[Elecraft] ARRL book on receiving antennas

Mel Farrer farrerfolks at yahoo.com
Sun Sep 9 16:05:59 EDT 2018


You said it Jim, but in to many words, It is installation specific, period.
Mel, K6KBE

      From: Jim Brown <jim at audiosystemsgroup.com>
 To: elecraft at mailman.qth.net 
 Sent: Sunday, September 9, 2018 1:03 PM
 Subject: Re: [Elecraft] ARRL book on receiving antennas
   
On 9/9/2018 12:39 PM, Bob McGraw K4TAX wrote:
> How does one measure transmit antenna efficiency?

Not easily. :)  But NEC provides quite good predictions IF the antenna 
is completely and accurately described in the model. For verticals, that 
includes ground quality. For all antennas it includes height above 
ground, counterpoise, radial systems, and transmission lines.

AND -- propagation reporting systems like WSPR and the Reverse Beacon 
Network (RBN) can provide very good comparisons between antennas IF a 
LOT of reports from  a LOT of stations is averaged over a LOT of time.

73, Jim K9YC

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