audio-talk

Interesting fusion I just found.

I would also try standing signal ground off safety ground with another 100R (maybe with a bipass cap), see if that removes the need for transformers at the front.

The pair of 100R to ground on the heater supply may still be worth doing.

I thought this was an interesting piece on Don Garber and Fi, and the NY valve scene back in the day. It really made me wish I could find my Sound Practices CD. https://jeffsplace.positive-feedback.com/in-remembrance-of-don-garber-an-american-audio-master-1935-2017-godspeed/ Google is your friend h...

MistyBlue wrote: ↑Mon Aug 26, 2024 11:44 am Thanks for the tips guys, very much appreciated!

Quasimodo looks like a great little tool. I had a quick look at the thread and will have a look at getting some PCBs done. Probably SMD. I will remove those bypass caps as suggested.

I think I have away the last of the batch I got made. Sorry.

My only contribution would be to remind you about 866's as an alternative to U19.

Reading the page, I think its saying the power analyzer is accurate to that, its just a conditioner not a re-generator. I will see if Dave has two of them in stock. Would be fun to run two in series and see if the numbers are any better for the second one :-) I must stop looking on ebay https://www....

Ok, so jitter would look like a constant correction over the 360 deg of the sine wave. Brownouts would not be what this is trying to correct. Its not intended to be a UPS replacement. The control system would have an idea of the largest correction it will try and fix, and give up after that point an...

From the text I posted: Take the input 50Hz, use that to create a lower distortion noise free version synchronized with the incoming mains. The phase shift was why I then suggested a DC coupled amp riding on the AC. The reference signal can be delayed by one cycle anyway without it being any less a ...

Yes I know. I sell a product that does exactly that with a view to powering turntables. My thought about just correcting the distortion was one of efficiency. For most usage cases the benefit can be had by not correcting frequency just distortion and noise.

Does it work the way I suggest or just generate the supply from DC? The HP mains source for example generates the output from scratch. My idea would just need enough power to correct the distortion. Could supply 13A without needing a huge amplifier and transformer. May be better done having a DC cou...

Still got the 211 amp. Not the first one that was a two box amp, well, a box and a sheet of chipboard with bnc's between them.

Its probably a silly idea or something that's known and done. But I was thinking about a active mains filter similar to the sketch. Take the input 50Hz, use that to create a lower distortion noise free version synchronized with the incoming mains. Then use that as the reference in a feedback loop to...

Eimac went further than fans. Forced air and water cooling was in use for most of their range by the 70's (there were only two radiation cooled valves).

I think some of the later pages describe application of both of your suggestions.

I have to admit I normally lose the will to live after a couple of pages on diyAudio.