Greetings all. I have a pair of Altec 1570B amplifiers that I have been slowly rebuilding. I now have them up and screaming and I enjoy them a lot. My question is this: There is a 1000 volt 6uF capacitor in the B+ supply (C8 on the schem) that is a bit leaky. I read on another forum (cant remember where) that this cap value should not be changed because it is a "tuned circuit". Looking at the schematic it looks like a straightforward tube rectified LC supply to me. I know that the cap value for rectifier tubes cannot be too high but I have 2 new 7.5uF caps to replace the 6uF caps. An extra 1.5uF is not enough to harm the tubes but I am puzzled about this tuned circuit bit. Was it just someone blowing smoke or do they know/see something I don't?
Anyway, should I change these caps and bump up the extra 1.5uF?
Attached is a schematic. Fire away, inquiring minds want to know!
Anyway, should I change these caps and bump up the extra 1.5uF?
Attached is a schematic. Fire away, inquiring minds want to know!