Recent Posts

31

Tube Amp Building - Tweaks - Repairs / Re: Any tips for taming a wild 5E3?

« Last post by sluckey on June 09, 2026, 02:02:53 pm »

I'm actually quite satisfied with Robinette's 1/4 Power switch

Clever!

Da Geezer has another clever circuit that operates by manipulating the bypass caps on the output tubes. Very effective. See page 7 of my amp scrapbook.

     https://sluckeyamps.com/misc/Amp_Scrapbook.pdf

32

Tube Amp Building - Tweaks - Repairs / Re: Any tips for taming a wild 5E3?

« Last post by passaloutre on June 09, 2026, 01:31:35 pm »

What speaker do you have in it? Too loud is a common problem for people thinking a 5E3 is crankable anywhere except on a stage, especially with most guitar speakers.

I'm actually quite satisfied with Robinette's 1/4 Power switch: https://robrobinette.com/5e3_Modifications.htm#Quarter_Power_Switch

I have it mounted in a little box inside the back of my cabinet so I can switch from practice mode to stage mode.

I also really like my 5D3 Deluxe with an inefficient 10" speaker. That one is crankable in the garage.

Edit: I see you mentioned the Celestion Creamback, which is 97db. If you go to a Jensen P12R or P12Q, at 94db, it'll sound like half the watts. If you want to keep the British sound, Celestion also make the "Peacekeeper", with a sensitivity of 86db!

33

Tube Amp Building - Tweaks - Repairs / Re: Any tips for taming a wild 5E3?

« Last post by slim66 on June 09, 2026, 01:19:46 pm »

Thanks.  Volume pot taper is audio.

Voltage survey:

V1

pin 1. 176.9
pin 3. 1.23
pin 6. 169.2
pin 8. 1.23

V2

pin 1. 153.1
pin 3. 1.2
pin 6. 194.8
pin 7. 14.65
pin 8. 39.12

V3

pin 3. 319
pin 4. 294.1
pin 8. 16.27

V4

pin 3. 316.7
pin 4. 295
pin 8. 15.93

B+

1.  323.6
2.  293.5
3.  233.7

Thanks again.

Slim

34

Other Topics / Re: Meme of the day

« Last post by shooter on June 09, 2026, 11:39:10 am »

...

35

Tube Amp Building - Tweaks - Repairs / Re: Tube Preamp SMPS

« Last post by Jonas on June 09, 2026, 08:51:17 am »

thanks Pete and nice job! - I will give that a try

Are you getting any noise form the 6.3v heaters?

I an not using the on-board dc jack, wiring direct (tried to upload a pic no success - attachment options is not working for me???)

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Tube Amp Building - Tweaks - Repairs / Re: Tube Preamp SMPS

« Last post by Jonas on June 09, 2026, 08:47:46 am »

test

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Tube Amp Building - Tweaks - Repairs / Re: Any tips for taming a wild 5E3?

« Last post by pdf64 on June 09, 2026, 08:19:08 am »

Voltage survey?
Volume pot taper?

38

Video Clips / Rush "Fifty Something" Tour at Kia Forum Inglewood LA 7th June 2026

« Last post by Rontone on June 09, 2026, 08:00:23 am »

Decent audio, their new drummers awesome

39

Tube Amp Building - Tweaks - Repairs / Re: silvertone 1484

« Last post by passaloutre on June 09, 2026, 07:59:06 am »

Mojotone used the 6CG7, and EHX still make one.

40

Effects / Re: Safety / Filtering Capacitors across the Primary on mains powered effects

« Last post by Rontone on June 09, 2026, 07:09:49 am »

Just trying to be lazy and get away with it 

But does seem its best for tape motor devices, I have a lot with short legs intended for PCB so they won't quite squeeze on there,

I've ordered some Class X2 68nF with long leads to replace this old 50nF which is an early 70s Erie Duolectric which probably could fail short