Simplistic Mosfet HV Shunt Regs - Page 355 - diyAudio
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Old 30th November 2012, 05:55 PM   #3541
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Could you post schematic? pics?
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Old 30th November 2012, 09:52 PM   #3542
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Default Merlin, are you speaking to me?

There is not useful schematic for the PCB. Plenty of schematics for the circuit, itself.

Here is a link to the manual at Broskie's site. http://tubecad.com/2008/07/13/PH-1%20Phono%20preamp.pdf

Look on page 11.

One can easily use the resistor positions on the B+ rail for the regulators but the grounds ....

Thanks for your interest.
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Old 1st December 2012, 07:30 AM   #3543
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Quote:
Originally Posted by Salas View Post
OK, we cross posted. Those numbers SSLV1.1 can do with IRF9530 at CCS position also as it has on output already. And its better spec than the the BJT special one for 1.5V-2.5V I designed for disco once. You set it at 1.5A and Bob's your uncle.
Salas.......For Q101, have you changed to use IRF9530 as well?? better??

What is CCS current setting and CCS-LoadCurrent?? The filament is burning at 1.25-1.50A....will there be lots of heat at Q106??

Could I use 9V-0V-9V 3.3A transformer per channel??

Cheers,

King
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Old 1st December 2012, 09:36 AM   #3544
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Quote:
Originally Posted by rickmcinnis View Post
There is not useful schematic for the PCB. Plenty of schematics for the circuit, itself.

Here is a link to the manual at Broskie's site. http://tubecad.com/2008/07/13/PH-1%20Phono%20preamp.pdf

Look on page 11.

One can easily use the resistor positions on the B+ rail for the regulators but the grounds ....

Thanks for your interest.
What's the problem with the grounds? Or do you use two regulators with different B+ for each channel?
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Old 1st December 2012, 04:01 PM   #3545
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Default Reply to merlin

That all of the regs will be the same is my intention.

I know this would not be a concern with four passive supplies but the sensing connection of the SALAS regulator had me concerned that there could be some kind of unwanted interaction.
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Old 1st December 2012, 04:37 PM   #3546
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I never tried, but why do you want to do four regs? what's the total consumption of your Aikido?
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Old 1st December 2012, 06:12 PM   #3547
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Quote:
Originally Posted by rickmcinnis View Post
I am building four of the regulators to power a Broskie Aikido phono board using TEA BAGS pcbs (thanks again, TB)

It is basically four of the AIKIDO circuits on one board.

I am using four since I have ECC99's in the cathode follower position and these seem to require more than average current so I figured why not use four?

It is simple to connect the positives to the individual "modules" and they are isolated but PCB surgery (not that I am afraid of this) is required to isolate the individual grounds. The question is: is it necessary?

My instinct is that it is but I thought I would ask before starting the procedure.

Help is appreciated and my apologies for not knowing the answer to this myself.

THANKS!
Yes, it is necessary if you want the Kelvin sense system to work best, and its audible when it does so.
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Old 1st December 2012, 06:13 PM   #3548
Salas is offline Salas  Greece
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Quote:
Originally Posted by king4joy View Post
Salas.......For Q101, have you changed to use IRF9530 as well?? better??

What is CCS current setting and CCS-LoadCurrent?? The filament is burning at 1.25-1.50A....will there be lots of heat at Q106??

Could I use 9V-0V-9V 3.3A transformer per channel??

Cheers,

King
In SSLV1.1 builds thread for the LV questions. Thanks.
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Old 1st December 2012, 06:15 PM   #3549
Salas is offline Salas  Greece
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Originally Posted by Milos P. View Post
hmm... 2N5457?
No, dangerous for coming up with a high Vgs(off) sample relative to the purpose here even at low IDSS.
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Old 1st December 2012, 07:18 PM   #3550
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OK, thank you.
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