Any choke I construct is in a box, with a 1/64th inch vent hole to keep
from building a water pump out of my coax.
73s and thanks,
Dave
NK7Z
https://www.nk7z.net
On 05/02/2018 08:12 AM, N2TK, Tony wrote:
I have had several FT-240 #31 cores crack with big chunks out of them or
break in pieces. They were just lying on the ground with several turns of
RG6 through them. They were in rain, snow and ice for a winter here in
upstate NY. These were for receiving. I will be building new chokes and put
them in a 4 x 4 plastic sealed box.
73,
N2TK, Tony
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Charlie T
Sent: Wednesday, May 02, 2018 7:36 AM
To: [email protected]
Subject: Re: [Elecraft] OT: Protecting Toroidal Cores
Yeas, but it's a destructive test, like checking the opening current for a
fuse.
I would guess that any core, whether ferrite or powdered iron would be
subject to some water absorbs ion in not coated/painted.
73, Charlie k3ICH
-----Original Message-----
From: [email protected] <[email protected]> On
Behalf Of [email protected]
Sent: Wednesday, May 02, 2018 12:56 AM
To: [email protected]
Cc: [email protected]
Subject: Re: [Elecraft] OT: Protecting Toroidal Cores
I have not, but its easy to test!
----- Original Message -----
From: "Jim Brown" <[email protected]>
To: [email protected]
Sent: Wednesday, May 2, 2018 4:44:44 AM
Subject: Re: [Elecraft] OT: Protecting Toroidal Cores
On 5/1/2018 9:30 PM, [email protected] wrote:
Some mixes will absorb water then crack when frozen
Hi Frank,
Have you kept track of which mixes have that characteristic?
73, Jim K9YC
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