[Milsurplus] [Test-Equipment] Wanted: Parts Ecco ZM-3A/U

[D C (Mac) Macdonald]

My ZM-3A/U did not have a cover.  I sold it about
two weeks ago to W5JDY.  It was in great shape but
I hadn't used it in many years.

Mac - K2GKK/5
Oklahoma City



-- WA5CAB at cs.com wrote:

From: WA5CAB at cs.com
Date: Wed, 8 Mar 2006 11:57:45 EST
To: milsurplus at mailman.qth.net, test-equipment at mailman.qth.net
Subject: [Milsurplus] [Test-Equipment] Wanted: Parts Ecco ZM-3A/U 

Groups,

I replaced my Sprague TO-6A with a ZM-3A/U Capacitor Analyzer.
The unit works fine (after a minor mod so that I don't have to
hold the meter switch in the mA position for capacitor reforming).  Looks great, too.  The only problem is that when I put it in its
operating position on the shelf over the work bench, I discovered
that in several places on the dial drum, the shellac coating
over the scales has bubbled and due to relative position of
lighting and drum makes reading the scale difficult.  Hardly
noticable unless you look for it with the unit sitting on the bench.  

I twice tried to buy another complete unit in similar or better
cosmetic condition but lost out both times.  So I'm looking for a
replacement drum that looks new, with smooth coating over-all.
I have a complete parts unit but the drum in it has other issues
(several holes through the scale for unknown reasons and in
general not as nice as the one I want to replace, other than that
the shellac isn't bubbled).  As removing the drum doesn't look
like a trivial excercise, I would buy a complete parts unit if
necessary.  Or just the drum.

Condition of the rest of the parts unit would not matter so long
as the drum and scales were free of flaws.

There was at least one other contractor who built ZM-3A's.  No
way of telling whether their drums are identical to the Ecco ones,
other than the hard way.

On a related subject, I'm also looking for the outer carrying case.
Don't know why but except for one belonging to another list member,
all that I've seen or heard of recently are less transit case.
Which means there must be some floating around.  Case is gray,
probably heavy, and has "Capacitor Analyzer ZM-3A/U" in black
letters on the removable front cover.

73
Robert Downs - Houston