At 04:01 AM 1/14/05 -0500, [EMAIL PROTECTED] juggled the
keys to produce...
> Since this list is a font of everything electronic, can y'all help me with
> this?
>
> I've got a HP DC power supply (6443B) that's worked great for a long time.
> I DON'T have a service manual for it (of course). Recently, when I turn
> this thing on, the voltage comes up, then drops off slowly (this is under
> no load conditions) over 20-30 seconds, then blows the C/B.
>
> I think I've troubleshot the problem down to the supply side capacitors.
> They're massive can-types. About 3" in diameter by 6" tall. On the side is
> the following information:
>
> Sprague
> Compulytic
> 32D
> 4500-150 DC
> 7230 L
> 0180-1839
>
> I know Sprague has merged several times, but I've been trying to get some
> information about this part from my normal suppliers (Mouser, Digikey)
> with no luck...
>
> Rather than buying the manual for $35, can someone out there help me
> "decode" this part number? I figure if I can find the original capacitance
> and voltage/load ratings, I can just find a more modern replacement.
>
> Thanks in advance for the help, guys.
>
> Richard Perry
====================
There's also an operating/service manual available on ebaY for $14.95
"Buy-it-Now", if you care to have things like detailed calibration
procedure, etc. You may also wish to join/post to a couple YahooGroups,
"nomanual" and "Manual Exchange"
I'm always a bit nervous about a piece of gear that comes without the
manual - especially, say, a built Heathkit. I'm at the mercy of someone
else's building skills then.
But for a capacitor substitution like this, you can probably find what you
need at a distributor, Digi-Key, Mouser, Newark, Allied, etc. Some of them
may be able to let you search for a sub, within the physical envelope of
the original. Before you mount the thing permanently, try just
disconnecting and bridging in the sub. There could be other things
failed. Be careful; you are in lethal country there!
73, Phil Barnes-Roberts WA6DZS DM04we | Mailto:wa6dzs at arrl dot net
The only Dumb Question is the one you Didn't Ask because you thought
it would Sound Dumb. --AQF1 Jones
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