<div dir="ltr"><div><div><div><div><div>Hi, gang!<br><br></div>Well, now that the rx is working a lot better, I have a new problem - LOW tx audio. I can get full power in tuneup, that's fine. With the mic level set at 50%, I can get full-power with a whistle-up. But, nearly nothing when speaking. I'm using a good Heathkit mobile mic I've had for years, the Turner 350 that was made for Heath.<br>
<br></div>Looking at the boards, I suspect something is amiss on Board B, the Transmit Audio Board. Looking at the schematic, I'm wondering if the Q201, the quad OP-AMP could be the culprit? This provides the two stages of amplification. LM3900N chips are pretty common and available. Before I head to the 'Bay and get one (or maybe my local RS store might have one on a blister-card), does anyone on the list have any similar experience like this, and what did you discover?<br>
<br></div>When I got this 104A three years ago, it ran great and has been a solid rig. But, as with anything like this, past history is, well, just that.<br><br></div>Thanks tons for your kind help, folks!<br><br>73,<br><br>
</div>Sandy AC1Y<br></div>