The Amp Garage

Jana wrote:We need detailed gut shots and voltage measurements before we can help you further.

Don't stop there. A schematic as well.

By the time this thread is done, he'll have a 4 tube Stancor-powered remote custom-painted in a Hammond #70011 enclosure covered in Amplified Nation tolex!

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cold solder prior to the return input?

I like Colossal's suggestion (can even go to 120k.) You could also change the tone stack values to alter the f of the signal to sound more raw. MFowler's suggestion of lower preamp voltage will decrease headroom but maybe that's what you're after. You could also rebias the stages to be slightly more...

Considering that my princeton transformer doesnt carry a bias tap, would the bias resistor on the switch be necessary? Are you doing fixed bias? If so, and you want to have the bias change when you switch HV taps, you might want to have the third pole on the switch and switch the bias as well - the...

RJs Eagle Supre has switchable Edcor secondaries. Schematic is uploaded. Just do a search on the forum it will come up.

Why do you have R2 and R3 in series like that? Why not just one resistor?
R1 should probably be at the pin of the tube socket.
I like C5
I'd probably reverse the two tubes as you said.
I'd put a cap across R9
I'd probably put a R between C3/C20 if you leave it as is.

Totally agree with this:

"Even though you plan on keeping the amp and not selling it, we should plan on the inevitable that when we either pass on or leave it to our kids, that it should be as safe as possible and follow industry standards such as UL and CE when possible. "

I am talking about the grid to cathode voltage being a difference of 169 volts at startup. Arcing could occur. Read the last few sentences of that link. As far as I know, even though the resistor/diode protection elements are not drawn in, Merlin suggests to have them with the bootstrapped CF (they ...

Ian, any gutshots of that VDV-3070 amp? I'd love to see the grounding scheme...

I was just trying to help. Without new pics how would one be able to adequately assist? The only suggestions I would have right now: -go over your schemo to make sure the circuit would actually work -make sure you soldered everything where it should be soldered -the 6SL7 is rated for 90 V g-k. At st...

It doesn't look like you tied your grids together on V1.

Did you verify all Ck and CCs in the signal change to see if anything was changed prior to your receiving the amp? Perhaps there's too much bass being passed through...

man, I really need to build me one of those amp cradles!

I see now. I was on my phone's small screen last night. bean, do you have the line out wired up? I'd be interested to hear your comments about how well it works to send a signal into a delay pedal then into a 2nd amp set clean to add delay to a distorted signal? Or anyone reading that's done that, d...