[Elecraft] Sloping Terrain vs Feedline Losses

[John Langdon]

The elevated radials should help reduce near field I2R losses, but the sloping terrain will help far field reinforcement and produce 'gain' in some directions, although at 80M it should slope for further than a mile away to really make a difference.  I do not think elevated radials will change the far field reflections from the sloping terrain in any way.

At 80M, even small hardline should have very low loss, so I would go for the location that has the better terrain profile.

73 John N5CQ


-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Craig Smith
Sent: Tuesday, July 12, 2016 5:50 PM
To: Dauer, Edward <edauer at law.du.edu>
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Sloping Terrain vs Feedline Losses

Ted …

I think you are overstating the coax losses.   Even stock RG-11 should be perhaps 0.3 dB/100ft on 80 meters - around 1.5 dB for the 500 ft. run.  

Even so, I would probably gravitate toward the closer location.  With the elevated radials, the effects of the ground conductivity should be minimal.   Not sure if ON4UNs data assume elevated radials or many on-ground radials.  It could be that his estimate of the sloping ground advantage is for the later.   With the closer location, you will have perhaps 1 dB stronger signal in all directions because of the lower feedline loss.

73    Craig   AC0DS

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