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The simplistic Salas low voltage shunt regulator
The simplistic Salas low voltage shunt regulator
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Old 19th September 2009, 11:53 PM   #1081
iko is offline iko  Canada
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The simplistic Salas low voltage shunt regulator
Quote:
Originally Posted by RCruz View Post
Maybe I should also try MPSA18 .... I have some...

Ricardo
Ricardo, you should definitely give it a try. But with those miles of shunt output cables you got there... I'm not sure it can make a difference (just kidding)
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Old 19th September 2009, 11:55 PM   #1082
Melon Head is offline Melon Head  Australia
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Are there pcbs available for these yet?
If so I will try all of these with the equipment I have access to.
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Old 20th September 2009, 12:05 AM   #1083
iko is offline iko  Canada
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The simplistic Salas low voltage shunt regulator
There's the pcb part of the buffer GB, which includes some variation of v1, but I haven't checked the schematic out, salas, maybe you can say something about it.

I'm working on a pcb for v1.5 and v2, have been prototyping heavily for the last two weeks. It's still under construction though. Got some nice results so far. However, these circuits are not very difficult to build, even point to point.
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Old 20th September 2009, 12:21 AM   #1084
Salas is offline Salas  Greece
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The simplistic Salas low voltage shunt regulator
James did pcb work page 23 post 226

Also Disco did pcb work on 10X16cm Eurocard.
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File Type: gif lvshunt.gif (187.9 KB, 822 views)
File Type: gif shuntreg-lv-bouwplan.gif (45.7 KB, 1235 views)
File Type: jpg simplereg-2.jpg (59.6 KB, 794 views)
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Old 20th September 2009, 12:33 AM   #1085
Salas is offline Salas  Greece
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The simplistic Salas low voltage shunt regulator
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Originally Posted by ikoflexer View Post
There's the pcb part of the buffer GB, which includes some variation of v1, but I haven't checked the schematic out, salas, maybe you can say something about it.
Its led referenced 10V symmetrics with 100uF output caps set at 70mA CCS for the DC B1. at such voltages leds are lending themselves bcs you can reach with just 5. Guys who have AC coupled original B1, made DC with 317 & 337 and then that. They had a large benefit as they said. Still B1 is a CCSed line level follower and is supposed to be more immune than an SE resistor loaded phono for instance. The output caps I chose are for good termination given the vrefs, CCS settings, etc. Taking into account typical layout ''sins''. So to get good step response as JWB once measured an excellent result. Kinda optimized you could say.

Someone can take part in the GB, get one, cut along the red line. Can mount the IRFPs under PCB to a thick enough metal floor. No sinks for 200-300mA per side. Just a silicone insulation pad.

If for higher Vout, can get creative with all those led pads for Vref. Good zeners, resistors, since there is already an inline ccs, whatever.
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File Type: jpg HypnRegs.jpg (146.3 KB, 741 views)
File Type: jpg dcb091809 001.jpg (138.4 KB, 393 views)
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Old 20th September 2009, 12:40 AM   #1086
Melon Head is offline Melon Head  Australia
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I was meant to meet up with James but we live at opposite ends of the city, so it never eventuated.
Maybe I will pay him to make me some. My time is very limited at the moment.

Stuff it. I will do it point to point using James layout.

Last edited by Melon Head; 20th September 2009 at 12:43 AM.
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Old 20th September 2009, 12:59 AM   #1087
Melon Head is offline Melon Head  Australia
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could you send me the schematic for that version (I assume it is version 1, but not sure)
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Old 20th September 2009, 01:02 AM   #1088
Salas is offline Salas  Greece
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The simplistic Salas low voltage shunt regulator
http://www.diyaudio.com/forums/showp...9&postcount=11

http://www.diyaudio.com/forums/showp...1&postcount=12
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File Type: gif regs.gif (128.3 KB, 466 views)
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Old 20th September 2009, 03:38 PM   #1089
maxpou is offline maxpou  Canada
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Hi Guys,
this is my negative and positive Salas shunt regulator but the only difference i use irfp150 and irfp9140 for mosfets. i will test as soon as possible in preamp line stage. Some picture. Thanks Maxpou
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File Type: png pcb shunt reg..png (25.2 KB, 440 views)
File Type: jpg P1030649.JPG (163.4 KB, 421 views)
File Type: jpg P1030651.JPG (154.2 KB, 373 views)
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Old 20th September 2009, 05:33 PM   #1090
Salas is offline Salas  Greece
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The simplistic Salas low voltage shunt regulator
Very decent work. Bravo. Waiting for your subjective comments. You may up the zener shunting capacitor to 1000uF although your zeners look as good types.

What about contributing the pcb? Looks practical.
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