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Most Phantoms have a tuned input capacitor located on the rear panel.
It should be either a screwdriver slot adjustment or a shaft with small knob.
really touchy tuning if your radio has a swr meter just key into the amp and adjust for lowest swr . if no internal swr meter just place a swr meter between the radio and the amps input
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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