[R-390] NOS 390 A cabinet

Sun, 5 May 2002 07:35:53 -0700

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1350899355

NOT MINE!!!

Marty

----- Original Message -----
From: "Barry Hauser" <[email protected]>
To: "Paul H. Anderson" <[email protected]>; "Jim Temple" <[email protected]>
Cc: <[email protected]>
Sent: Sunday, May 05, 2002 7:25 AM
Subject: Re: [R-390] R-390 slugs

> Greetings Gang:
>
> I don't know if the weighing approach is the best first step.  As I
recall,
> we found a variety of color marks on the non-A slugs with no particular
> pattern to which was used where.  Then, someone reported first-hand
> knowledge that these were cherry-picked and/or hand matched to the coil
they
> were to go in.  That seemed to end the thread, if I remember right.
>
> What about this?  Hook up a reference coil to a Q-meter and use a caliper
or
> something to control vertical position.  Then read Q and resonant
frequency
> for an assortment of slugs at various positions in the coil.  Maybe figure
> out a pattern to those colors and then weigh them.
>
> Any thoughts?
>
> Barry
>
>
> Jim Temple wrote:
> >
> > > Well, I have been going over the Yahoo archives and it seems that
there
> is
> > > no easy way to judge what slugs and coils match in the R-390.  There
was
> > > considerable discussion about color codes, etc.  Everything you ever
> wanted
> > > to know about R-390 slugs is discussed in the April 1999 time frame,
> give or
> > > take a couple of months, in the Yahoo archives, except the final,
> definitive
> > > answer.  So it seems there is no real answer, beyong going back in
time
> to
> > > question the manufacturers of these items. :-)
> > >
> > > Jim
> >
> Paul Anderson wrote:
>
> > It seems to me that a slug is a bunch of iron powder in a binder.  How
> > tough would it be to dissolve the binder, then weigh the powder to see
how
> > much it takes, then make new ones?  Hmm... I've got a gunpowder scale...
> > maybe time to weigh the slugs themselves with binder to see if I can get
> > weight differences.
> >
> > Paul
> >
> > _______________________________________________
> > R-390 mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/r-390
>
>
> _______________________________________________
> R-390 mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/r-390
>