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Gonna give both a try,Got the radio last week,its a mess,ebay deal was working ok then next morning no sound,was bounced around pretty good in shipping!
This radio is a true screwdriver special.power out is controlled by mic gain,output power on front panel doesn't do anything,has switch on back for power mod,lol,but came with dual fans..wow!!
More than likely a audio mod in there that's failing.
If my hunch is right they use MOSFET for switching power loads - so to have one fail or the speaker quit working - shows that the original designs' been modified - to what? I don't have much to go on, just your words...
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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