[Milsurplus] BB-490 test
Patricia Watkins
[email protected]
Mon, 20 Jan 2003 06:31:24 +0400
Hi Robert and the group,
I think I will bring the leads out a bit and put a fuse holder in the silly
thing, lots of room. The wall wart is made in Taiwan. Interesting that
they went to a non-us contractor for it. Global economy thing I guess.
John WD5ENU/A45XV
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Sunday, January 19, 2003 9:17 PM
Subject: Re: [Milsurplus] BB-490 test
> John & Group,
>
> The wallwart charger for my 12 volt booster battery pack (one of those
sold
> as emergency car starting batteries that I use to run my laptop at events)
> also quit. While recharging the pack from a bench supply, I cut into the
> charger with my bandsaw and found the same thing that you did. Except
that
> the one in mine was white, not black. I am sure it must be a thermal
fuse.
> I jumpered it and closed the unit back up with OD ordnance tape and it
works
> fine. However, if I knew of a source for replacements, I'd open it up
again
> and do the transplant. Mine was electrically at one end of the windings.
>
> In a message dated 1/19/2003 3:05:03 AM Central Standard Time,
> [email protected] writes:
> As a side note, the wallwart power supply that came with the unit went =
> feet up. It looked as if the primary opened. I of course dissected the =
> critter and found an unmarked small black plastic object soldered in =
> series with the primary. It looks as if it is at the midpoint of the =
> windings. Looks just like an unmarked .1 UF 50V PC board capacitor. =
> One of the square little black ones. Anyone else see one of these? I =
> can't believe that they would capacitivly couple at 50 or 60 HZ in a =
> transformer primary.
>
> Robert & Susan Downs
> Houston
> <[email protected]>
>
>
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