Recent Posts

91

Tube Amp Building - Tweaks - Repairs / Re: Bias Help for Rob Robinette JCM800 6V6

« Last post by rud85ny on July 18, 2026, 12:41:19 pm »

Sorted out some gremlins, back to report some positive news!
I shifted the 6V6 tubes all the way left since Im not using a rectifier tube. This cleared up the power switch wiring and makes things more tight.
Amp is done, the Bias setup worked great... BUT my amperage draw is a bit low when maxed out at 18ma. I might drop the 47K resistor by10K. [Correct me of I'm wrong]

My plate voltage is hovering around 377VDC when warmed up and peaked at around 400VDC when cold so my current draw should be around 20ma-25ma.

I hope this thread helps anyone whose building one of these amps. Please comment on things that can help me make this amp better! Cheers!

 

92

Tube Amp Building - Tweaks - Repairs / Re: Single tube Reverb headache

« Last post by acheld on July 18, 2026, 12:13:04 pm »

Not to pile on, but I too have used Doug's grounding scheme successfully.

As for an authoritative discussion of layout and grounding, this is the best there is:  https://www.valvewizard.co.uk/Grounding.pdf

Merlin writes exceptionally well and is easily understood with lots of great illustrations.

93

Tube Amp Building - Tweaks - Repairs / Re: Single tube Reverb headache

« Last post by Willabe on July 18, 2026, 09:09:47 am »

When I first started building, I read books that recommending star grounding when possible, and I got into the habit of designing all my builds that way.

Who's books?

94

Tube Amp Building - Tweaks - Repairs / Re: Princeton Reverb circuit refinements

« Last post by Willabe on July 18, 2026, 08:57:47 am »

i have a new accutronics tank that i heard are not that good anymore.

What do you mean not good, how so?

 

95

Other Topics / Re: Meme of the day

« Last post by shooter on July 18, 2026, 07:54:57 am »

...

96

Tube Amp Building - Tweaks - Repairs / Re: Standel 25L15-Do you like it as is or would you like to change something

« Last post by wsscott on July 18, 2026, 06:25:26 am »

Good advice!

97

Tube Amp Building - Tweaks - Repairs / Re: Dave Hunter's 2 Stroke and output tranny/speaker options

« Last post by sluckey on July 17, 2026, 09:02:33 pm »

I never thought you meant any disrespect. But once is a typo. Twice is just lazy. At least you didn't call me "sucky". 

98

Tube Amp Building - Tweaks - Repairs / Re: Dave Hunter's 2 Stroke and output tranny/speaker options

« Last post by NotSure on July 17, 2026, 08:55:51 pm »

So sorry man, not trying to disrespect anyone that provides the help that comes from this site. Just a typo. won't happen again.

99

Tube Amp Building - Tweaks - Repairs / Re: Dave Hunter's 2 Stroke and output tranny/speaker options

« Last post by sluckey on July 17, 2026, 08:47:48 pm »

I've never seen anything from Slukey or HotBluePlates that have steared me wrong.

My name is SLUCKEY! That's not so hard to type, is it?

100

Tube Amp Building - Tweaks - Repairs / Re: Dave Hunter's 2 Stroke and output tranny/speaker options

« Last post by NotSure on July 17, 2026, 08:42:00 pm »

  you all are the best. I've never seen anything from Slukey or HotBluePlates that have steared me wrong. So your response is way beyond my pay grade.