The Amp Garage

Hello, While I assume I could figure this out myself, it would be good to know if there are any standards or optimal space you leave on each side of a chassis. This is when dimensioning out the size of a combo or head cabinet. Thank you. Im almost ready to make my first combo cabinet with a Princeto...

I like the presence of the two High voltage coils on that toroidal transformer.

Makes it a great contender right there - and plenty of 6.3vac current available.

Thanks for the link

Phil D.

Thanks everyone, very interesting suggestions, especially on the toroidal power transformer. I hadn't thought of that as have never used one in a build. The reason for separate power transformers was based on how I initially pictured the usability of the front panel in terms of the control knob layo...

Hey thanks TUBEDUDE, I have followed that recommendation right up to the "power supply in the middle and inputs on the end". Otherwise, I have it planned out to be two completely separate amps including the power transformers, with the only common components being the AC cord that would branch off t...

Hello, Thats it. I'm doing it, and have begun collecting components and parts. I'm looking by years end to have built a little 20 watt stereo tube amp to take advantage of the nice sounding stereo pedals that are out plus, it just seems like a really cool thing to try, and to have. I'll probably jus...

Thanks Dorrisant, I think I can relax now. But there was a level or two I needed to wrap the head around to get a fuller picture of what was going on, electrically. I believe it was Martin that mentioned that what the B+mosfet reducer is doing is lowering the HT centertap by the zener drop, which in...

Thank you Martin, According to what you discovered in simulation, seeing noise at the source of the mosfet, its looks like I should leave everything right where it is, if I am in fact getting the right picture: 1. HT center tap to Mosfet source 2. Bias ground to earth grounded power ground 3. Filter...

Thanks guys for this information, This amp is fixed biases, the bias tap is a 50 volt tap off the HT coil, and the bias has both a bias level "master" and a balance, that I believe part of the Rob Robinette Blackvibe 6L6. And the bias "master" pot had to be rotated nearly 180 degrees to meet the new...

Hi RG, thanks for posting on this. I am at work now and will try to see about posting a diagram but, I always seem to fail miserably when attempting to post an image on a forum. I need to get on the stick with that. My power ground was just a small lug strip with HT centertap, filtercap returns (cat...

Hello, Something I noticed last night and got me really thinking but, not yet able to fall on a conclusion. This is about what happens to Power ground when a B+mosfet reducer circuit as drawn out by RG and company is installed as should between HT centertap and power ground. As I was going over my l...

Hello, I have a nerve inquiring on this but, would like to hear some thoughts on this. So while my mono amp builds have been really good and even very gig worthy with consistent compliments on my tones and sound, (a Plexi 6V6 and an AB763 single channel with some added features with a decent but not...

Well Stevem,

I certainly can say it generates a lot of hope in me to see a layout like that that works wonders, while knowing that I have a hell of a lot more area to park my transformers in than that. No excuse for any buzz/hum from my up and coming stereo amp!

thank you,

Phil d.

Hi Xtian. I have and will continue to see how they arrange components in terms of layout on the home stereo tube amps. What I'll need to do is figure how that will translate to a 2 x 10" speaker combo with full symmetrically laid out controls on a front panel with the standard Volume/Trb/Mid/Bass/Ma...

Actually, I take a tiny bit of this back - there is a layout I found that enables the two OT's to be moved away from each other if I moved the power tubes toward the middle of the amp, which may be just fine. As long as the decreased proximity between the PT's on the end are still OK with the OT"s h...

Hello, This is a very loose and early considered idea that I'm sure has been all done before but, in the name of compactness (or as much as can be garnered), I had a concern about what can be in closer proximity, and what needs to be distanced. So, while I'm aware of the standard rules of "PT/power ...