The Amp Garage

Thanks for your helpful answers. The store I usually buy my parts from no longer sells the gauge wires I feel comfortable with, so I was wondering if I should look elsewhere for a suitable wire or try the 24AWG teflon wire they recommend. I have taken to matching the gauge of the heater winding for ...

I would like to ask what gauge is appropriate for the wire used in the tube amp heater. As a result of searching, it seems that there is no clear conclusion that a specific specification is good or bad. As the gauge gets thinner, the resistance increases and heat is generated, and it seems that the ...

pdf64 wrote: ↑Wed Jun 19, 2024 11:16 am I recall reading an interview with him somewhere, maybe this, it's quite entertaining https://guitar.com/features/interviews/ ... -designer/

Oh, this is very interesting. There was a hidden hero who changed the times. Thanks for sharing!

I would like to add just one question. Dirty Shirley's PI circuit is almost identical to Marshall JTM or Plexi, but the grid resistors are not matched and has different values. I think this is my first time seeing a circuit with different values here. There is a double difference of 1M / 470K each. ...

I built a DS with JTM45 Iron,so my B+ is about 440v . No problem with those 500v caps. Wouldn‘t try that with 470v on the plates though. 2 Caps in series is the solution, you may try 70mf/350v. 16/16mf is fine for the TS Thank you for sharing your experience. I need to think a little bit about whet...

I'm considering make Friedman Twin Sisters. I heard it's an amplifier made up of two Dirty Shirley preamps, and whether that's true or not, I'm trying to make it that way. This is the most visible and detailed circuit diagram I've found. Dirty Shirley Schematic 1.jpg In the circuit diagram, B+ and B...

That isn’t going to work because the grid can’t be lifted from a 220k leak to a 2M2 leak resistor no matter what. It has to retain the 220k resistance whether it’s a parallel of the MV control or a fixed resistor. It’s going to pop loudly also because it’s an open circuit while the contact switches...

I thought this switching wouldn't break the amp at least, so I tried it on my Deluxe Reverb clone. 01.jpg It works very well as expected. Of course there is pop noise. But it's not as loud as I think. By my standards, it feels like it is sufficient for the purposes I mentioned. (footswitchable chann...

LAR/MAR PPIMV bypass pop noise? I am reviewing the Ton King Imperial circuit. This amplifier has a built-in attenuator, and there is an option to have the attenuator operate only on the lead channel when switching channels. I think this is a very good idea. Since this is an amplifier without a maste...

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 electroly...

ok slowly, education no need to be high, self yes, practice is more important to develop what to put where, but build fundaments before. read at least this book, and many answers you can find there about tube operations and then proceed with experiments https://www.lulu.com/shop/merlin-blencowe/des...

@psichepool sorry to be direct and realistic, but high gain amp is the most complex amp what is existing and you need to be very experienced to handle this.. pls buy some books first and read about the tubes..you are just jumping the steps with holes in knowledge.. you are falling on basics like gr...

That’s not what the first reply to your post was questioning. You referred to a 12AX7 as a pentode when it’s not, in fact the whole large number of the 12A series of tubes ( 12ax7 av7, au7, at7 and others) are all duel triode tubes. They can perform 2 separate amplification functions in other words...

say what??? I guess the sentence was unnecessarily complicated. What I mean is that I want to configure a preamp using a total of three 12ax7s. I am making amps in a small chassis of the same size, and there is not enough space to increase the number of tubes, so I want to make it with as few tubes...

Thank you for your all reply. At my level of knowledge, I don't think there is anything I can easily understand or try. Because I always do tight builds, if there is a problem with the transformer, I have to dismantle all the internal parts to replace it with a new one, so I am careful. Using EL34 i...