30-10-2012, 08:11 PM
(30-10-2012, 05:59 PM)Mr Clock Wrote: Thanks Joe.This the sort of amp I want to build. I want to build a stripped down version.With less inputs,and a simpler OPT. I would appreciate your thoughts. The PSU seems to me to overly complex with two transformers. I,m unable to fathom wether this is a PA amp or a HiFi amp. The bumf I,ve read so far,on various forums etc is mixed. The consensus is, its a good design/amp. The translation of the full text,is ambigouous,Andy.
Hi there, judging by the pictures and the standby switch I would say it was designed as a PA amp.
The second transformer supplies the valve heaters and the seperate standby bias, the bridge supplying the preamp valve heaters is self explanatory.
Why two transformers? Better overalll regulation/spreads wattage disipation/better regulation on grid bias as unaffected by standby switch position, my thoughts, someone might know otherwise or have other ideas. Looks a well thought out design.
Lawrence.
