The Amp Garage

I'm currently building the one I posted. Not interested that much on the Stereo version (probably sounds great, but overdrive is on a higher ranking among the desirable things I want to add to the amp), thanks for the suggestion anyway.

Will report the results.

Hi guys, Recently I bought a Heathkit Electronic Crossover XO-1 that uses a couple of 12AX7 tubes. My idea is to build a dumbleator on it. I was wondering if it could be possible to use the extra tube to add a switchable overdrive stage within the loop. I'm planning on using the unit with a Wonderla...

Hi guys, I have a somehow odd question. Recently I bought a Heathkit Electronic Crossover that uses a couple of 12AX7 tubes. My idea is to build a dumbleator on it. I was wondering if it could be possible to use the extra tube to add a switchable overdrive stage within the loop. (I still have to rei...

Hi Sluckey,

Thanks for the feedback, thought it was appropriate for the job, not really an expert on the field. So for now I'll keep the mods on stand by.

What would be a good switch for that purpose?

Thanks.
CE

I have one of this: https://www.amplifiedparts.com/products ... 4-position.

I would probably duplicate the pentode option on the 4th position to avoid potential problems. Or what other option would be interesting to implement with the extra pole?

I'm using a Twin Reverb 135 UL OT on my build.

Thinking about puting a switch on the back for Pentode/Triode/UL modes.

I think the UL mode hasn't been tested yet, Am I right about that?

Great thread by the way.
CE

I was wondering about the two "dirty" switches on the Dirty Wonderland (somebody asked before about it on the thread), Taylor's answer was about negative feedback lifts. So basically one would be a LNFB on the second gain stage and the other a GNFB? I was thinking on adding a GNFB switch to the amp,...

Hi, A couple of weeks back I finished the build. Completely surprised with the sound of the amp. Had a lot of expectations about it, and it definitely doesn't disappoint at all. Right now I'm running at 50W with 2 output tubes. (I'll be ordering a matched quad next month). Haven't connected a Strat ...

Hi Ryan,

Thanks for the answer, I'm checking your thread on the amp, nice information over there!. I'll replicate the specified ground points.

Cheers mate.
CE

Is there a particular reason for the ground points marked as Ground at Send/Receive? Where is located that ground point?

I was thinking on grounding all filter caps at the same point.

Hi, Recently I acquired a late 80's Fender "The Twin" which has a double pot BIAS calibration system that works pretty well for setting the value and balance between the push-pull sections of the power amp. I would like to implement that type of topology on the amp. On the photos you can find 1) The...

Ok guys, thanks for your answers. I'll stick to the original plan and build the amp. I don't want to think about relays switching right now. I read on some other threads about a built in dumbleator having a positive result in the overall sound of the amp, with the added benefits of the improved effe...

Hi everyone, Starting my second build after a Marshall Plexi 18W that came great. I have a Twin Reverb 65 RI chasis with PT and Reverb Transformer. with a late 70's Ultralinear OT that I'm planning to use without the UL taps. The twin comes with an extra 12()7 tube. I was wondering if I should use t...

Hi everybody. I have a Fender Twin Reverb 65 RI Chasis and Transformers available for a build. I was wondering if I could build a Hiwatt 50W amp on it? Sorry if this looks like a ridiculous question. I know the TR's Transformers put quite high voltage on the circuit that could work on the Hiwatt con...