[TenTec] OT - Desk Microphone Switch Issue

[Jerry Haigwood]

Bob,
    I have always been told silver oxide is almost as conductive as silver
and doesn't need to be cleaned like gold.

Jerry W5JH
"building something without experimenting is just solder practice"

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Bob McGraw
- K4TAX
Sent: Thursday, July 03, 2014 10:21 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] OT - Desk Microphone Switch Issue

One easy and convenient way to clean relay contacts and key contacts is to 
use a common white paper business card.

And better yet, if you have a friend that is an artist, get a scrap piece of

their acid free paper.  Cut it into strips, place one between the contacts 
and gently close the contacts and pull the paper out.  You may have to do 
this two or three times but you will end up with nice clean shiny contacts 
and a couple of black marks on the paper.  Oh, those black marks residing on

the paper are silver oxide.

73
Bob, K4TAX


----- Original Message ----- 
From: "K8JHR" <jrichards at k8jhr.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Thursday, July 03, 2014 9:24 PM
Subject: Re: [TenTec] OT - Desk Microphone Switch Issue


> Hi Stuart - I appreciate your take on this.  And yet...     ;-)
>
> A)   The Caig web site is particularly clear using such solvents on such 
> switches is contraindicated.  It recommends against using solvents on 
> switches that employ porous phenolic wafer insulators.
>
> B)   While I appreciate the risk of filing down the metal... I am 
> confident my burnishing tool ...er... "barely scratched the surface." It 
> is not like I used coarse sand paper or a harsh metal file.   ;-)
>
> I considered using a non-abrasive metal polish, but that would have been 
> awkward and would likely get the insulating wafers wet, which was a 
> paramount concern.
>
> Happy days - OM.
>
> ----------------------  JHR ---------------------------
>
>
>
>
>
> On 7/3/2014 9:34 PM, Stuart Rohre wrote:
>> DeOxit combines the cleaner, deoxide agent, and contact lubricant into
>> one application.
>
>> A burnishing tool should only be used if all else fails, as you are
>> removing metal forever, if too vigorously used.
>>
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