[TowerTalk] waterproofing big #31 clamp-on choke

[Kim Elmore]

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 at 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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