HP-1144A/PS-1144 WANTED

[Mike Morris]

First  pop the transformers secondary wires loose and check the
voltage, then if it's zero, verify voltage is reaching the
xformer primary - you could have an open fuse holder (yes, it
happened to me...)

If you have voltage on the primary, and zero on the secondary,
peel the fish paper off the secondary and find where the
insulated wires are soldered to the actual enameled winding. You
might find one is loose due to overheating and melted solder
(hey, you've got nothing to loose, the xformer is zero volts
anyway...)

Some transformers had a short piece of thin wire inside the
xformer as a secondary fuse.  I generally jumper that and add
an external secondary fuse.

By the way, 99% of the dead wall-wart power packs include a
blown secondary fuse.  They run the diodes and filter caps too
close to their ratings, and something shorts and blows the fuse.
I've recovered a few of them ....

Mike WA6ILQ

At 08:45 AM 08/21/99 +0000, you wrote:
>Be sure to lift the wires from the bridge. check for input voltage to the
>primary (blown fuse? broken wire? bad connection?)
>Ed.
>
>On Sat, 21 Aug 1999 09:37:48 -0400 Sandy Gerli <angerli at ESSLINK.COM>
>writes:
> >Hi, everyone...
> >
> >Major meltdown time. My HP-1144A has probably lost its transformer.
> >No
> >voltage appearing at the input to the rectifier bridge. Not a good
> >prognosis.
> >
> >So....I'd like to buy a spare, working supply if anyone has one to
> >offer
> >up. Doesn't have to be in the SB-104-style speaker case; I've got
> >that.
> >
> >Please e-mail me and let me know what you have.
> >
> >73,
> >
> >--
> >Sandy Gerli, AC1Y
> >500 Country Club Road
> >Avon, CT  06001-2406
> >(860) 675-5566
> >E-Mail: angerli at esslink.com
> >
> >Life Member: ARRL, QCWA
> >Collins Collectors Association
> >Hallicrafters Collectors Association
> >
> >Boatanchors are Ham Radio's living heritage!
> >Restore something! Smell that hot solder!
> >Sure beats booze. And, you can get up afterwards!!
> >Keep your finals dipped...
> >
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