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Old June 8th 09, 05:18 PM posted to rec.radio.amateur.homebrew
JB[_3_] JB[_3_] is offline
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First recorded activity by RadioBanter: Apr 2008
Posts: 543
Default Astron Power supply mod

"raypsi" wrote in message
...


oops, now I see why that wont work. I guess I am going to have to do
this from scratch

Jimmie


Well OM:

Maybe and maybe not.

A battery charger IC would be a lot better than a regulator, like a
MAX713, which is for NiMh batteries, or the UC3906.
So if that's from scratch I guess you are right.

73 OM
de n8zu


You can likely bypass the entire regulator and pick off 25 v raw from the
filter bank. First thing to do would be to get the schematic. You would
start by removing the regulator/crowbar anyway and swap in a perf board. I
don't know what the voltage rating is on the filter bank though. Schematics
are one page simple and out there on the Net. There are some other mods
out there with descriptions. It is just a 723 comparator.