The Amp Garage

I had Hiwatt style Traffolyte panels done by a company called Furnells in London some years back. If your friend googles Traffolyte engraving uk he'll get a number of other companies, maybe one will be nearby.

desertmouth90 wrote: ↑Wed Apr 24, 2024 1:24 pm Do you recommend anything cheap?

Most people measuring voltages in these amps use Fluke. You can run into 750v AC on some transformers. So 1000v DC.. Cat II.
I use a USA Wavetek (ex BT), but do a search on here and see what folks use.

Here is the Dumble ODS 102 Build I have nearly done (Just grounding and Transfomers yet to finish/Order) I am contemplating going with 100 watt transformers as I can always switch it down to 50 watts and I think ill be ordering the Dumble style OT and PT from Tube Town as I cannot find anything in ...

Sorry I don't know about Tube Town transformers. I've used Hammond Classictone (no longer available) and Mercury (very expensive). I know folks in the USA use Heyboer. Find out who makes their ones and make the decision. Inmadout in Italy are also good. Bear in mind EU products may be subject to shi...

As for speakers, 150w Swamp Thang in Thiele cab works great or Celestion G12-65s in open back.
Many use EV 12 but I found them good only at gig volumes.

Here is the Dumble ODS 102 Build I have nearly done (Just grounding and Transfomers yet to finish/Order) I am contemplating going with 100 watt transformers as I can always switch it down to 50 watts and I think ill be ordering the Dumble style OT and PT from Tube Town as I cannot find anything in ...

Maybe a failed R/J switch that is not closing in Rock setting, resulting in PAB? Measure resistance across switch pins. As Martin says, RJ not engaging correctly results in tonestack lift ie PAB. If you put a correctly functioning RJ switch in centre position you will hear the boost. Check the wiri...

Just a quick update. I finally finished my Kleinulator on a tiny veroboard in a 125B enclosure. It was a nightmare! But I have now run all 3 effects buffers through my rig, albeit quietly at home. #183 preamp > fx buffer loop mono in out> active splitter> stereo 20 / 20 power amp > stereo 2x 10 cab....

This is exceptionally good advice, one we all followed at the beginning of our amp journey. I admire your intent to see this through, but building simple single ended circuits is a less stressful way to learn the ins and outs of of the high voltage world. This was my fire up bible back in the day, a...

I did on my EF86 SE, and 6L6 Thanks, Rog. So EL84 was your preference over 6V6? Was it a close call? I could be persuaded to switch, if that's the hands-down best tone. Planning for 6V6, my plate voltage is going to be quite a bit higher than Matt used, however. What primary impedance did you use? ...

...tried building his SE amp using 6L6's. It didn't come close to the tone Mat got using EL84's. Anybody try using 6V6? I did on my EF86 SE, and 6L6 I think I might be finally done on this project!!!!!!! Today I added a 470R and 47uF to the octal cathode pin 8, rather than running both sockets (sep...

The 20/20 must be pretty crowded inside, maybe a bit hard to work on? My project is a single ended amp, so no PI. I don't know if I'll miss it since the Dumble power amp is pretty much a clean Hi-Fi type. It's a bit of an experiment, so I'll just have to see how it turns out. The preamp is a copy o...

This project has been on the back burner for a while, but now making progress in the last couple of days stuffing the boards. The main board was made by Tony D from my drawing, FET board is my KiCad design, fabricated by PCBWay. Second photo is test-as-you-go in the extreme; HV power supply no-load...

This project has been on the back burner for a while, but now making progress in the last couple of days stuffing the boards. The main board was made by Tony D from my drawing, FET board is my KiCad design, fabricated by PCBWay. Second photo is test-as-you-go in the extreme; HV power supply no-load...

I have been corresponding with Nik, who btw is extremely helpful and service minded towards his customers. However we've progressed far beyond that correspondation in troubleshooting here. He can offer me a good deal on Mercury Magnetics. I'm having some troubles with the PT on my second hand OTS a...