[Amps] Filament transformer question

[Vic K2VCO]

jonathan white wrote:
> Hi All.
> Can someone clear up a point regarding centre tapped filament transformers.
> I am having one wound for my 4x 813 amp,where I need 10v at 20amps.
> I told the winder, and he wants clearing up does it mead 5-0-5v ,or 
> 10-0-10v and bias via a G3SEK board, to centre-tap of transformer.(I 
> thought it was 10-0-10volt) so maybe its time for me to wear the dunces 
> hat! Im just used to 6.3/12volt heaters.

The 813 requires 5-0-5. The 10v total is applied to the filaments and the CT goes to the bias.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco