Using the HYPNOTIZE as a general shunt reg PCB - Page 4

Salas · 25th December 2009, 11:48 AM

Quote:

Originally Posted by samoloko

Is there a benefit to go with higher than 4700 uF caps when using Salas shunt to power dacs +- 5V -15V or output dac stages like Pass B1, D1

I would concentrate in the quality of the cap more in that case.

pblossom · 30th December 2009, 01:08 AM

I'd like to use regulated power supplies for an F5 project. Would the Hypnotize boards work for +- 24V and 6 amps?
Thanks,
Paul

Salas · 30th December 2009, 02:40 AM

Theoretically yes, but it will be very difficult to match the sides with the LED references and 0.3x resistors. I would use a Vbe controlled source for that. How much more is the 6A than the bias needed per side? You better be economic, so the dissipation is mainly kept at the load.

jleaman · 30th December 2009, 08:59 PM

I think i might try this project for my aleph mini's @ 20V Pos/Neg.

Wonder if it will improve the sound at all.

J'

Tea-Bag · 30th December 2009, 09:46 PM

Quote:

Originally Posted by jleaman

I think i might try this project for my aleph mini's @ 20V Pos/Neg.

Wonder if it will improve the sound at all.

J'

Based on Salas first post, in may be do-able, but one would have to be creative and get the diodes powerful enough, and off board and PCB, since the holes dont except MUR860's, etc. By default the limit is 1A, and this is based on the MUR120 diodes which are a perfect fitr. I've seen at least one proto builder find a way to put MUR860s in anyways.

If you do it, I'll do it...At some point.

jleaman · 30th December 2009, 10:01 PM

Quote:

Originally Posted by Tea-Bag

Based on Salas first post, in may be do-able, but one would have to be creative and get the diodes powerful enough, and off board and PCB, since the holes dont except MUR860's, etc. By default the limit is 1A, and this is based on the MUR120 diodes which are a perfect fitr. I've seen at least one proto builder find a way to put MUR860s in anyways.

If you do it, I'll do it...At some point.

If i do it, ill wire diodes off board and beside the fet's.

J'

samoloko · 21st January 2010, 06:51 PM

Hi Salas

would you please explain Setting the current formula

ICCS=2.2V/Rset

Salas · 21st January 2010, 07:43 PM

It comes from 3LedsVf minus Vgs divided by R1. That 2.2V is a measured ballpark from various builds, so to project some R value, since there is tolerance both in Leds, their local NJFET CCS, IRFP Vgs. You always should measure the drop on the set resistor(s) R1 in the end and divide by Ohmic value so to really know the running current in each build, and adjust if necessary.

samoloko · 22nd January 2010, 06:09 AM

thank you

merlin el mago · 22nd January 2010, 11:47 AM

Quote:

Originally Posted by Salas

It comes from 3LedsVf minus Vgs divided by R1. That 2.2V is a measured ballpark from various builds, so to project some R value, since there is tolerance both in Leds, their local NJFET CCS, IRFP Vgs. You always should measure the drop on the set resistor(s) R1 in the end and divide by Ohmic value so to really know the running current in each build, and adjust if necessary.

Everyday I learn something you tech

30th December 2009, 01:08 AM	#32
pblossom diyAudio Member Join Date: Jan 2004 Location: Michigan	Would this work for the F5? I'd like to use regulated power supplies for an F5 project. Would the Hypnotize boards work for +- 24V and 6 amps? Thanks, Paul __________________ The human capacity for self delusion is nearly infinite.

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30th December 2009, 02:40 AM	#33
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Theoretically yes, but it will be very difficult to match the sides with the LED references and 0.3x resistors. I would use a Vbe controlled source for that. How much more is the 6A than the bias needed per side? You better be economic, so the dissipation is mainly kept at the load.

30th December 2009, 08:59 PM	#34
jleaman Banned Join Date: Apr 2002	I think i might try this project for my aleph mini's @ 20V Pos/Neg. Wonder if it will improve the sound at all. J'

21st January 2010, 06:51 PM	#37
samoloko diyAudio Member Join Date: Jun 2006	Hi Salas would you please explain Setting the current formula ICCS=2.2V/Rset

21st January 2010, 07:43 PM	#38
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	It comes from 3LedsVf minus Vgs divided by R1. That 2.2V is a measured ballpark from various builds, so to project some R value, since there is tolerance both in Leds, their local NJFET CCS, IRFP Vgs. You always should measure the drop on the set resistor(s) R1 in the end and divide by Ohmic value so to really know the running current in each build, and adjust if necessary.

22nd January 2010, 06:09 AM	#39
samoloko diyAudio Member Join Date: Jun 2006	thank you

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