The simplistic Salas low voltage shunt regulator - Page 5

mikelm · 9th May 2009, 06:24 PM

here is one

NATIONAL SEMICONDUCTOR LM329DZ - newark

jwb · 9th May 2009, 06:31 PM

Well sure, the LM329DZ is an excellent part ... but it's not a series of parts, it's only the 6.3V version.

mikelm · 9th May 2009, 06:58 PM

6.9V

homemodder · 10th May 2009, 12:01 PM

Zeners are tricky around those voltages, must use temp compensated ones, I have used 1n3157 and 1n4784 for these voltages. The 1n3157 is excellent part. The 1n4738 is a regular zener.
1n829 performs better than lm329 and cheaper too.

Salas · 10th May 2009, 12:10 PM

Any best recommendations for 20, 24 & 36V?

homemodder · 10th May 2009, 12:40 PM

Lets see, for 20v use 1n4060 or 4061, for 24v 1n4062 and 36v 1n4066.

mikelm · 10th May 2009, 01:07 PM

Quote:

Originally posted by homemodder
1n829 performs better than lm329 and cheaper too.

1 x 1n829 at newark = $9.09 - only source I can find in US

1 x lm329 at newark = $0.76 - cheapest price I could find in US

for now I think lm329 is good enough !

Salas · 10th May 2009, 01:29 PM

Quote:

Originally posted by homemodder
Lets see, for 20v use 1n4060 or 4061, for 24v 1n4062 and 36v 1n4066.

Saw the datasheets, nice Zeners. Thanks.

Here we go then. Not just any Zener, but 1N40XX Microsemi temperature compensated components, are to be preferred by shunt builders if they can get their hands on them. Noise concerns by possible wrong Zener choices addressed.

ikoflexer · 10th May 2009, 03:09 PM

So, good, you got salas' blessing. Just curious, homemodder, how did you come across this info?

homemodder · 10th May 2009, 03:25 PM

I use zeners in amps, in current sources, not ideal but it helps when I dont want turn on thump, also have a friend who works for a company that designs some very sensitive measuring instruments for ESA, European space agency, these guys use top notch components and he gives me hints here and there.

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9th May 2009, 06:24 PM	#41
mikelm diyAudio Member Join Date: May 2003 Location: England	here is one NATIONAL SEMICONDUCTOR LM329DZ - newark

9th May 2009, 06:31 PM	#42
jwb diyAudio Member Join Date: Mar 2002 Location: San Francisco, USA	Well sure, the LM329DZ is an excellent part ... but it's not a series of parts, it's only the 6.3V version.

9th May 2009, 06:58 PM	#43
mikelm diyAudio Member Join Date: May 2003 Location: England	6.9V

10th May 2009, 12:01 PM	#44
homemodder diyAudio Member Join Date: May 2006	Zeners are tricky around those voltages, must use temp compensated ones, I have used 1n3157 and 1n4784 for these voltages. The 1n3157 is excellent part. The 1n4738 is a regular zener. 1n829 performs better than lm329 and cheaper too.

10th May 2009, 12:10 PM	#45
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Any best recommendations for 20, 24 & 36V?

10th May 2009, 12:40 PM	#46
homemodder diyAudio Member Join Date: May 2006	Lets see, for 20v use 1n4060 or 4061, for 24v 1n4062 and 36v 1n4066.

10th May 2009, 03:09 PM	#49
ikoflexer diyAudio Moderator Join Date: May 2008 Location: Toronto	So, good, you got salas' blessing. Just curious, homemodder, how did you come across this info?

10th May 2009, 03:25 PM	#50
homemodder diyAudio Member Join Date: May 2006	I use zeners in amps, in current sources, not ideal but it helps when I dont want turn on thump, also have a friend who works for a company that designs some very sensitive measuring instruments for ESA, European space agency, these guys use top notch components and he gives me hints here and there.

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