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Trying to help a friend. Has a 142 base. AM TX & RX is fine, SSB RX is fine but no SSB TX. Anyone know what component failure would stop SSB TX even though AM is normal?
Wouldn't hurt to shoot a little contact cleaner in VR7, and move it around a bit. If cleaning/adjusting VR7 don't make a difference, it's possible that TR25 has gone faulty. TR25 is a 2SC945, a common low/medium gain multi-purpose audio amp transistor. Good luck!
Please advise me to what is a good replacement mic for my SR-497HPC... Answer: 497 is "wired like Cobra", so many choices available. That radio does not need a power mic, so purchase a stock "coffin style" mic with a decent cord, like the ones that Astatic uses. The Superstar DM-507 is my go-to. https://www.ebay.com/itm/3050474478...adANq91JSiEEnz8EGqPJRBloTgEyaVsBoCtoMQAvD_BwE $12.99 + .99 cent shipping.
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