RG-8X

[Richard-6]

I’m seeking recommendations for RG-8X coax with the lowest loss. The total run will be about 100 feet.

Cheers!

Richard Kunc — W4KBX

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[Elecraft mailing list]

Richard..If you are set on using the small size the real LMR-240 is the best bet..also may want to check with MFJ.. they now carry a very good line of coax!!
    73s Bob W5RG


      From: Richard <[hidden email]>
 To: Elecraft Reflector <[hidden email]>
 Sent: Monday, February 26, 2018 8:35 AM
 Subject: [Elecraft] RG-8X
   
I’m seeking recommendations for RG-8X coax with the lowest loss. The total run will be about 100 feet.

Cheers!

Richard Kunc — W4KBX

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[Bob McGraw - K4TAX]

In using ARRL Transmission Line for Windows application:

RG-8X  Belden 100 ft @ 50 MHz has 2.5 dB loss

LMR-240 Times Microwave  100 ft @ 50 MHz has 1.7 dB loss

RG -213 Belden 8267 has 1.5 dB loss at 50 MHz

RG-8 Belden 9913 has 0.88 dB loss for 100 ft at 50 MHz.  {Due to the
nature of this line having a lot of air content, the reason for low
loss,  it is reported to have moisture condensation issues.   Thus I
would avoid it for outside use.}

Andrew LDF4-50A which is 1/2" hard line has 0.44 dB loss at 50 MHz

These were just a few I checked.  All values calculated for 100 ft, with
a 1:1 SWR at 50 MHz.

I would cringe at the thought of putting up a fine antenna and loose any
performance on transmit and receive due to feed line loss.   In my case
I have a 4 element HyGain 6M yagi which is fed with about 75 ft of
Andrew LDF4-50.  I selected the 4 element on a 12 ft boom as opposed to
the 5 element on a 12 ft boom.   The side lobe pattern on the 4 element
yagi is much cleaner, hence noise off axis is lessened.

I didn't see any polar response plots on their site so I can't comment
on overall performance of the 6OWL6.

73

Bob, K4TAX

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[donovanf]

Hi Richard,


Please provide a little more information so that your question can
be answered more accurately.


At what frequencies will you be using your coax?


Will your coax be buried or laid on the ground, or will it not be
in contact with the ground at all?



Many coaxial cables have a vinyl jacket which is very susceptible
to moisture penetration if buried or laid on moist ground.


Are rodents (squirrels, mice, etc) a problem in your area?


Vinyl jacketed coax is very susceptible to rodent damage which
will quickly increase your coax loss.


73
Frank
W3LPL


From: Richard <[hidden email]>
To: Elecraft Reflector <[hidden email]>
Sent: Monday, February 26, 2018 8:35 AM
Subject: [Elecraft] RG-8X

I’m seeking recommendations for RG-8X coax with the lowest loss. The total run will be about 100 feet.

Cheers!

Richard Kunc — W4KBX

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