"Solid" in this context means not braided, and that is what the inner
bonded foil shield is in my RG-6 (actually F-6, for CATV). I left out
"foil", sorry.
73 Mike
W0BTU
On Thu, Apr 9, 2020, 12:19 PM K9FD wrote:
> Ever see RG6 with a solid aluminum shield?
>
> > One thing that hasn't been
Ever see RG6 with a solid aluminum shield?
One thing that hasn't been mentioned here is how the aluminum shield,
jacket, and dielectric behaves. I'm pretty sure that the CoE/°F of
aluminum is *more than twice* that of copper and steel.
I am speaking specifically about a solid aluminum shield
One thing that hasn't been mentioned here is how the aluminum shield,
jacket, and dielectric behaves. I'm pretty sure that the CoE/°F of
aluminum is *more than twice* that of copper and steel.
I am speaking specifically about a solid aluminum shield bonded to the
dielectric.
Braided shields
More on the cable testing,
Thinking along the lines Rick was I decided to retest the same cable to see
if the results were repeatable.
The original phase shift for both room temperatures was 59 deg. F and 23 deg. F
Results were -74.6 degrees and -0.61 dB to -74.6 deg and -0.58 dB loss
: Richard (Rick) Karlquist
Sent: Wednesday, April 8, 2020 2:00 PM
To: Lee STRAHAN ; topband@contesting.com
Subject: Re: Topband: RG-6 Delay cables
On 4/8/2020 1:28 PM, Lee STRAHAN wrote:
Even if the copper center conductor expands, the way the cable connectors
are made allows the copper
: Wednesday, April 8, 2020 8:59:58 PM
Subject: Re: Topband: RG-6 Delay cables
On 4/8/2020 1:28 PM, Lee STRAHAN wrote:
> Even if the copper center conductor expands, the way the cable connectors are
> made allows the copper to simply push in the connector past the connection
> p
: Re: Topband: RG-6 Delay cables
On 4/8/2020 1:28 PM, Lee STRAHAN wrote:
> Even if the copper center conductor expands, the way the cable connectors
> are made allows the copper to simply push in the connector past the
> connection point maintaining its physical length.
Very ast
Subject: Re: Topband: RG-6 Delay cables
On 4/8/2020 1:28 PM, Lee STRAHAN wrote:
> Even if the copper center conductor expands, the way the cable connectors
> are made allows the copper to simply push in the connector past the
> connection point maintaining its physical length.
Ve
On 4/8/2020 1:28 PM, Lee STRAHAN wrote:
Even if the copper center conductor expands, the way the cable connectors
are made allows the copper to simply push in the connector past the connection
point maintaining its physical length.
Very astute. You may have explained this paradox.
Hi Rick,
Agreed, the numbers surely seemed too good to be true. I also researched
cable delays versus temperature at various manufacturers. I found no data at
the low bands we use. I found just enough information to make me do the test. I
am confident the answers I recorded are
On 4/8/2020 12:28 PM, Lee STRAHAN wrote:
What I do know about that also is mathematically those 8 elements theoretically
can produce an RDF of right at 16 dB. The rub is the element amplitudes and
phasing has to be controlled to some remarkable unobtainable accuracies to do
that. Just
On 4/8/2020 10:37 AM, Lee STRAHAN wrote:
Good morning from Oregon Top-Band people,
Cable loss was -.61 dB at 59 Deg. F, And -.58 dB at an averaged cable
temperature of 23 Deg. F.
59 Deg. F 23 Deg. F
1 - 74.59 DEG -74.60 DEG.
2 - 74.59 DEG -74.60 DEG.
3 -
@contesting.com
Subject: Re: Topband: RG-6 Delay cables
Interesting Lee. I guess I never thought anything about delay lines in our
weather here. I have RG-6-like cables on all my 4-squares.
I was unaware electrons cared whether it was +35*C or -35*C (or general temp
range here in NB)
What prompted you
On 4/8/2020 11:48 AM, Mike Smith VE9AA wrote:
I was unaware electrons cared whether it was +35*C or -35*C (or general temp
range here in NB)
Hi Mike,
The possible variables are variations in the electrical properties of
the transmission line with temperature, which are factors of the
Interesting Lee. I guess I never thought anything about delay lines in our
weather here. I have RG-6-like cables on all my 4-squares.
I was unaware electrons cared whether it was +35*C or -35*C (or general temp
range here in NB)
What prompted you to do such testing?
Thanks
Mike
On 4/8/2020 10:37 AM, Lee STRAHAN wrote:
Cable loss was -.61 dB at 59 Deg. F, And -.58 dB at an averaged cable
temperature of 23 Deg. F.
Great work, Lee. Thanks.
73, Jim K9YC
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Lee,
Tnx for the info and taking the time for the test. The differences are in
the noise level.
Stay safe
N2TK, Tony
-Original Message-
From: Topband On
Behalf Of Lee STRAHAN
Sent: Wednesday, April 8, 2020 1:38 PM
To: topband@contesting.com
Subject: Topband: RG-6 Delay cables
Good
Good morning from Oregon Top-Band people,
I decided to re-do some previous tests of the common 75 ohm RG-6
cable I use and is used for delay cables in many places for top-band receiving
systems.
I just thought I would share the results of yesterday's tests.
I took a delay cable that I
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