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Radio Road Which tuner to get and getting the most from it. Thank God, for the radio! |
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Radio Road Which tuner to get and getting the most from it. Thank God, for the radio! |
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In Reply to: Fisher KM-60 problem posted by posaune32foot@gmail.com on June 17, 2024 at 13:27:07:
That one uses a selenium rectifier full wave bridge.
Shown on the schematic as SR. They are known to go bad whan old, and usually smell bad on the way out. You can replace a SR with normal 1200V rated silicon diodes, but they will have significantly less voltage drop. To match the old B+ voltage you can insert a power resistor in series after the diodes.
That's a great tuner, mostly a kit version of the FM100B with different metering. I like the KM-60 horizontal tube for tuning, like certain Sherwood S3000 models meters...
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Follow Ups
- RE: Fisher KM-60 problem - BFitz 13:35:10 06/19/24 (0)
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