Hello all, I'm new here, thanks for the wounderful forum!
I'm having a problem fixing my 5:25
the amp without V5 (rev tube) works perfectly, but when I fit in place starts humming a lot! very audible around 100hz.
Tried to swap V5 with a brand new tube, stills the same
I'm trying to figure out what goes in the schematic of the amp, and I realized that there are inductors / transformers (brand FALCO) that do not appear in the amp's squematic. So I started trying to figure out what they are doing there :/
I do not think the problem is in any filter cap, since the amp runs nice and without any humm, since V5 is not in the amp ... or maybe yes ... the C52 - 30uF/500V (the point B) that only goes to the rev circuit and to a zener diode in the power section ... can it be the problem? any idea anyone?
Many thanks in advance,
Ed
I'm having a problem fixing my 5:25
the amp without V5 (rev tube) works perfectly, but when I fit in place starts humming a lot! very audible around 100hz.Tried to swap V5 with a brand new tube, stills the same
I'm trying to figure out what goes in the schematic of the amp, and I realized that there are inductors / transformers (brand FALCO) that do not appear in the amp's squematic. So I started trying to figure out what they are doing there :/
I do not think the problem is in any filter cap, since the amp runs nice and without any humm, since V5 is not in the amp ... or maybe yes ... the C52 - 30uF/500V (the point B) that only goes to the rev circuit and to a zener diode in the power section ... can it be the problem? any idea anyone?
Many thanks in advance,
Ed
