If you can see the board impressions in the coax, it's toast. Replace it.
You didn't say what kind of coax it is, but 9913 is very easily crushed.
According to Mosley, the maker of many military antennas, that's why the
military doesn't use it on the ground or in the ground. They use RG213,
On 10/22/2011 9:33 AM, n...@n5ge.com wrote:
According to Mosley, the maker of many military antennas, that's why the
military doesn't use it on the ground or in the ground. They use RG213, which
will not crush when run over by vehicles with tires.
That information is probably rather dated.
The point made by Mosley was that the 9913 *style* coax can be crushed easily
due to the material used for insulation between the center conductor and the
shield. RG213 *style* coax does not suffer from that deficiency.
I suppose I could have looked up the MIL STD number of both the coaxes and
On 10/22/2011 1:02 PM, n...@n5ge.com wrote:
The point made by Mosley was that the 9913*style* coax can be crushed easily
due to the material used for insulation between the center conductor and the
shield. RG213*style* coax does not suffer from that deficiency.
Understood, Tom. And yes,
On 10/20/2011 6:21 PM, gold...@charter.net wrote:
I apparently have a bigger problem with RF in the shack and it has
nothing to do with the loop.
Hi Don,
Your email, and some of the solutions offered, reflect some common
misconceptions about RFI, including an earth connection as a solution
On 10/20/2011 8:24 PM, Ron D'Eau Claire wrote:
I wholeheartedly endorse Don's comments.
I do too.
A good practice with any antenna installation is to check the SWR on each
band for which it is used, and make a note of that.
While in Comm Officers' School at Keesler AFB many years ago, I was
As Jim Brown says: if all these problems came on suddenly, focus on what
parts of the installation have CHANGED.
You may well have identified one:
Right now I am thinking that I have a bad coax line outside of the
house. The reason for this is that I had a new propane tank installed
and
...@ifwtech.co.uk
To: elecraft@mailman.qth.net
Sent: Friday, October 21, 2011 1:12 PM
Subject: Re: [Elecraft] Now General RF Issue WAS 160m loop experiment a big
failure
As Jim Brown says: if all these problems came on suddenly, focus on what
parts of the installation have CHANGED.
You may well have identified
On 10/21/2011 1:12 PM, Ian White GM3SEK wrote:
Is there any chance that the shield has been pulled apart, and is now
completely open-circuit? A broken shield connection can be a major cause
of RFI, as RF currents can appear in very odd places in their search for
a new return path.
I also like
Is this a helpful list, or what?
Wayne
On Oct 21, 2011, at 1:21 PM, Jim Brown wrote:
On 10/21/2011 1:12 PM, Ian White GM3SEK wrote:
Is there any chance that the shield has been pulled apart, and is now
completely open-circuit? A broken shield connection can be a major
cause
of RFI, as
Dear Group,
I apparently have a bigger problem with RF in the shack and it has
nothing to do with the loop.
I have been running a successful shack on the second floor of my house
and as of Friday last week when I installed the loop I have had nothing
but RF problems. I thought on Saturday
Don,
You MFJ259B can help you locate the fault. Look at the instructions for
the 259B and in particular the Distance to Fault section.
Yes, crushed coax can cause severe discontinuities, including actual
shorts in the coax - not unlikely for coax being run over by heavy
equipment.
A shack
Subject: Re: [Elecraft] Now General RF Issue WAS 160m loop experiment a big
failure
Don,
You MFJ259B can help you locate the fault. Look at the instructions for
the 259B and in particular the Distance to Fault section.
Yes, crushed coax can cause severe discontinuities, including actual
shorts
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