60Hz hum with Dayton 70W plate amp

diydave · 15th July 2008, 06:59 PM

I have a Dayton 70W plate amp that I'm getting some hum from. The 60Hz hum happens no matter how I have it connected. Even if I have the amp on it's own circuit with nothing connected to it, I still get the hum as soon as I switch it on. Adjusting the gain on the amp doens't seem to affect the volume of the hum, so I guess that means the leakage into the signal path is happening after that section of the amp?

I have reason to believe the amp has done this right from the day I got it, but I'm using it in a different project where it's now audible if there is silence in the room.

Any suggestions on what do to?

Stormrider · 15th July 2008, 07:28 PM

It hums with nothing connected to it? If so, return it to PE.

15th July 2008, 06:59 PM	#1
diydave diyAudio Member Join Date: Jul 2005 Location: canada	60Hz hum with Dayton 70W plate amp I have a Dayton 70W plate amp that I'm getting some hum from. The 60Hz hum happens no matter how I have it connected. Even if I have the amp on it's own circuit with nothing connected to it, I still get the hum as soon as I switch it on. Adjusting the gain on the amp doens't seem to affect the volume of the hum, so I guess that means the leakage into the signal path is happening after that section of the amp? I have reason to believe the amp has done this right from the day I got it, but I'm using it in a different project where it's now audible if there is silence in the room. Any suggestions on what do to?

15th July 2008, 07:28 PM	#2
Stormrider diyAudio Member Join Date: Apr 2006 Location: Connecticut	It hums with nothing connected to it? If so, return it to PE. __________________ AJ

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