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What about tune or CW, any output? Take each board loose and reset them in the edge connectors, if you haven't already done so. Fixed a lot of 101's just by cleaning edge connectors, a rub of the board contact edges with a soft rubber eraser and a quick wipe with a clean dry cloth will sometimes do the trick.
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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