Ian,
If the PR-25 is anything like the PR-40 then it uses the ubiquitous 723
regulator circuit that has been around for 30 years. Most of the highly
touted Astrons use the 723 circuit so an Astron circuit might be a good
place to start. Data sheets for the 723 are available on the web. (Hint. Put
a socket in for the 723.) The ARRL Handbook usually has 723 circuits in it.
I was given a PR-40a that took a lightning hit and was being thrown
away. Replacing the shorted rectifiers, pass transistors, and exploded 723
brought it back to life. The power transformer runs a bit warmer than I
would have expected. I believe that to be because Tripp Lite uses cheap
transformers without enough iron in them. Anyhow, it has run 24/7 for a
couple of years now since the repairs so assume it's fixed. YMMV.
Al, K9SI
> tripp lite pr-25
> Posted by: "Ian Miller" [EMAIL PROTECTED] va2ir
> Date: Thu Dec 14, 2006 4:55 pm ((PST))
>
> Hi all
>
> Looking for a schematic for a PR-25 tripp lite power supply.
>
> Can anyone help?
>
> Contact me off list at
>
> va2ir at securenet dot net
>
> Thanks
>
> 73
> Ian
