Simplistic Mosfet HV Shunt Regs - Page 169

dvb-projekt · 12th March 2011, 12:08 PM

Hi Salas,

for my Tube-I-zator i have two possibilities to config my psu:

Witch of the two would you prefer?

piero7 · 12th March 2011, 12:37 PM

I'm not salas, but the N.1 for sure!

Salas · 12th March 2011, 12:47 PM

I would agree.

dvb-projekt · 12th March 2011, 01:32 PM

Thanks, that´s the way i had in my mind

gmant123 · 28th March 2011, 10:05 AM

Hello all.
I wish try the SSHV in a SE power amp.
The +B is 330V at 86ma
You could suggest me the inicial value for R1 for (86mA+25mA) 111mA? Some other advice?
Thank you in advance,

Salas · 28th March 2011, 10:44 AM

SE power amp may upset this regulator because of the output transformer's strong inductive load. It has been tried on smaller headphones amplifiers, can't say for this, its your test. 3 Leds of 1.9V drop each, R1=18R 2W, R3=67K 5W. 350VDC input. R4 120K make from 240K//240K 2W each. MJE350 may hold at 330V out, test stronger Vmax PNP if not.

gmant123 · 28th March 2011, 11:23 AM

Thank you for reply Salas.
I will try...
Is better if use one reg for de output stage? is a 65mA load...

Alberto.

Salas · 28th March 2011, 12:54 PM

The input stage will benefit the most from a regulator. If it can not cooperate for the amp as a whole, run it lower current and use it for the input stage only. So it will not be left without a task if it can't serve for the power stage stably.

albertli · 29th March 2011, 06:13 AM

Hi Salas,

I'm planing a new 26 pre amp and would love to add 2 shunt regs for separated channels before the OPT. Please take a look at the attached and do advise if there is anything I have to pay more attention on.
Thanks

Albert

albertli · 29th March 2011, 06:22 AM

Sorry, the attachment didn't go with it.
Basically I follow the new version with some changes. R1-56R, R3/56K and R5-100k. I go with CLC and split into 2 RC 180v to the regs. I'm aiming at 150v 9 mA.

Albert

12th March 2011, 12:08 PM	#1681
dvb-projekt diyAudio Member Join Date: Feb 2009 Location: Willich, Germany Blog Entries: 31	Hi Salas, for my Tube-I-zator i have two possibilities to config my psu: Witch of the two would you prefer? __________________ Reference TDA1541A DAC project PCB´s / Tube-I-zator PCB / SSHV-Shunt PCB Stock status in my Blog

12th March 2011, 01:32 PM	#1684
dvb-projekt diyAudio Member Join Date: Feb 2009 Location: Willich, Germany Blog Entries: 31	Thanks, that´s the way i had in my mind __________________ Reference TDA1541A DAC project PCB´s / Tube-I-zator PCB / SSHV-Shunt PCB Stock status in my Blog

28th March 2011, 11:23 AM	#1687
gmant123 diyAudio Member Join Date: Dec 2009	I will try Thank you for reply Salas. I will try... Is better if use one reg for de output stage? is a 65mA load... Alberto.

29th March 2011, 06:13 AM	#1689
albertli diyAudio Member Join Date: Nov 2004 Location: Vancouver	150v for 26 Hi Salas, I'm planing a new 26 pre amp and would love to add 2 shunt regs for separated channels before the OPT. Please take a look at the attached and do advise if there is anything I have to pay more attention on. Thanks Albert

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12th March 2011, 12:37 PM	#1682
piero7 diyAudio Member Join Date: Apr 2009 Location: Matera	I'm not salas, but the N.1 for sure!

12th March 2011, 12:47 PM	#1683
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	I would agree.

28th March 2011, 10:05 AM	#1685
gmant123 diyAudio Member Join Date: Dec 2009	Hello all. I wish try the SSHV in a SE power amp. The +B is 330V at 86ma You could suggest me the inicial value for R1 for (86mA+25mA) 111mA? Some other advice? Thank you in advance,

28th March 2011, 10:44 AM	#1686
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	SE power amp may upset this regulator because of the output transformer's strong inductive load. It has been tried on smaller headphones amplifiers, can't say for this, its your test. 3 Leds of 1.9V drop each, R1=18R 2W, R3=67K 5W. 350VDC input. R4 120K make from 240K//240K 2W each. MJE350 may hold at 330V out, test stronger Vmax PNP if not.

28th March 2011, 12:54 PM	#1688
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	The input stage will benefit the most from a regulator. If it can not cooperate for the amp as a whole, run it lower current and use it for the input stage only. So it will not be left without a task if it can't serve for the power stage stably.

29th March 2011, 06:22 AM	#1690
albertli diyAudio Member Join Date: Nov 2004 Location: Vancouver	Sorry, the attachment didn't go with it. Basically I follow the new version with some changes. R1-56R, R3/56K and R5-100k. I go with CLC and split into 2 RC 180v to the regs. I'm aiming at 150v 9 mA. Albert

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