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I know this is old but I'm sure someone will need this again some day. Had one come in that I needed the info for as well but had to figure out with radio schematic instead since not much available for this radio out there for mic wiring....so here ya go:
D104/Astatic/Para Dynamics Wiring 4 Pin Panasonic RJ3200, RJ3600 and RJ3660
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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