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2203-clone: voltages?


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8/15/2000 10:23 PM
Gerben
 2203-clone: voltages?
Hi!  
 
I’m going to build a 2203-clone from scratch (and mod the hell out of it :-)). What I would like to know: What are the voltages to shoot for on the pre-amp tubes. I gathered some info from GT’s Tube Amp Book, and from the schematic of the Pignose G40, and I would like to know if these voltages are good starting points.  
 
So,  
 
V1a plate 210V  
V1a cath 1.75V  
B+ 280V  
 
V1b plate 250V  
V1b cath 2.6V  
 
V2a plate 165V  
V2a cath 1.0V  
 
V2b cath 167V  
B+ 290V  
 
V3a plate 220V  
V3b plate 210V  
V3a+b cath 37.5V  
B+ 330V  
 
Any input is most welcome!  
 
Thanks,  
 
Gerben
  
8/16/2000 4:30 AM
BWilliamson
quote:
"I’m going to build a 2203-clone from scratch (and mod the hell out of it :-))."
 
 
well then--thought of this while reading your post......  
 
Seperate 6.3V transformer for the filaments.  
Big honkin PT--just glancing thru a catalog. A Hammond 278CX(400-0-400 @ 465ma). Guess your gonna need a variac and you got ALL the voltage range you could handle. Have to lug that variac all around with you and work with 2 power cords--or this could be a "Prototype"-yeah-baby.  
 
too much--nah  
 
bw
  

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