for a good price off Ebay, but it has 2 problems, one is fairly minor, the other one is pretty major.
The major problem:
LSB is exactly 2.5 kc high off frequency. I have checked the frequency off of each oscillator can, the AM and USB cans are right on at 10.6950 (AM) and 10.6925 (USB). The LSB dials up at 10.7000 (+2.5kc high) I'm unable to do a full alignment on this radio, as I don't have all the equipment yet, but what I can tell you is that the clarifier IS locked, and in TX/RX, the AM/FM/USB are just fine, LSB is off 2.5kc. The LSB also sounds a bit distorted as well, which could be tied in somehow with the LSB being off frequency.
The minor problem: The clarifier knob is not linear when tuning, the potentiometer checked good on a multimeter for linearity and for resistance value, so that eliminates the clarifier pot itself being bad. It is linear about 3/4 turn, then "jumps". It does the same thing when the clarifier is either locked or unlocked.
Methinks someone had too many screwdrivers in the thing, I'd like to either be able to fix it myself, or send it to a reputable shop that could (hopefully) fix it without sending it back and saying, "It's junk." LOL
Any information would be most helpful, if you have questions, I can try to answer the best I can. Thanks in advance. Cheers!
-Rick
The major problem:
LSB is exactly 2.5 kc high off frequency. I have checked the frequency off of each oscillator can, the AM and USB cans are right on at 10.6950 (AM) and 10.6925 (USB). The LSB dials up at 10.7000 (+2.5kc high) I'm unable to do a full alignment on this radio, as I don't have all the equipment yet, but what I can tell you is that the clarifier IS locked, and in TX/RX, the AM/FM/USB are just fine, LSB is off 2.5kc. The LSB also sounds a bit distorted as well, which could be tied in somehow with the LSB being off frequency.
The minor problem: The clarifier knob is not linear when tuning, the potentiometer checked good on a multimeter for linearity and for resistance value, so that eliminates the clarifier pot itself being bad. It is linear about 3/4 turn, then "jumps". It does the same thing when the clarifier is either locked or unlocked.
Methinks someone had too many screwdrivers in the thing, I'd like to either be able to fix it myself, or send it to a reputable shop that could (hopefully) fix it without sending it back and saying, "It's junk." LOL
Any information would be most helpful, if you have questions, I can try to answer the best I can. Thanks in advance. Cheers!
-Rick