The Amp Garage

You are probably getting oscillations by removing that tone stack and probably slamming the grid. Also need a coupling cap as previously mentioned. Calculate the amount of db loss usually obtained by the tone stack and match it with a T voltage divider before the Level, R43 is kind of redundant, C25...

That schematic is fairly close to the D'lator but for me, since HAD designed the D'lator as a companion buffered loop for his ODS amps, I trust his design to work and sound better than just about any other design. If you want to build the loop inside an existing amp, shouldn't be a problem as long ...

My Alessandro Doberman has Radio Interference - both local and on stage. I use a pedal board with multiple effects. Doesn't happen when not plugged in. Whats puzzling is that I also have a Silverface Twin and this never happens to this amp. I also have a Marshall 2104 which does pick up RF but to a...

You need to put some tubes in
I should have read your last post first LOL

I listened to the recordings. Have you tried JK's attenuator in-person with a real guitar and amp? When and if you do, I suspect that you will no longer be as impressed by the recording. This has been my experience, FWIW. The JK attenuater actually sounds very good, I have heard the Faustine which ...

Structo wrote:Just call it a Bumble.

Can somebody hand me a Kleenex? Oooops, I mean a paper tissue.

Hey like 15 years ago I turned a boogie in to a dumble and called it a Bumble

Thanks, all... I still can't find the picture I was thinking of. It was darker, a head on a 4X12, I think. And the name on the front panel started with an "X" or perhaps a "V"... I'll live if I can't find it, but it looked very cool, indeed. Something I'd like to try... Bob [img:450:209]http://www....

My previous thread.. http://ampgarage.com/forum/viewtopic.php?t=12110&highlight=hum I have done a couple of things to try and fix this hum problem. #1 I took out my input selector switch and I took out the hum balance pot so everything is original to specifications. The next thing I did I went to t...

Interesting that on an "Ultrphonics mod" he spaces the OT transformer away from the chassis with a thick shim. So he must think there is something to it, or maybe just a quicker way of getting components/wires further away from the OT. Have also understood that because a steel chassis is ferromagne...

krash wrote: I also don't mind using Xicon resistors. .

Soldano and many other manufacturers had major failures with Xicon 1/2W MF 100K resistors.

I'm building my first aluminum (anodized ) chassis amp. The grounds are soldered to ( tinned? ) ring connectors and bolted to sanded areas on the chassis. Am I going to have to worry about/deal with the aluminum oxidizing and screwing up the grounds? Kind of like houses with aluminum wiring? Should...

Is there any negative effects of having the PT and OT right next to eachother. I see that on most amps they are on opposite ends of the chassis. But the chassis i have has them right next to eachother and i'm afraid this will have negative effects on the sound. Any input will be great You can easil...

Attached is a drawing of 4 styles of schematic diagrams for possible 3 button footswitches, I am working with Michael at Cliff USA to see if we can get these made. So pick which style would be the most desired for a production run and we could all benefit. Any of these would be acceptable for my pu...

I am building an amp with a donated traynor PT. I am getting a plate voltage of 530Volts. I am assuming that this will kill 6L6GC's. Is there a meathod of lowering the voltage to 450? Should I switch to EL34's? If so the screen can only take 425v....how would I lower the voltage before it hit the s...