[R-390] Strange slugs in my RF deck

[Barry]

Hi Grayson,

Sounds like someone was desperately trying to make some repair parts.

The slugs should have a small spring affixed to the slug with the other end affixed to a set screw that has a spline drive.  The slugs for the RF deck are different from the ones in the IF deck - not so much size-wise as I think both are the same size, but the composition of the two slugs are different so they're not electrically interchangeable.

I'm pretty sure you can locate good slugs from either someone on this list or possibly a place like Fair Radio, etc.

BTW, these are meant to be assembled dry.  Do not use any liquid lubricant in them.

Good luck with it,
Barry - N4BUQ

----- Original Message -----
> From: "Grayson Evans" <wa4gvm at gmail.com>
> To: r-390 at mailman.qth.net
> Sent: Sunday, November 9, 2014 6:52:01 AM
> Subject: [R-390] Strange slugs in my RF deck
> 
> I am disassembling/restoring a very early Collins R390A.  My first restore,
> so going slow.
> I am disassembling the RF deck and notice that there are a variety of slug
> types in the coils.
> Some have a small spring attached from the slug to the adjustment screw, some
> have just a stiff wire between slug and screw, and some have both (a short
> spring with a wire attached to the slug).  Someone replaced about 5 or 6 of
> these in the past, the screws holding the adjustment screw triangle plate
> look like floor sweepings, rusty flat head screws.
> What are the slugs supposed to look like?
> 
> The other strange thing is that a few of the replaced slugs seem odd, they
> are a small diameter rod of metal (half the diameter of regular slug)
> wrapped in cardboard.  Looks like someone made them in the field.  Anyone
> seen these?
> 
> 
> 
> Grayson
> TA2ZGE - Ankara, Turkey
> KJ7UM
> Follow the Hollow-State Design Blog
> hollowstatedesign.tumblr.com
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