Friedman Twin Sister Circuit?

[cdemike]

If you go to the thread linked on the first post you'll find the schematic at the bottom of the first post.

[Chalky]

Many thanks!

[Bobbytouche7]

Late to the discussion here, but I’m building a Little Sister and, after hours of staring at gut shots, have solved this mystery. The DPDT Bright/Tight switch, when ON, adds a 0.0022uF coupling cap in series after the 0.022uF coupling cap after the second gain stage. It also adds a 0.68uF electrolytic bypass cap in parallel with the 820R cathode bias resistor on the the third gain stage. When Off, the switch shorts around the 0.0022uF and adds a 1M resistor (to ground) in series with the 0.68uF cap.

*DISREGARD* I’ve started a new thread so as not to hijack this one.

I’m trying to do what I believe to be exactly this to my DS 40. I’ve got some detailed pictures of the insides of mine which has the later pcb. Would you or somebody be willing to draw up a quick diagram? I’m horrible with schematics and written instruction (I proved it in school), but give me a diagram and I’m all over it. Lol.

Sorry for resurrecting an old topic.