[TowerTalk] waterproofing big #31 clamp-on choke

[Jim Thomson]

Date: Fri, 30 Jun 2017 20:03:41 -0500
From: Kim Elmore <cw_de_n5op at sbcglobal.net>
To: jim at audiosystemsgroup.com
Cc: towertalk at contesting.com
Subject: Re: [TowerTalk] waterproofing big #31 clamp-on choke

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

## Are they hygroscopic ..or not ?     Put a single core into a dish  or tub of water overnight...at room temp.   Take a 2nd core..and toss it into your deep freezer section.  See what happens the next day.  Take the 1st core and toss it into
the deep freeze, see if it cracks the following day. 

Jim  VE7RF