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IC 512 is not any part I'm familiar with in these radios. If you can do a better job of describing the IC by board number, part number, or posting a picture, you are likely to get your answer.
greetings from deep south texas!!! you need plessey1611s iwould advise to buy sockets for this...did you do the diode fix( i am assuming that you have out of lock /92.xxx thing. well heres the ebay auction number where i got mine 126370562945 sellers name is kmec-at-aol , believe me it was a long hard search have you seen the cobra service sheet? want it i can dig it up...gimme a reply lemme know whats up...hope this helps 73s...ralph
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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