gb wrote:

"Kerry Miller" wrote in message
news:84YDf.148864$WH.136453@dukeread01...

Since I'm going to have to order a chip for that Astron PS I was working
on, I dug out another old PS that died a few years back. If I have to pay
shipping, I might as well order enough parts to at least make up for the
shipping costs...

Does any of you guys know where to find a schematic for a Yaesu FP-757HD
power supply? It has a 3-terminal regulator in it, it looks like a 317,
but it has funky markings on it which say B824, then down and to the right
it says Q5D. It might be an O or 0 (zero) 5D. Do you guys know if you
can replace this B824 thing with an LM317? The transistors are oddballs
too but I haven't gotten the number for them. If I have to, I can just
start from scratch on it, there's not much to it and there were a couple
of caps with the legs corroded off. I can probably just come up with my
own regulator as easy as I can fix this one unless I can find a schematic.

Do you guys know where to find a schematic for this thing?

Tnx,
Kerry, WD5ABC


Manual is on the MODS.DK web site.
http://www.mods.dk/downloadmanual.ph...7HD_Manual.pdf

TO-3 or TO-220 case for regulator?




The one I'm looking at with that strange part number is a TO-220. I'll
have to take the schematic and see which one it is, that number doesn't
match any of the part numbers on the schematic. I picked up a few spare
723s and 317s today, maybe I'll just make my own if I have to.

73,
Kerry
PS That's a great web site, I just bookmarked it.