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VR1 AM "S" Meter
VR2 SSB "TRX" Meter
VR3 Squelch
VR4 Carrier Balance
VR5 "TRX" Frequency
VR6 RF "TRX" Frequency
VR7 Modulation "AMC"NOT PRESENT ON SOME 148
VR8 Final Bias
VR9 Driver Bias
VR10 AM Power
VR11 SSB "ALC"
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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