[sdiy] Tube amp problem

[René Schmitz]

Hi John et al. 

>You might want a current limiting resistor in the plate circuit as well.
>Personally, I don't like running all that DC current through a transformer.
>The transformer has to be really big to avoid saturation. 

Sure it would need to have an air gap, dimensioned to handle the DC current.

>I would
>capacitively couple the transformer and let the DC component warm a big
>resistor and your room. It is terribly in efficient, I know. But class A is
>always horribly inefficient. less than 16%? 

The theoretical maximum efficiency is 50% I think.

With parafeed the guys won't meet their goal of producing at least 15 Watts. 
If I'd change something I'd go push pull. With a pair of EL34 one 
can make up to 100W, but that would mean a diffrent output transformer.

Cheers,
 René


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uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159