IP-27 Parts, Binding Posts & Cal Procedure

[G. Beat]

Alex -

So how is the restoration project going on the IP-27 ??

g. beat
w9gb

----- Original Message -----
From: "Alex" <temple-heath at LAVO.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Wednesday, August 18, 2004 11:52 PM
Subject: IP-27 Parts, Binding Posts & Cal Procedure


> Hello,
>
> I'm restoring a IP-27 LV Power supply that I got back from a friend who
> had
> purchased it from me (used/non-functional) about 25 years ago. Got the
> Heathkit bug and decided to trade it back for some work I recently did for
> him. He never fixed it so it was pretty much in the same condition as when
> I first got it at a flea market.
>
> Already got the power supply operational, thanks to a partial manual &
> schematic from BAMA, and after replacing some parts: changed all 3 power
> transistors (someone had put in Silicon ones) back to Germanium units (had
> to use substitutes), replaced 4 electrolytic caps, and added a missing
> zener. Still need the 500-ohm thermistor (it's missing), and the output
> binding posts (two of them are just missing their respective red and black
> plastic buttons, and the third one (green) is completely broken off, so
> the
> whole part will be needed.
>
> If anyone has a spare unit for parts, and is willing to part with the
> binding posts (preferably in good condition) and/or the thermistor (Heath
> p/n is "9-9"), I'll be more than willing to pay a fair price plus
> shipping.
> BTW, these same binding posts are also used on many other Heathkits. If
> you
> happen to have something that might fit my needs, please let me know the
> model of the unit so I can make sure the parts are compatible. I know I
> could just drop in any other generic binding post, but I'm kind of aiming
> to get the unit back to it's original Heath look. Would also be interested
> in buying the original power transistors, and maybe some other parts as
> spares. If you can help, please just let me know what you have.
>
> Finally, if someone happens to know the correct calibration procedure for
> this power supply (3 trimmers on the back of the unit), I'll be most
> grateful to receive a detailed description. The manual I downloaded is
> missing the calibration section. So far I only managed to "ballpark" the
> unit's calibration, but would very much like to make sure I have it
> "right-on".
>
> Thanks in advance.
>
> Regards / 73
> Alex
>
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Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

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This list is a public service of the City of Tempe, Arizona
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To post - HEATH at LISTSERV.TEMPE.GOV
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