ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

previous: R.G. From your description, it sounds li... -- 7/25/1999 8:47 PM

Re: Low B+ voltage: Is it the xfrmr?

7/26/1999 11:55 AM
Farrow	Re: Low B+ voltage: Is it the xfrmr? I'm with R.G. on this one. Guild amps were made by Valco, (AFAIK) who also built Gretsch, Airline, etc. and they used whatever they could get their hands on. A lot of amps including a Silvertone I've got in the shop right now used 200V non-centertapped PTs. I prefer to replace this with a real PT (Bandmaster size) as it will run a bit cooler. I just redid one of those Monkey Ward amps with the 4-6L6 (cathode bias into 2 OTs!) this way and there was definitely an improvement in sound running the tubes at 450V (they were running about 385V...) Farrow http://surf.to/pharaohamps

7/26/1999 11:55 AM

Farrow

Re: Low B+ voltage: Is it the xfrmr?

I'm with R.G. on this one. Guild amps were made by Valco, (AFAIK) who also built Gretsch, Airline, etc. and they used whatever they could get their hands on. A lot of amps including a Silvertone I've got in the shop right now used 200V non-centertapped PTs. I prefer to replace this with a real PT (Bandmaster size) as it will run a bit cooler. I just redid one of those Monkey Ward amps with the 4-6L6 (cathode bias into 2 OTs!) this way and there was definitely an improvement in sound running the tubes at 450V (they were running about 385V...)

Farrow

http://surf.to/pharaohamps