[Amps] PROBLEM WITH HUM

[Bob Gibson <w5rg@yahoo.com>]

Hi..I have built a YC156 amp and I have a problem with hum in the audio..I key 
the radio in SSB with the amp in line but not keyed and I get this hum and its 
coming from the filament transformer..I opened it up and disconnected the 
filament transformer then again keyed and no hum..I have tried grounding all 
kinds of ways and still hum..Would some beads help out? Thanks Bob W5RG

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