[ARC5] Rusty Tuning Cap

[Geoff]

There are water based solutions (called derusters, rust removers, etc) used 
by automotive and other restorers that remove iron oxide, do not attack the 
base metal or aluminum, copper, brass, etc.

The cap would have to be removed and dunked per instructions.

The problem with those is that after drying flash rust will develop unless 
prevented. I dip caps in "Prep Step" and let dry. In a dry indoor enviroment 
there hasnt been any more rust for a decade or more.
Ive also stored dipped or sandblasted auto parts outside for over a year in 
an open shed or under a tarp.

Carl


> Any of y'all ever try to repair a rusty tuning cap?  I have an NC-270 I 
> picked up and it has a bit of rust on the chassis.  Most of it is not a 
> problem and I have treated it, but the main tuning cap is pretty rusty.
>
> The cap plates are not rusty but the frame is, which I do not see as a big 
> problem, except for the area on one end where the "wiper" is for the 
> shaft.  That is so rusted that there is no way any decent electrical 
> contact is occurring.  I doubt the feasibility of dismantling it and 
> cleaning it up with insuring complete destruction.
>
> I am checking on a replacement, but do any of y'all have any suggestions?
>
> Thanks.
>
> Wayne
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