100W plexi...so um....are they supposed to be noisy?

[beasleybodyshop]

...

As for the hum, 60Hz is usually related to the heater circuit and the 120Hz is usually a power supply problem.

in these amps the hum is also related to the transformers. Specifically, the PT hums and the OT pickups up this hum even when the amp amp is on standby

Yeah i do hear some transformer hum - not much i can do about it though, the chassis im using is all set up for a 67/68' plexi. Apparently the 69' chassis are slightly different, moving the transformers further apart and causing less hum. oh well. lol.

[Roe]

...

As for the hum, 60Hz is usually related to the heater circuit and the 120Hz is usually a power supply problem.

in these amps the hum is also related to the transformers. Specifically, the PT hums and the OT pickups up this hum even when the amp amp is on standby

Yeah i do hear some transformer hum - not much i can do about it though, the chassis im using is all set up for a 67/68' plexi. Apparently the 69' chassis are slightly different, moving the transformers further apart and causing less hum. oh well. lol.

rotating the OT 90 degrees helps

[beasleybodyshop]

in these amps the hum is also related to the transformers. Specifically, the PT hums and the OT pickups up this hum even when the amp amp is on standby

Yeah i do hear some transformer hum - not much i can do about it though, the chassis im using is all set up for a 67/68' plexi. Apparently the 69' chassis are slightly different, moving the transformers further apart and causing less hum. oh well. lol.

rotating the OT 90 degrees helps

Thanks. Will give it a try.

[beasleybodyshop]

Amp is done! Man it sounds like a Plexi for sure. I found a late 70s JMP headcab for it - I replaced all the busted up corners and spruced up the dirty tolex. She looks as good as she sounds now!