Need Help with + _ 90-100 volt regulated power supplies

wrich22 · 15th March 2008, 02:22 AM

I am currently rebuilding two Hafler DH-500 amps, using toroidal transformers, Fred rectifiers and Musical Concepts PA-3E boards
with black gate caps, and 4 - 39,000 uf main caps per amp. To be used to bi-amp my SDA-SRS speakers which I just purchased on e-bay and have since reworked with new mils resistors and Polyproplyene caps

I am looking for a state of the art power supply -+ 95 volt for the
front end, low level and drivers. I plan to leave the Mosfets unregulated.

I have built several power supplies, based on Boak, Sultzer and Jung designs . Using NE-5534 and LM317-LM337's and floating zener designs, for other Hafler, Dynaco 416, Leach Super Amps, and the Marsh pre-amp about 20-25 years ago. But haven't done much since then

What is the power supply design that will give me the best
results, for my new system. Also I need advice regarding removing
the resistor that separates the Mosfet drivers from the front end

My Initial aproach is use the LM317 and LM337 and float them
using a Zener String using seperate 5-10 volt transformers coupled to the main transformer to give a voltage boost ,rectify and regulate all with a common ground

I would appreciate any advice that anyone has.

Thanks,

Bill (wrich22)

Louisville, Ky

Gordy · 20th March 2008, 08:53 PM

For a high voltage regulator have a look at

Fig. 11 in Linear Technologies Application Note 2, August 1984, Performance Enhancement Techniques for Three Terminal Regulators.

Also

National Semiconductor Linear Brief LB-47, March 1980, High Voltage Adjustable Power Supplies.

For more advice on the amp consider a posting in the Solid State section of the forum.

Good luck,
G.

KSTR · 20th March 2008, 09:22 PM

This one might be helpful:
http://www.glass-ware.com/tubecircui...Regulator.html

Basically identical to what a LM317 does... and with a little redesign one could get away with no extra supply for the regulator.

- Klaus

wrich22 · 21st March 2008, 09:37 PM

Thanks

Bill

Cobra2 · 21st March 2008, 10:46 PM

How about the psu-part for Balanced Line Stage / BoSoZ? (with a couple zeners extra)
http://www.passdiy.com/legacy.htm

Arne K

15th March 2008, 02:22 AM	#1
wrich22 diyAudio Member Join Date: Feb 2007 Location: Louisville, Ky	Need Help with + _ 90-100 volt regulated power supplies I am currently rebuilding two Hafler DH-500 amps, using toroidal transformers, Fred rectifiers and Musical Concepts PA-3E boards with black gate caps, and 4 - 39,000 uf main caps per amp. To be used to bi-amp my SDA-SRS speakers which I just purchased on e-bay and have since reworked with new mils resistors and Polyproplyene caps I am looking for a state of the art power supply -+ 95 volt for the front end, low level and drivers. I plan to leave the Mosfets unregulated. I have built several power supplies, based on Boak, Sultzer and Jung designs . Using NE-5534 and LM317-LM337's and floating zener designs, for other Hafler, Dynaco 416, Leach Super Amps, and the Marsh pre-amp about 20-25 years ago. But haven't done much since then What is the power supply design that will give me the best results, for my new system. Also I need advice regarding removing the resistor that separates the Mosfet drivers from the front end My Initial aproach is use the LM317 and LM337 and float them using a Zener String using seperate 5-10 volt transformers coupled to the main transformer to give a voltage boost ,rectify and regulate all with a common ground I would appreciate any advice that anyone has. Thanks, Bill (wrich22) Louisville, Ky

21st March 2008, 10:46 PM	#5
Cobra2 DIY ! diyAudio Member Join Date: Apr 2002 Location: Stavanger, Norway	How about the psu-part for Balanced Line Stage / BoSoZ? (with a couple zeners extra) http://www.passdiy.com/legacy.htm Arne K __________________ Ars longa, vita brevis

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DH-500 +- 90- 100 volt Regualted power supplies	wrich22	Solid State	0	21st March 2008 10:13 PM
Power Supplies 12 Volt?????	Co_Driver	Solid State	3	6th May 2004 04:59 AM
Regulated Power supplies	Ryder	Solid State	44	21st April 2004 05:15 PM
FS: (2) 28 VDC 11 AMP regulated power supplies.	FEThead	Swap Meet	1	2nd May 2002 04:18 PM
Regulated power supplies	Jason Hubbard	Solid State	20	10th September 2001 08:33 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

20th March 2008, 08:53 PM	#2
Gordy diyAudio Member Join Date: Nov 2006	For a high voltage regulator have a look at Fig. 11 in Linear Technologies Application Note 2, August 1984, Performance Enhancement Techniques for Three Terminal Regulators. Also National Semiconductor Linear Brief LB-47, March 1980, High Voltage Adjustable Power Supplies. For more advice on the amp consider a posting in the Solid State section of the forum. Good luck, G.

20th March 2008, 09:22 PM	#3
KSTR diyAudio Member Join Date: Jul 2007 Location: Central Berlin, Germany	This one might be helpful: http://www.glass-ware.com/tubecircui...Regulator.html Basically identical to what a LM317 does... and with a little redesign one could get away with no extra supply for the regulator. - Klaus

21st March 2008, 09:37 PM	#4
wrich22 diyAudio Member Join Date: Feb 2007 Location: Louisville, Ky	Thanks Bill