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LM325H
LM325H
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Old 3rd September 2019, 11:52 PM   #1
gabbyhayes is offline gabbyhayes  Canada
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Default LM325H

I'm looking for this IC.
Lots on Ebay, but I'm leery ordering one from China.
I only need one.
Thanx
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Old 4th September 2019, 02:35 AM   #2
PRR is offline PRR  United States
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It can probably be replaced with a couple 3-pin regulators.

I have not seen the 14-pin dual-regs inn decades; and I too would be leery of anything online.
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Old 4th September 2019, 02:59 AM   #3
srh is offline srh  New Zealand
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Hi Gabby, I have some NOS in 14 pin DIL or TO99 metal can. PM me if interested.
Steve.
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Old 4th September 2019, 03:41 AM   #4
steveu is offline steveu  United States
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I found this:
http://shrubbery.net/~heas/willem/PDF/NSC/AN/AN-82.pdf
but this is a very old part and you would be better off with a 78xv and a 79xv,
or a lm317 and a lm337.
If you intend on building a variable bench supply then use op-amps to drive lm317 and lm337, etc to save building the current limit circuit etc.

Last edited by steveu; 4th September 2019 at 03:43 AM.
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Old 4th September 2019, 05:47 AM   #5
franzm is offline franzm
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RC4195, a possible replacement?
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Old 4th September 2019, 05:51 AM   #6
steveu is offline steveu  United States
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Default My old bench supply.

I built this about 45 years go. It's a variable bipolar power supply for use with op-amps. It has no protection other than it's own limitations but some how it has never failed me. The parts were junk a kid could afford. Don't ask me for exact numbers. Note I used a NPN EB junction as a cheap ~6V Zener. The transformer is a 300mA 25VCT Hammond. The point was to make a variable and quiet bipolar supply that ranged from actual zero to the unregulated state. This is similar to what you can make with an old LM325.
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Last edited by steveu; 4th September 2019 at 05:57 AM.
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Old 4th September 2019, 05:04 PM   #7
gabbyhayes is offline gabbyhayes  Canada
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Looking for an exact replacement as I'm repairing a HP 339A.
Having said that, a forum member has just what I'm looking for!!
Thanx for all the suggestions.
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Old 4th September 2019, 05:09 PM   #8
gabbyhayes is offline gabbyhayes  Canada
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Quote:
Originally Posted by steveu View Post
I built this about 45 years go. It's a variable bipolar power supply for use with op-amps. It has no protection other than it's own limitations but some how it has never failed me. The parts were junk a kid could afford. Don't ask me for exact numbers. Note I used a NPN EB junction as a cheap ~6V Zener. The transformer is a 300mA 25VCT Hammond. The point was to make a variable and quiet bipolar supply that ranged from actual zero to the unregulated state. This is similar to what you can make with an old LM325.
Looks like you did a great job.
45 years ago.....you've been in the electronics world about the same length of time as me!
We are getting to be dinosaurs. Old electronic techs who can do component level repair will soon also be extinct.
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Old 5th September 2019, 02:45 PM   #9
gabbyhayes is offline gabbyhayes  Canada
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Quote:
Originally Posted by srh View Post
Hi Gabby, I have some NOS in 14 pin DIL or TO99 metal can. PM me if interested.
Steve.
Sent you a PM
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Old 5th September 2019, 09:33 PM   #10
srh is offline srh  New Zealand
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Part posted.
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