[R-390] Mechanical Filter Issue

[Cecil Acuff]

High Leigh and Group,

        I did the same thing.  From what I understand there is no problem 
mixing up the slug racks in the A model.  If it were an R-390/URR it would 
be a problem.  Seems all the slugs in the big racks are the same...but don't 
mix them up with the slugs in the small racks.

Someone else jump in here if I am misleading him!

Cecil..
----- Original Message ----- 
From: "Leigh Sedgwick" <bipi at comcast.net>
To: "R390 List" <r-390 at mailman.qth.net>
Sent: Monday, January 03, 2005 11:02 AM
Subject: [R-390] Mechanical Filter Issue


> Hi Gang,
>
> On the a different subject.  My restoration R-390A project
> is just about finished.  I rebuilt the RF deck and recapped
> the IF deck and AF decks.  The smoke test was positive with
> signals on all bands, although it is way out of alignment.
> But I have a couple of issues.
>
> 1.  Three of the four mechanical filters appear to work
> fine.  But, when I switch to the 0.1, 1, and 2 bandwidth
> positions, there are no signals.  Is there any quick check I
> can make to ensure it is the 2 khz mechanical filter and not
> something else in the circuit?  It looks like a bit of work
> to replace and I would hate to go through that effort only
> to find out it is actually something else.
>
> 2.  I tore the RF deck apart with the idea I would get it
> rebuilt within a week or 2.  No such luck...work issues
> caused a significant delay of almost a year before I was
> able to get back and finish it.  During that time, I lost
> track of the ordering of the slug racks and was forced to go
> with a "best fit" approach to reassembling them.  Other than
> the fact that the alignment is totally hosed up, will I be
> faced with any other issues, i.e., are they all identical or
> are there differences I cannot see visually.  I saw
> something on the FAQ page that some are different.  They all
> looked the same to me.
>
> Thanks for any help.
>
> Happy New Year
>
> 73 de Mike
> K7PI
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