[Boatanchors] Cleaning Ceramic Trimmers

[jeremy-ca]

Altho silver oxide, AgO, is itself conductive what is seen on components may 
not be due to absorbed contaniments creating an insulating surface.

Having an intermittent silver plated BNC connector pair become intermittent 
for instance is a well documented occurance.

AgO on variable capacitor plates is OK but the rotor may have to be turned a 
few times during an alignment to maintain a solid contact with the wiper.

Carl
KM1H


----- Original Message ----- 
From: "Al Parker" <anchor at ec.rr.com>
To: "JT Croteau" <jt.n1ese at gmail.com>; <boatanchors at mailman.qth.net>
Sent: Friday, February 08, 2008 5:50 PM
Subject: Re: [Boatanchors] Cleaning Ceramic Trimmers


> Hi JT,
>    I think the same question came up recently on another list, but the 
> answer's about the same  -  don't do anything.  The "tarnish" is just 
> that, oxidation on silver plated components.  Silver oxide is conductive 
> and doesn't need to be cleaned of for the component to work, and cleaning 
> could put some chemical, etc., in there to couse more real 
> corrosion/problems.  IF the ceramic portion is dirty, then just use soap & 
> water, then rinse well with distilled water.
>    It's a good buyers ploy at a fleamarket/fest if there seller has a box 
> of cruddy looking old connectors, etc.  Juat point out how dirty they are, 
> if he doesn't know better, you might get a real bargain ;-)  Of course the 
> late model oriental sourced stuff is really just plain cruddy and not 
> silver plated.
> 73,
> Al, W8UT
> New Bern, NC
> www.boatanchors.org
> www.hammarlund.info
>
> ----- Original Message ----- 
> From: "JT Croteau" <jt.n1ese at gmail.com>
> To: <boatanchors at mailman.qth.net>
> Sent: Friday, February 08, 2008 12:48 PM
> Subject: [Boatanchors] Cleaning Ceramic Trimmers
>
>
>> What is the best way to go about cleaning something like this (220KB 
>> file):
>>
>> http://n1ese.qrpradio.com/trimmer-2.jpg
>>
>> Thanks
>>
>> -- 
>> JT Croteau, N1ESE - Manchester, NH (FN42gx)
>> Contest Manager, TARA Skirmish
>> _______________________________________________
>>
>
>
> _______________________________________________
>