W4KBX hasn't commented about the frequency at which he intends to use 100 feet of RG-8X. 0.24 inch diameter coax -- no matter what type or manufacturer -- isn't the best choice for 100 foot cable lengths at 21 MHz or above.
It s a much better investment to step up to the next larger diameter coax, especially at 50 MHz. LMR400 or LMR400-DB (waterproof flooded coax) are much better choices for 100 foot cable lengths at 21 MHz or above. Of course its hard to beat LDF4-50A but at a cable length of only 100 feet the difference in loss compared to LMR400 is less than 1/2 dB at 50 MHz. You'll never notice the difference. LDF4-50A or LMR600 is an excellent choice for a 200 foot coax length at 50 MHz. Much beyond 200 feet at 50 MHZ and LDF5-50A or LMR900 is a better choice. All of this assumes proper installation. Moisture intrusion resulting from poor installation practices will degrade your investment no matter what coax you select. 73 Frank W3LPL ----- Original Message ----- From: j...@kk9a.com To: elecraft@mailman.qth.net Sent: Monday, February 26, 2018 10:28:05 PM Subject: [Elecraft] RG-8X The original post by W4KBX was this: "I’m seeking recommendations for RG-8X coax with the lowest loss. The total run will be about 100 feet." You cannot defy physics and have low loss with 1/4" coax, no matter who the manufacture is, but RG8X was his criteria. John KK9A Jim Brown K9YC wrote: On 2/26/2018 11:02 AM, Bob McGraw K4TAX wrote: > I did inquire as to the application. To feed a 6M yagi being a 6OWL6W. My thinking, I would cringe at putting up a nice yagi such as this and not use the feedline with the lowest loss possible. Most likely Andrew LDF4-50A hardline. Me too! The 350 ft run from my shack to the 3-el SteppIR is 7/8-in hardline, transitioning to a short length of flexible coax for the rotator loop. Scrounged the hard line used for roughly $1/ft. Loss is about 1 dB on 6M. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to donov...@starpower.net ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
