[R-390] Squeaky Slugs

[Barry]

I should mention that this is in regards to the R-390 which doesn't have the adjustment plates for centering the slugs.  Apparently those were added for the R-390A so it looks like I may need to do some spring-straightening.

Thanks again,
Barry - N4BUQ

> I have a squeaky slug and I'm pretty sure it's due to the spring being
> bent/distorted.  I'm wondering if it's possible to straighten a spring without
> causing it to "let go" of the slug.  If not, I think I recall reading where
> talcum powder can be used to lubricate the core.  Is that still a good
> approach?  I know a liquid lubricant is a no-no but not sure what else is best.
> 
> Thanks,
> Barry - N4BUQ