Hi Grant
The issue with some black insulators - with RX antennas they might not go up
in smoke, however they are still not a good insulator at RF - even for RX
antennas.
When coloring black - no carbon should be used - those can be a good
insulator.
I have been "burned" by black in the past.
Why take the chance?
73
Tim K3LR
-----Original Message-----
From: Topband [mailto:topband-bounces+k3lr=k3lr.com@contesting.com] On
Behalf Of Grant Saviers
Sent: Tuesday, August 3, 2021 6:47 PM
To: topband@contesting.com
Subject: Re: Topband: Materials for Beverages?
N7QT & I verified that black ring screw-in insulators are too conductive
for one or two transmit radials on 160m. Lot's of arcs and smoke. I
now use the yellow 4" long barb wire insulators screwed to trees to
support 160m elevated Tx radials.
Black may not be a problem with Beverage field strengths.
Grant KZ1W
On 8/3/2021 11:16, Tim Duffy wrote:
> Two things concern me about black. UV and possible carbon used to color
> black - which may be conductive at RF frequencies
>
> 73
> Tim K3LR
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces+k3lr=k3lr.com@contesting.com] On
> Behalf Of Drew Vonada-Smith
> Sent: Tuesday, August 3, 2021 1:02 PM
> To: topband@contesting.com
> Subject: Topband: Materials for Beverages?
>
> Gene,
>
> I have used those and others in that series with only fair results. They
do
> break more often than I'd like. I replace about 10% of them per year,
which
> is acceptable given that they are cheap. But I have not found anything
> better.
>
> FYI - I'd be happy to use black ones, but have never seen them. My local
> farm store carries the exact same bright yellow ones you listed. A link
to
> a "preferred type" would be welcome. I'm a bit of a birder and have not
> heard of any hummingbird death issues. References?
>
> 73,
> Drew K3PA
>
> ________________________________
>
>
> Toda
> Date: Mon, 2 Aug 2021 16:35:47 -0400
> From: Gene Smar <ersmar@verizon.net>
> To: topband@contesting.com
> Subject: Topband: Fwd: [TowerTalk] Fwd: Amazon recommends "Zareba
> ITY-Z Standard..." and more
> Message-ID: <78ef5d0e-0d78-c118-0819-e5ccc2dd72f3@verizon.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> FYI.? Materials for Beverages?
>
> 73 de
> Gene Smar? AD3F
>
>
>
> Hello Gene Smar,
>
> We found some items we think you might like.
>
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>
>
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband
Reflector
>
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband
Reflector
>
_________________
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_________________
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