Happy to do it. If there's anything else specific that would help anyone or provide ideas, I'm happy to post.
That's also why I love differential signaling. Super quiet. In fairness, with a few amps, it does seem to maybe take away some of the H2 "magic", but it's fun to play with.
I've seen Ben post some tips re: measuring PSU noise. When I get some time, I may give it a try.
Correct. I was measuring "amplifier noise" vs. PSU noise. I'm not sure of the PSRR of the A60.
Thanks! Awesome tip.
That's also why I love differential signaling. Super quiet. In fairness, with a few amps, it does seem to maybe take away some of the H2 "magic", but it's fun to play with.
I've seen Ben post some tips re: measuring PSU noise. When I get some time, I may give it a try.
On another note I have had some buzzing even from the best of transformers the past couple of years. So I bought a Toroidy DC blocker for testing, which arrived today. A big difference, even with that huge PSU depicted a few posts back. And no, snubbers not installed - yet. But I guess those tranniecores were saturated (not in a sexual way). Gonna do some more listening and measurements of the wall outlets different times of day. But I am not parting with that blocker now!
Would be cool to make a complete PSU board with room for it all, including a DC blocking circuit. Need to learn KiCAD, soon. Too many thoughts, no fruition.
What are the differences? Tighter and more articulated bass, and a better soundstage. Cleaner, sharper but in a good way. And better tonality. This with a AJ MZM amp.
Would be cool to make a complete PSU board with room for it all, including a DC blocking circuit. Need to learn KiCAD, soon. Too many thoughts, no fruition.
What are the differences? Tighter and more articulated bass, and a better soundstage. Cleaner, sharper but in a good way. And better tonality. This with a AJ MZM amp.
I know. This time I wanted to know I needed it before building anything new (time vs greenhornynezz). But I would preferably like it inside the chassis, hence the idea of a complete pcb from secondaries to outputs with all bells and whistles. Would be cool.
But first I need to build my long awaited choke input supply
I know I know, better off quitting.
Is there DC in Serbia?
But first I need to build my long awaited choke input supply
I know I know, better off quitting.
Is there DC in Serbia?
I could try to answer this . When current flows through an inductor it creates a magnetic field . Inductors store energy in a magnetic field .
But then that magnetic field turns around , an opposes any changes in the current .
So if a large choke were connected on the hot , before the primary side of the transformer , the choke would oppose any sudden changes in current
needed by the transformer.
However , there are 2 types of noise on the Hydro - Common Mode noise and Differential mode noise .
Here is an explanation of a common mode choke - designed to be connected before the primaries .
https://www.mouser.ca/datasheet/2/54/8100_series-777217.pdf
Many EMI filters are designed to stop switch mode power supplies putting noise back on the Hydro .
So for many commercially made EMI filters , you'll see caps connected between the Hot and Hydro Earth
and the Neutral and Hydro Earth .
But with audio equipment , the EMI filter should be designed to stop common mode noise reaching the primaries .
IMO Hydro Earth is quite noisy , and its NOT to electrical code to have a dedicated Hydro Earth for an audio system .
A residence should only have 1 earthing ground .
As such , IMO its best not to connect caps between Hot and Earth , and Neutral and Earth .
You'll notice the designer of the fo felix does not connects these caps .
https://www.diyaudio.com/community/...ilter-for-ac-mains-120-230v-by-folsom.321223/
.
Thank you! Very interesting. See this article from Pa & co, page 2: https://www.passdiy.com/pdf/powersupply.pdf
He suggests both inductors and caps, and mere inductors @ the primary side. Of course, putting them on the secondaries will make it a choke input supply with it’s own design challenges.
He suggests both inductors and caps, and mere inductors @ the primary side. Of course, putting them on the secondaries will make it a choke input supply with it’s own design challenges.