Wanted: Composite Loadline Chart for P-P 6550 in Class A

[bob p]

I'm looking for a composite loadline chart for a pair of 6550 running in Class A. Before I spend an evening re-inventing the wheel with a graphics software package, I thought I'd ask if anyone else has already done this and has the images available.

To make life easy, I'm thinking about a simple "textbook" setup like the prototypical UL Class A setups that are listed in the GE 6550A data sheet. I'm hoping that someone else might already have this info available, so that I don't have to re-invent the wheel.

Fingers crossed, TIA.

[Satamax]

http://www.turneraudio.com.au/loadmatch1-se-triodes.html

Dis?

[bob p]

thanks for the link to the triode mode load lines. what i'm really looking for in this application is pentode mode operation, with the composite loadlines (two loadline charts superimposed, with one inverted) for push-pull operation.

[Satamax]

Hiya bob, sorry i thought i had seen it on this page. But no! It might be on that site.

Dis one may be? http://www.turneraudio.com.au/loadmatch2-se-beamtetrodes.html Or this one ? http://www.turneraudio.com.au/loadmatch4-pp-beamtetrodes.html

[bob p]

Steve Bench's web site (http://members.aol.com/sbench102/pent.html) has a good tutorial on how to draw the charts yourself. i was hoping that someone had already done it so i wouldn't have to:

sample composite load lines for push-pull development look like this chart, coutesy of Steve Bench:

http://members.aol.com/sbench102/curve15.gif


http://members.aol.com/sbench102/curve16.gif

unfortunately, what would take a normal person five minutes with graphics software will take me at least a few hours. :/