Simplistic Mosfet HV Shunt Regs - Page 112

pidesd · 28th June 2010, 03:28 AM

hey salas,

when you said (post 1001) that you would mirror the reg s schematic for us but had no HV gear to test it on, what did you mean exactly? did you mean something like an amplifier? because there is a possibility that i could be able to send one your way.

Jean-Charles · 28th June 2010, 06:07 PM

Salas,
As promissed, I report on the performance of the HV shunt reg. As I told you I installed it in my tube preamplifier. For information, this preamp is a Curcio Daniel-II. It is already an excellent machine that I had a chance to compare several times againts the best gears on the market. It always ranked among the top.
I initiated many upgrades since its construction with significant improvements on sound with any of them. I though I had come to the end until I upgraded the regulator section with a Guido Tent fixed 15V shunt regulator and your HV shunt regulator.
Both these upgrades made a huge difference in sound quality. Among my first impressions, I noticed reduce noise, better overall definition, exeptional image with pin point location of musicians and performers. I also found deeper sound stage, and clear reproduction of concert hall or studio reverberation when there is.
The upgrades where made in two steps, the Tent Lab first, so I could apppreciate the improvements gained with it. I did listen to it for several weeks until I could finaly find time and opportunity to install your HV shunt.
The HV shunt makes even more difference than the Tent Lab alone, but their action adds up to give the preamp outstanding performances.

Beside continuing the listening sessions, I will make comparisons with other high end preamplifiers and report on my findings.

This is well done Salas, an excellent design, great boards.
I can only thank both of you for the efforts and recommand to anyone desiring to build a performing HV shunt regulator, to try this one.

Salas · 28th June 2010, 06:10 PM

Thanks for the positive feedback. Board's aren't my work, its a third party initiative, he is in the vendor section now. Happy listening.

P.S. What is the Tent Labs for? What uses 15V in your build?

Salas · 28th June 2010, 06:11 PM

Quote:

Originally Posted by pidesd

hey salas,

when you said (post 1001) that you would mirror the reg s schematic for us but had no HV gear to test it on, what did you mean exactly? did you mean something like an amplifier? because there is a possibility that i could be able to send one your way.

I will try to theoretically mirror one so you can try instead and tell us if it works.

pidesd · 28th June 2010, 06:19 PM

that would be nice. i dont have an oscilloscope though. but i got fluke 187 multimeter and a pair of very well shaped cochleas.

Jean-Charles · 28th June 2010, 10:44 PM

Quote:

Originally Posted by Salas

P.S. What is the Tent Labs for? What uses 15V in your build?

It replaces the 7815 as IC1 in the Master Regulator. It is floating on top of the high voltage supply between VCC and VEE. It is used to power the op amp in the line amplifier.
The included diagrams should explain it all.
Thank you

Salas · 28th June 2010, 10:52 PM

I see, thanks.

Salas · 29th June 2010, 12:45 AM

Quote:

Originally Posted by pidesd

that would be nice. i dont have an oscilloscope though. but i got fluke 187 multimeter and a pair of very well shaped cochleas.

Here you are. Just theoretically OK. Good luck.

pidesd · 01:27 AM

thank you.

and may the force be with me indeed.

one question:

what is the most proven pre reg filter for this reg so far? do you think 220uf+470r+220uf would be a safe choice, as i ve seen a couple time here before?

edit: also, what i want to power with this reg (exstata) requires 300Vout. any change required to the circuit (+ and - reg)?

Salas · 29th June 2010, 01:33 AM

Some builder have shown SSHV DVM photos with the MJE350 holding even at over 300V (which is its spec). So give it +/-320V DC input and go +/-300V with the trimmers. What is the +/-ma that your electrostatic headphones amp will consume? Needed info.

CLC pre filter people say its subjectively better. CRC is nice for sizing the input voltage when trafos and mains aren't exact on the other hand.

29th June 2010, 01:22 AM	#1119
pidesd diyAudio Member Join Date: Apr 2008 Location: montreal (cotes des neiges yo!)	thank you. and may the force be with me indeed. one question: what is the most proven pre reg filter for this reg so far? do you think 220uf+470r+220uf would be a safe choice, as i ve seen a couple time here before? edit: also, what i want to power with this reg (exstata) requires 300Vout. any change required to the circuit (+ and - reg)? Last edited by pidesd; 29th June 2010 at 01:27 AM.

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28th June 2010, 03:28 AM	#1111
pidesd diyAudio Member Join Date: Apr 2008 Location: montreal (cotes des neiges yo!)	hey salas, when you said (post 1001) that you would mirror the reg s schematic for us but had no HV gear to test it on, what did you mean exactly? did you mean something like an amplifier? because there is a possibility that i could be able to send one your way.

28th June 2010, 06:07 PM	#1112
Jean-Charles diyAudio Member Join Date: Oct 2004 Location: Ste-Agathe des Monts	Salas, As promissed, I report on the performance of the HV shunt reg. As I told you I installed it in my tube preamplifier. For information, this preamp is a Curcio Daniel-II. It is already an excellent machine that I had a chance to compare several times againts the best gears on the market. It always ranked among the top. I initiated many upgrades since its construction with significant improvements on sound with any of them. I though I had come to the end until I upgraded the regulator section with a Guido Tent fixed 15V shunt regulator and your HV shunt regulator. Both these upgrades made a huge difference in sound quality. Among my first impressions, I noticed reduce noise, better overall definition, exeptional image with pin point location of musicians and performers. I also found deeper sound stage, and clear reproduction of concert hall or studio reverberation when there is. The upgrades where made in two steps, the Tent Lab first, so I could apppreciate the improvements gained with it. I did listen to it for several weeks until I could finaly find time and opportunity to install your HV shunt. The HV shunt makes even more difference than the Tent Lab alone, but their action adds up to give the preamp outstanding performances. Beside continuing the listening sessions, I will make comparisons with other high end preamplifiers and report on my findings. This is well done Salas, an excellent design, great boards. I can only thank both of you for the efforts and recommand to anyone desiring to build a performing HV shunt regulator, to try this one.

28th June 2010, 06:10 PM	#1113
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Thanks for the positive feedback. Board's aren't my work, its a third party initiative, he is in the vendor section now. Happy listening. P.S. What is the Tent Labs for? What uses 15V in your build?

28th June 2010, 06:19 PM	#1115
pidesd diyAudio Member Join Date: Apr 2008 Location: montreal (cotes des neiges yo!)	that would be nice. i dont have an oscilloscope though. but i got fluke 187 multimeter and a pair of very well shaped cochleas.

28th June 2010, 10:52 PM	#1117
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	I see, thanks.

29th June 2010, 01:33 AM	#1120
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Some builder have shown SSHV DVM photos with the MJE350 holding even at over 300V (which is its spec). So give it +/-320V DC input and go +/-300V with the trimmers. What is the +/-ma that your electrostatic headphones amp will consume? Needed info. CLC pre filter people say its subjectively better. CRC is nice for sizing the input voltage when trafos and mains aren't exact on the other hand.

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