My take on a discrete shunt voltage regulator

[ikoflexer]

I've had that experience with J201 as well. Usually some mishap with the probes in the running circuit or with the soldering iron. Sensitive little ones.

[Greg Erskine]

Originally Posted by HiFiNutNut

The sound seems to be even a little more cleaner. Note that it was already very clean.

Yes, most of us can only dream of having a system half, no a quarter, as good as yours.

[HiFiNutNut]

Greg,
I am flattered! You have to come and listen to my new system, which shall be ready in the next 4 weeks, it should be much better than the one you listened to before. Bring your amps and stuff too.
Regards,
Bill

[ikoflexer]

For yet another test I've just finished another sample of revision 5k, this time air sculpture, which is my favorite way to prototype. This one worked out of the box, so to say, no artifacts of any kind. Used a 33uF electrolytic at the output, a 220uF to bypass R9 and R11 (27k, got 11.1V output). Took a bit long to get to 11.1V, perhaps 90s or so. I think a 47uF to 100uF should be better there. Once it gets to the output voltage the current is stable, the voltage is stable, good stuff!

No listening tests yet as far as I'm concerned, so I thank Bill for all the input in that department so far. It's good to have someone with nice equipment and a good ear test it.

Incidentally today I also put a couple of solid hours into the positive 5k pcb design, which is now finished, but I want to go over it with a clear mind another couple of times just to make sure there's no funny stuff. We're getting there...

[qusp]

Originally Posted by ikoflexer

Test it and please let us know how it went.

will do when the PCBs arrive, too far gone on other projects currently to do any more prototyping. I actually meant 100NF/10NF rather than pf

[Telstar]

Originally Posted by HiFiNutNut

Greg,
I am flattered! You have to come and listen to my new system, which shall be ready in the next 4 weeks, it should be much better than the one you listened to before. Bring your amps and stuff too.
Regards,
Bill

Which is your new system?

[HiFiNutNut]

Originally Posted by Telstar

Which is your new system?

This one, posted a few months ago, should be finished in a few weeks for sure. Upgraded all 3 power amps a couple of weeks ago. Everything is ready, just need to put the XO/EQ/preamp together with a few shunt regs each driving the tweeter, midrange, woofer and subwoofer. Still need one additional amp to drive the subwoofers not in site of the photo.

The simplistic Salas low voltage shunt regulator

[ikoflexer]

Nice system!

Bill, what other regulators have you tried so far? How would the sound compare?

[Overm]

Bypass caps only work effectively if they have very low self resonance, otherwise you simply add resonances from both, main and bypass cap, making matters worse. This is the main reason why bypass caps usually aren't very effective.

Thanks to ECDesigns

[Salas]

Originally Posted by ikoflexer

I've had that experience with J201 as well. Usually some mishap with the probes in the running circuit or with the soldering iron. Sensitive little ones.

J201 was the cause of 2 blown Mosfets when I did the 5d beta too. Mine just gave up the ghost when at work under 220uF. With 47uF it lives on.