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Re: [TowerTalk] waterproofing big #31 clamp-on choke

To: jim@audiosystemsgroup.com
Subject: Re: [TowerTalk] waterproofing big #31 clamp-on choke
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Fri, 30 Jun 2017 20:03:41 -0500
List-post: <mailto:towertalk@contesting.com>
Unless the ferrite material is porous such that water can penetrate the 
surface, I don't understand their disintegration. I thought they were 
essentially like glass. If they aren't, and if water can penetrate the surface, 
then freeze/thaw cycles will certainly damage them. 

Kim N5OP

"People that make music together cannot be enemies, at least as long as the 
music lasts." -- Paul Hindemith

> On Jun 30, 2017, at 19:51, Jim Brown <jim@audiosystemsgroup.com> wrote:
> 
>> On 6/30/2017 4:09 PM, N2TK, Tony wrote:
>> Last winter I had a couple FT-240 Fair-Rite #31 cores on my receive antennas
>> break. They were on the ground here in upstate NY.
> 
> Thanks Tony. Tell me about the mechanical details -- was this a single choke 
> on two cores, or two single-core chokes? Was freeze/thaw a factor -- that is, 
> did  they get wet/icy?
> 
> The only reason I recommend NOT enclosing chokes is to maximize dissipation 
> of any heat produced. That's not an issue on RX lines.
> 
> 73, Jim K9YC
> 
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