Two Rock Power Supply Question

[mhartman]

I have a question about the Two Rock power supply setup. I was studying a picture of a classic reverb that I saw around here a while back (basically, a 100W clean skyline tonestack with reverb) and I was stumped when I was looking at the power supply. I've attached a picture of it below.

It looks like "A" is the relay supply and "B" is the Bias supply, but I was confused about "C" and "D". Typically, I would only expect one more supply to power the power tubes/OT, reverb driver/transformer and preamp plates, but here there are two. It appears that "C" and "D" feed off of separate taps from the PT. Anyone know what the setup is here?

[PaisleyTube]

fotootje v/d draden zou helpen

can you post some more info/pics about the wiring going to that board?

[mhartman]

fotootje v/d draden zou helpen

can you post some more info/pics about the wiring going to that board?

I'm on my phone surfing, but this thread shows the full classic reverb and JM, both of which have this power board:



http://ampgarage.com/forum/viewtopic.php?t=15705

Thanks!

[PaisleyTube]

it's very hard to see, with a slightly better pic I'll give it a try later on or next day

[mhartman]

Thanks. Maybe high & low power to the power tubes based on high and low voltage taps from the PT?

[brentm]

50 watter... wrong version, incomplete drawing done by other members on this forum. But this might help...

http://zoom.it/cFJH

[mhartman]

50 watter... wrong version, incomplete drawing done by other members on this forum. But this might help...

http://zoom.it/cFJH

Thank you, that helps a lot!

[mc41]

Hi,the "D" on the picture is a different rectifier from the PT for the reverb..In the custom reverb it is b+>choke>screengrids > PI > OD > IN with a 10K from PI for the reverb driver..In the classic reverb i think the MiX tube replace the OD and the "D" rectifier is for the "Send/Return tube..