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June 22nd 08, 02:26 PM
posted to rec.antiques.radio+phono,rec.radio.amateur.boatanchors
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Tunable hum in Heathkit SB-401 RF output
wrote in message ... I’ve finished refurbishing a Heathkit SB-401 transmitter, but have one last problem to fix: 60 Hz tunable hum audible on the output. If it is "tunable" hum, heard only locally, why are you worried about it? That is being generated in the receiver, not the transmitter. Do distant stations hear the hum? That is the question. |
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