Date: Tue, 21 Feb 2017 21:24:16 -0500
From: Hans Hammarquist <hanslg@aol.com>
To: towertalk@contesting.com
Subject: [TowerTalk] Fwd: What am I missing....balun
This doesn't explain why PTFE should not keep up outdoors. Rather the opposite.
Hans - N2JFS
-----Original Message-----
From: Guy Olinger <k2av@contesting.com>
To: john <john@kk9a.com>
Cc: Towertalk <towertalk@contesting.com>
Sent: Fri, Feb 17, 2017 3:00 pm
Subject: Re: [TowerTalk] What am I missing....balun
See https://www.coleparmer.com/tech-article/uv-properties-of-plastics
73, Guy K2AV
## The outer jacket on 393 and 142 is not PTFE. PTFE is used for the
dielectric inside. PTFE aka terflon.
## Outer jacket is FEP-9 . These cables are made by everybody and their
dog.
Made in the UK, china, rfs makes it, so does times microwave, belden, and a
bunch more.
I suspect its either a quality control issue, or a tweak in the formulae,
rendering it semi useless
for UV outdoors. Im not going to take a chance, and will 88 or 33 tape it the
entire length.
Which is not vey much, so not an issue. Its too expensive as is, and 33 or 88
tape is cheap
insurance.
Jim VE7RF
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