peter - winged C's distortion rating ??

[slate]

peter ,
when i asked for svetlana winged C EL34's for my einstein with the "late distortion " rating , the biggest tube dealer here in england told me that there was "no such thing" , and that this "early/mid/late distortion" rating was used for groove tubes only .
although he did say that the "GM" could be set to a similar rating ...

i have absolutely no idea what this means , or even whether it is important or not .

is he correct in his statement , and if so , should i have him set the "GM" to any specific level that would equal "late distortion" ( as you mentioned in your thread entitled "announcement" )?

 

[Peter Diezel]

Your dealer is right.

 

[slate]

thanks peter - if he's right , then why did you post this in the "announcement" thread ?
"Please go with the late distortion rating.
These tubes have the best quality."

 

[Peter Diezel]

That was related to the Groove Tubes thing.
It has to do with the amount of bias current.
Order simply "normal" SED´s.

 

[slate]

okay - thanks

 

[diezelboy]

What about the Ruby EL34BSTR? What PC # reading is ideal? Does the late/early/medium distortion rating apply to the Rubys?
Looking at http://dougstubes.com/el34.htm there's rating options for the EL34BSTR.
Thanks