I just got a copy of a heathkit sb200. Uses (2) 572B tubes. Was thinking about trying to start with that schematic maybe. Maybe use less voltage and use 811A's. then again seen 572B's operating at 2500V and getting about 1000PEP.
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Tube amp help
- Thread starter Crusher
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@ ButtFuzz: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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