I was wondering what is in the box feeding the EFHW-8010, it is a 49;1
UNUN https://myantennas.com/wp/product/mef-330-1k-end-fed-antenna/
W8JI has some interesting information on the counterpoise
https://www.w8ji.com/end-fed_1_2_wave_matching_system_end%20feed.htm
John KK9A
Sent via the Samsung Galaxy 7 edge, an AT&T 4G LTE smartphone.
>
> On Mon, Jul 1, 2019 at 8:18 AM <john@kk9a.com> wrote:
>
>> It needs no tuner or counterpoise and it has great eham reviews! How
>> does this work?
>>
>> John KK9A
>>
>>
>>
>> David Gilbert xdavid at cis-broadband.com
>>
>> The EFHW-8010 gets rave reviews, but I'm fundamentally suspicious of any
>> antenna that covers that wide a range without tuning. There have to be
>> losses somewhere to get that.
>>
>> Those same reviews also claim similar results for installations 6 feet
>> off the ground versus 60 feet. That also doesn't make sense given the
>> effect that ground typically has on the feedpoint of a horizontally
>> polarized antenna without a lot of loss.
>>
>> I couldn't find anyone who had done a real time A vs. B comparison
>> against, for example, a center fed dipole at 40 feet on 20 meters. I'm
>> not saying that the EFHW-8010 isn't a practical single antenna for a
>> given set of constraints, but I'd bet a lot of money that you could do
>> better with a collection of other properly chosen wire antennas if you
>> have the space (presumably you do if you can put up a 130' long
>> EFHW-8010) and some decent trees.
>>
>> And if your ground conductivity isn't too bad, I'd even consider an
>> Inverted-L or two with VOR-type counterpoises before I'd rely on
>> something that physically shouldn't work without a lot of loss ...
>> especially if the distance from the antenna to the shack is short enough
>> that you could use a tuner for operation on multiple bands without a lot
>> of feedline loss due to SWR.
>>
>> My two cents worth ...
>>
>> 73,
>> Dave AB7E
>>
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|