From: info@turneraudio.com.au   
      
   On Wednesday, 7 November 2012 13:44:12 UTC+11, Phil Allison wrote:   
   > "patrick-turner" If you'd described the circuit more fully, I may not have   
   made my assumptions. ** FFS, Pat READ the description in my first post. " The   
   tube line up is two 300Bs in parallel and one 6SN7 per channel, 260mV   
   sensitivity, " .... Phil   
      
   I'm either forgetful, because I did read your first post, or, like so many   
   reluctant examples of the species Homo Wrectus, I am not perfect, and   
   sometimes need someone to repeat something they typed.   
      
   Though this is a little OT, whenever I think about 300Bs and SETs, I can't   
   help think about the pair of rare spare Jadis OPTs I have here. I think they'd   
   each work well with a pair of KT120 in triode and in series with cap feed to   
   the OPT primary. About    
   22Watts of pure class A triode is possible. Although the Futterman type of   
   driver could be used, or the Technics version which makes each series tube   
   work as cathode followers, I'd prefr an EL34 in triode with a Hammond IST, so   
   the secondary can float on    
   Vout. The driver triode then has an easy task, no need to aim for 2H   
   cancelling, and some mild GNFB would fix their minor mistakes to let tubes   
   perform more better.   
   Getting 800Vdc is easy with an existing CT winding meant for 5U4 and 400Vdc.   
   Just use a bridge with 8 x 1N5408, and two elcaps, and take CT to join of   
   caps. But I doubt I'll ever find the time.    
   Patrick Turner.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)