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Old 9th May 2009, 07:24 PM   #41
mikelm is offline mikelm  England
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here is one

NATIONAL SEMICONDUCTOR LM329DZ - newark
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Old 9th May 2009, 07:31 PM   #42
jwb is offline jwb  United States
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Well sure, the LM329DZ is an excellent part ... but it's not a series of parts, it's only the 6.3V version.
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Old 9th May 2009, 07:58 PM   #43
mikelm is offline mikelm  England
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6.9V
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Old 10th May 2009, 01:01 PM   #44
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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.
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Old 10th May 2009, 01:10 PM   #45
Salas is offline Salas  Greece
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Any best recommendations for 20, 24 & 36V?
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Old 10th May 2009, 01:40 PM   #46
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Lets see, for 20v use 1n4060 or 4061, for 24v 1n4062 and 36v 1n4066.
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Old 10th May 2009, 02:07 PM   #47
mikelm is offline mikelm  England
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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 !
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Old 10th May 2009, 02:29 PM   #48
Salas is offline Salas  Greece
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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.
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Old 10th May 2009, 04:09 PM   #49
iko is offline iko  Canada
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So, good, you got salas' blessing. Just curious, homemodder, how did you come across this info?
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Old 10th May 2009, 04:25 PM   #50
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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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