Re: {Collins} KWS-1 ceramic trimmers stuck.

I had a thought - heat might be more effective than cold. Likely the lubricant on the capacitors has hardened over time. Either that or something that is not supposed to be in there got in there and seized up.

A little heat from a heat gun may loosen them up. I have had great results with switch shafts that are frozen.


On Nov 25, 2013, at 12:06 PM, bellasjohn497@xxxxxxxxxxxxxxx wrote:

> Gary here is values of the trimmers and their Collins part numbers along with the schematic number.
> Caps are  C 267 at 8.0 to 75.0 mmf  Collins part # 917 1075 00.
>                 C269  at 8.0 to 75.0 mmf  Collins part # 917 1075 00.
> They are both the same value and part # round ceramic parts on a phenolic base with screw holes for mounting.  I am not sure If my camera will focus for such a close shot.
> Thanks  a bunch, I will try my camera later this evening and maybe get a few dimensions then also.  John
> From: Gary Follett <dukeshifi@xxxxxxxxxxx>
> To: "bellasjohn497@xxxxxxxxxxxxxxx" <bellasjohn497@xxxxxxxxxxxxxxx> 
> Sent: Monday, November 25, 2013 12:06 PM
> Subject: Re: {Collins} KWS-1 ceramic trimmers stuck.
> I think I have a few of these trimmers.
> Can you send values and photo with dimensions?
> Gary
> On Nov 25, 2013, at 10:34 AM, bellasjohn497@xxxxxxxxxxxxxxx wrote:
> > Hello to all Collins fans !!
> > I have been doing an alignment on my kws-1 and have found 2 stuck trimmers one on 20 meter band and one on 15meter band, both are the ones closest to the driver tubes 6cl6.
> > I tried some lateral force as per Butch K0BS video and this has not worked yet, tried to pry the two ceramic sections lightly too but to no avail.
> > Was wondering if a shot of component cooler on top ceramic might help to loosen due to slight contraction when being cooled? and to prevent future sticking is there
> > anything that can be applied to act like a lubricant?? like maybe silicon spray ?????  Last time aligned about 2 years ago I had no sticky trimmers. 
> > Many thanks ahead of time, And thanks to all who replied to my grounding problem / question about a month ago, the transmitter now has a grounded power cord / line,
> > It works with no problems.  John Bellas  KC2UVN.
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