[Elecraft] EFHW

[Mel Farrer]

Do yourself a favor sometime and measure the 2:1 SWR bandwidth and use the tutorial to calculate how much loss you really have.  Just for grins.....  It gives you a bench mark.....

Mel, K6KBE


      From: Doug Person <doug at k0dxv.com>
 To: elecraft at mailman.qth.net 
 Sent: Thursday, February 9, 2017 2:22 PM
 Subject: Re: [Elecraft] EFHW
   
I am feeding my end-feds with over 100 feet of coax and they work just fine.

Doug - K0DXV


On 2/9/2017 1:21 PM, K9MA wrote:
> Well said, Bill!
>
> 73,
>
> Scott  K9MA
>
> On 2/9/2017 10:39, Bill Leonard N0CU wrote:
>> The reason your antenna was a lot less finicky with a bit of coax is 
>> that the
>> EFHW antenna requires a return path for the RF field. Theoretically, 
>> without
>> a return path, the antenna won't radiate at all. The recommended 
>> setup for
>> this antenna is for a .05 wavelength counterpoised to be used. EZNEC 
>> models
>> indicate that there is little benefit to going much longer than .05
>> wavelengths, and a quarter wavelength is actually less effective than 
>> the
>> shorter lengths.  If no counterpoise is used, then coax shield 
>> becomes the
>> counterpoise by default.
>>
>> Bill  N0CU
>>
>>
>>
>>
>
>

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