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Old December 22nd 05, 04:40 AM posted to alt.binaries.schematics.electronic,rec.antiques.radio+phono,rec.radio.amateur.antenna,rec.radio.amateur.homebrew
ehsjr
 
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Default Still looking for a Tripp Lite PR-25 (or similar) DC power supplyschematic

Paul P wrote:
There are a couple of smoked resistors on the regulator board. I can not
trust the ohm meter reading so I wanted to verify its value. I am trying to
avoid De-engineering the board. Now once the resistors are replace there
may be something else that smoked the resistors too.

Paul.


Here's a link to an Astron supply:
http://www.seits.org/features/pwrsup.htm

Assuming a typical 723 == pass transistors linear supply,
it shouldn't be hard to figure out the values of the cooked
resistors. The schematic at the link above serves well as a
model for many (most?) of that type of supply. Combined
with the LM723 datasheet, you can fix it.

Ed




"PS_DUDE" wrote in message
...

hi paul,

Tripp lite makes good supplies but lacks in the
support side !

Good thing is the supplies use off the shelf parts
or easy substituted parts from anywhre,
http://www.mouser.com etc.

What problem(s) are you having ?

73 ps dude