[R-390] R390 (non-A) broken tuning slug - FIxed!

[Kevin McGrath]

Thanks again to all who responded. The slug has been repaired and the 16-31 MC bands are working again.


 I used dental pick to lift the springs offthe rack, and removed the rack. Happily the slug was not stuck and it fell right out unexpectedly as soon as the rig was a bit over vertical. The slug bounced off the workbench but I caught it in one hand before it hit the concrete floor, with the other hand balancing this 85lb boat anchor. Didn't drop either one.


The slug had parted cleanly just below the spring. I used superglue to put it back together and burnished the edges lightly with a jewelers file to make sure it moved easily once back in the coil. There was a bit of trouble getting the springs back on -- and almost did drop one back down the hole. A piece of dental floss tied around the upper end of the spring saved the day.  (I dread having to remove the RF unit and thus getting into the mechanical aspects of the gear train. But I suppose that will come in time).

At any rate, the R390 is all back together an the 16-31 MC bands are working again.

This list is a phenomenal resource. I went back and read two years of the archives and most of the 'pearls'. No way I could have tackled bringing my R390 and R390A back to life without the combined wisdom, hint and kinks of this group.


Thanks, 

Kev




>________________________________
> From: Don Heywood <wc4g at knology.net>
>To: Kevin McGrath <kj_mcgrath at yahoo.com> 
>Sent: Sunday, July 7, 2013 1:03 PM
>Subject: Re: [R-390] R390 (non-A) broken tuning slug
> 
>
>
>
>Hi Kevin, Roger gave you a pretty good explanation in how to remove and 
>repair your broken slug. However, the old R-390 version that you have does 
>not have the adjuster plates above each slug as he tried to explain, the "A" 
>version has these. Your slugs simply are threaded thru the slug rack and 
>adjusted with your Bristol style driver. Preset the repaired slug to the 
>same height as the other two and you will be close.
>
>Good Luck with your repair. I worked for quite a while with a KWM-2 trying 
>to to an alignment before I found a broken slug. It was easily repaired 
>(keep it straight while gluing) and the radio tuned up fine.
>
>Don WC4G
>Charleston, SC 
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