ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

Loadlines - don't get it!

9/26/2000 3:37 PM
lion	Loadlines - don't get it! I'm still considering my next amp project, but I need some assistance. Say, I wanted to build a AC30 clone - that is, a cathode biased, ZNFB, class A poweramp, but with 4xEL34's instead of EL84's. (I know class A in this case means, biased hot in class AB1. I'm not trying to prolong the amp class debate). How would I translate the AC30 specs - plate voltage, bias point, drive voltage, OT prim Z, ect - in order to drive a quad of EL34's in a similar maner as the EL84's are driven in a AC30. Loadline talk is beyond my skills. Any assistance or advise will really be appriciated. Regards Lion

9/26/2000 3:37 PM

lion

Loadlines - don't get it!

I'm still considering my next amp project, but I need some assistance.

Say, I wanted to build a AC30 clone - that is, a cathode biased, ZNFB, *class A* poweramp,
but with 4xEL34's instead of EL84's. (I know *class A* in this case means, biased hot in class AB1. I'm not trying to prolong the amp class debate).

How would I translate the AC30 specs - plate voltage, bias point, drive voltage, OT prim Z, ect - in order to drive a quad of EL34's in a similar maner as the EL84's are driven in a AC30.

Loadline talk is beyond my skills.
Any assistance or advise will really be appriciated.

Regards
Lion

Replies:

Don Symes I guessing here, but look at the tu... -- 9/26/2000 8:37 PM
Jim S. Don't forget that you'll need to ch... -- 9/26/2000 9:47 PM