I have a 29 that started out with no sound. Verified the audio ic was bad and changed it (5 pin version). Have some sound, but very weak rx and no rf gain control. Checked tr7, and replaced it with a known working one, same with D3 and D3. Checked D5 and D6 and they checked good. Radio transmits fine. I tried a full alignment, but had to crank the signal generator up to 1k micro volts just to get a reading to begin alignment. It is on frequency. A strong neighbor's radio barely moves the needle. Any ideas?