[Milsurplus] Repair of small varible capacitors

mstangelo at comcast.net mstangelo at comcast.net
Thu Dec 5 22:49:47 EST 2024


Dave,

I keep flat sheets of that package plastic. I knew it would come in handy someday...

Mike N2MS

> On 12/05/2024 8:32 PM EST David Stinson <arc5 at ix.netcom.com> wrote:
> 
> 
> 
>  A busted nut capacitor in (IIRC) an RAX receiver:
>  https://photos.app.goo.gl/dQzSLaMiFEposh4ZA
>  
>  Two views of the plastic shims installed.
>  Don't really need to put a shim between every plate;
>  just enough to keep all of them apart:
>  https://photos.app.goo.gl/gWUfCeu3ojUixJjP6
>  https://photos.app.goo.gl/VRKb6dLjnXuHNZnW9
>  
>  Set the cap at 50% before installing the shims.
>  Tune carefully. Gorilla-tuning might dislodge 
>  one of the shims, though I've never had it happen.
>  We start at 50% because the adjustment point
>  will likely be closer to that than an end-point,
>  and once we get it tuned we're probably not 
>  going to move it much.
>  I've used this on BC-348, TCS, RAX, Scott Navy,
>  Radiomarine, and others I don't remember.
>  Yes; it changes the specs of the capacitors.
>  No; it doesn't matter enough to notice.
>  
>  73 Dave AB5S
>  
>  GL OM DE Dave AB5S


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