It took me probably half an hour to build this brilliant shunt regulator. I waited for a long time until picked up this board and stuffed all components. I will use it in my next generation of DHT preamps.
Output ripple is below 5mV, can’t even measure it given the noise in my workbench. The test gig included my variable power supply (600V) feeding the shunt regulator which was set for 40mA. output load is three 3K3 power resistor clads (50W each).
I adjusted the regulator to provide about 160V, so current is about 16mA. Interesting to seer the harmonic profile to have a higher peak at 200Hz compared to the 100Hz harmonic….
Hi Ale
Can I ask where you found the PCB for this project? I am looking for one of these for a phono stage I am working on.
Thanks
Martin
Hi Martin,
Of course, there was a group buy lead by Teabag in DYIAudio. They have run a couple of them, so you may want to ask if there is still any planned group buy in the near future…
All the best,
Ale
Hello Ale,
I am in the process of building your 26 V3 preamp. I am gathering supplies and having trouble with the Salas Reg. I found this one on the K&K supplier here in the US. Is the regulator they are selling the same one you use? They say it is based on it. Here is the link to the HV Regulator: http://www.kandkaudio.com/other-kits/
Hello,
Unfortunately can’t comment as haven’t tested it. You may want to ask in the DIYAudio thread as there must be people who have tried it. Alternatively ask Kevin from K&K for a reference of someone who has used it in a DHT stage
Good luck
Ale
Hi Ale, I have just finished a very simple 26 preamp as a prototype on a bread board but are yet not too happy with it…
After reading your suggestions how to build a proper 26 amp I will now start to improve my amp step by step.
One of the improvments will be the adition of the SSHV2.
May I ask you if you know a source where the Salas V2 reg can be bought ready made?
Thanks
Lorenz
Hi Lorenz
I moved away from the shunt regulator as had several issues with it and is complex to implement
Pressed enter too soon.
Now I’m using cap multipliers instead. Search around the blog and you will find more info about them