[Elecraft] RG-8X

[Richard]

The problem is often I get an answer or a request for more info, and I reply without realizing that it goes to an individual’s e-mail address, not to the selector at large. It almost happened with this one.

I was talking about 75 to 100 feet on 50 MHz.

I plan to use DXE’s 400MAX, with which I have had excellent results before.

Richard - W4KBX

> On Feb 26, 2018, at 8:23 PM, donovanf at starpower.net wrote:
> 
> 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: john at kk9a.com 
> To: elecraft at 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 
> 
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