Search found 4 matches

by JMan
Fri Feb 21, 2025 8:47 pm
Forum: Transformerless VariMu
Topic: JMan's Completed Unit
Replies: 2
Views: 19154

Re: JMan's Completed Unit

Thanks! Yes, it's a 4u case. Orienting the sidechain controls vertically like I did didn't quite allow for a 3u enclosure, and I stuffed so many other things behind that front panel that I could not have gotten away with anything smaller. I just tell myself, "it's okay, this means the tubes are not ...
by JMan
Wed Feb 19, 2025 4:52 pm
Forum: Transformerless VariMu
Topic: JMan's Completed Unit
Replies: 2
Views: 19154

JMan's Completed Unit

Thanks for this amazing project, Heikki! I added a few little bells and whistles of my own. You've given us something truly outstanding here!
Xfmr-less Varimu.jpeg
Xfmr-less Varimu.jpeg (2 MiB) Viewed 16790 times
Xfmr-less Guts Shot.jpeg
Xfmr-less Guts Shot.jpeg (3.26 MiB) Viewed 16790 times
by JMan
Tue Feb 18, 2025 1:02 am
Forum: Transformerless VariMu
Topic: Power Supply
Replies: 5
Views: 43036

Re: Power Supply

Thanks Heikki! I hooked it up to the load and the noise disappeared.
by JMan
Tue Feb 11, 2025 4:22 am
Forum: Transformerless VariMu
Topic: Power Supply
Replies: 5
Views: 43036

Re: Power Supply

I powered up my PSU to check voltages this evening, without A+, B+, or +/-15 hooked up to anything on the other boards. After a few seconds, I got a very audible high frequency whistle. I guess this was oscillation. Could this be because I did not have it connected to a load? The voltages themselves ...