[R-390] How to free stuck IF slugs?

[Dennis Wade]

If your slug is actually cracked and not just a binding problem...stop
here.  This probably won't help you.

I had a similar problem with the AGC transformer that binded before I
could complete the adjustment.  I found a tip in the Pearls that
worked quite well.  Put a VERY small shot of WD-40 into the top of the
transformer and let sit overnight.  Problem solved (for me).

          Good luck.

          Dennis



On 10/8/05, James Cottle <jim_cott at earthlink.net> wrote:
> OK, so I finally got around to doing an IF alignment on my R-390A. On
> the first fixed IF transformer, the primary slug (bottom) moves so that
> I can peak the diode load at 455Khz. The top slug, however, is stuck to
> where an unsafe amount of torque will still not allow me to turn it in
> the coil form. What does one do to free these ferrite slugs in the coil
> form? I know that turning it with force is definitely NOT the answer,
> for that has been known to crack the coil form. I am left with the
> question: Does anyone have a tip in how to free these slugs? I know they
> are normally tight, but should not be immovable. I had the same problem
> with the single slug form T208. All I want to do is peak T203 and T208 I
> think these are the numbers...not messing with the staggered IF
> transformers) Any help would be appreciated.
>
> Thanks in advance
>
> Jim
> AC4EA
> San Francisco
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--
Dennis L. Wade
KG6ZI
Carmichael, CA