[Elecraft] K3 mobile

[Tom Hammond]

RTV is very often available as gasket maker/filler from your friendly
neighborhood auto parts store.

Permatex #16B, Black, Silicone Adhesive Sealer IS NOT SUITABLE,
                CONTAINS ACETIC ACID

PERMATEX #598B, Black, Hi-Temp RTV Silicone Gasket Maker IS SUITABLE and
                 DOES _NOT_ CONTAIN ACETIC ACID

73,

Tom Hammond   N0SS


At 00:30 10/23/2008, David Cutter wrote:
>
>Cheap RTVs such as used in bathroom sealant has 
>a vinegar smell and will attack copper.  In a 
>small confined space inside a radio that's not 
>good.  In an open outdoor environment where the 
>gas can escape it's not such a problem.  Dow 
>Corning and others make RTVs with benign 
>contents, but at a considerable increase in cost.
>
>Surface mount components have practically no 
>exposed copper and pcb tracks are not exposed, 
>so, I wonder whether the acetic acid attacks the tin coated contacts.
>
>David
>G3UNA
>----- Original Message -----
>From: <mailto:K2TK at att.net>Bob
>To: <mailto:mzilmer at verizon.net>mzilmer at verizon.net
>Cc: <mailto:elecraft at mailman.qth.net>elecraft at mailman.qth.net
>Sent: Wednesday, October 22, 2008 7:35 PM
>Subject: Re: [Elecraft] K3 mobile
>
>OK...  May I ask why?
>
>I have seen it done in commercial products and I 
>recently did it when I was assembling
>my SoftRock receivers because of my concerns with the #30 wire breaking.
>
>The two reasons I might think of would be any 
>detuning effect or fear of the material used
>attacking the wire insulation.
>
>Any wisdom on this subject out there?    I did 
>not see or am not aware of the Elecraft
>advisory.
>
>73,
>Bob
>K2TK
>
>
><mailto:mzilmer at verizon.net>mzilmer at verizon.net wrote:
>>I have seen the use of dope, sealers and so on 
>>strongly discouraged by Elecraft.
>>matt, W6NIA
>>
>>
>>Oct 22, 2008 10:30:51 AM, <mailto:km5q at mac.com>km5q at mac.com wrote:
>>There are at least two ferrite core transformers in the K3 that are
>>supported only by their thin wires. I'm concerned that they may not
>>survive a mobile environment. It would take only a dab of RTV
>>(silicone adhesive sealant) to secure them, but I don't know if this
>>has been discusses or approved.
>>
>>Windy KM5Q
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>
>
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