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 <d...@k0dxv.com>
To: elecraft@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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