Recent Posts

1

Tube Amp Building - Tweaks - Repairs / Re: Combining Stout TMB + Stout Reverb

« Last post by martinman on September 14, 2026, 06:20:02 am »

Thanks everyone.  I *knew* someone was as interested in this as I am! 

Any chance you can point me to a layout?  I can read schematics, but doing the translation to a board...  eh. gonna get it wrong for sure. 

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Tube Amp Building - Tweaks - Repairs / Re: First amp build

« Last post by AlNewman on September 13, 2026, 11:54:11 pm »

Those voltages don't make much sense.

If it's motorboating or squealing, you can try switching primary leads of the output transformer between the 2 plates of the output tubes...

3

Tube Amp Building - Tweaks - Repairs / Re: THE HOWLER

« Last post by dogburn on September 13, 2026, 09:27:22 pm »

Wow - very professional, and they have their own distinct look (which is somewhat rare these days).

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Tube Amp Building - Tweaks - Repairs / Re: First amp build

« Last post by Mongrel714 on September 13, 2026, 07:41:00 pm »

On the pre amp:
Pin 1- +143vdc
     2- +0
     3- +6v
   4&5- 3.4vac
     6- +235vdc
     7- +0
     8- +13v
     9- +3.4vac
EL84
Pin 1- 0
     2- -15vdc
     3- 0
   4&5- 3.4vac
     6-0
     7- +370vdc
     8-0
    9- +365vdc
I didnt get the phase inverter numbers as it was Motorboating, pulled the PI tube and it stopped, so either pre amp or PI section?

5

Other Topics / Re: Meme of the day

« Last post by shooter on September 13, 2026, 06:00:34 pm »

....

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Tube Amp Building - Tweaks - Repairs / Re: First amp build (5F1) would anyone mind double checking my turret board layout?

« Last post by Platefire on September 13, 2026, 02:58:28 pm »

Some of us hike up the value of those power rail filter caps to get rid of the original Fender F51 humm. Think I went to 22/10/8 and it still remains a little humm

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Tube Amp Building - Tweaks - Repairs / Re: THE HOWLER

« Last post by Platefire on September 13, 2026, 02:47:05 pm »

Wow! I Like!!!

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Tube Amp Building - Tweaks - Repairs / Re: First amp build

« Last post by Mongrel714 on September 13, 2026, 12:57:36 pm »

12  12AU7 !!!
They used a lot more heater current than your design.
Check heater AC voltage on your build. If it's too high, you might have to use big power tubes or another alternative to use up excess heater capability.

Im showing 3.4vac on the heater legs, and yep Ill probably need to move up to 6V6s if the Sluckey design does not work.

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Tube Amp Building - Tweaks - Repairs / Re: Combining Stout TMB + Stout Reverb

« Last post by dogburn on September 13, 2026, 12:57:02 pm »

I made an 18W EL84 powered amp on a Hoffman Stout TMB board. I also went with a one-tube reverb and the post-PI volume mod.  I think it turned out well.  Nice cleans and power but with lots of growl on board when required.

I built a Princeton Reverb, and used one-tube reverb based in part on the schematic Lectroid posted, so I can vouch for his approach and schematics.

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Tube Amp Building - Tweaks - Repairs / Re: Combining Stout TMB + Stout Reverb

« Last post by Lectroid on September 13, 2026, 11:56:01 am »

I made an 18W EL84 powered amp on a Hoffman Stout TMB board. I also went with a one-tube reverb and the post-PI volume mod.  I think it turned out well.  Nice cleans and power but with lots of growl on board when required.