[Elecraft] EFHW
Kevin - K4VD
kevin at k4vd.net
Thu Feb 9 19:03:17 EST 2017
Thanks Scott. I use the Par EndFedZ EF-10/20/40 and EF-20/40 depending on
what's in the bag at the moment. These are resonant and I'm assuming the
KX3 tuner is enough to keep the SWR low. The radio always seems happy.
I will add up to 8 feet of wire next time out and try some A/B tests.
During this thread there's been a couple of comments that kind of challenge
my way of thinking. I would never have thought a random wire would be
considered superior to a resonant antenna. I also don't equated high SWR
with high loss. My home antenna is comprised of a dipole fed with 600 ohm
ladder line through a 4:1 BALUN. It's about the best antenna setup I've
ever had and I use it on all bands 80 (where it is resonant) through 6. The
KX3 and the Flex tunes it nicely and the log fills up.
Threads like this get me questioning everything I thought I knew. That's
not a bad thing.
Kev K4VD
On Thu, Feb 9, 2017 at 5:37 PM, K9MA <k9ma at sdellington.us> wrote:
> On 2/9/2017 16:28, Kevin - K4VD wrote:
>
>> I work portable with about 1 ft of coax to my end-fed. Never really had a
>> problem making contacts. Guess I could do a lot better with a longer coax
>> or with a counterpoise?
>>
>> Kev - K4VD
>>
> It wouldn't hurt to add a counterpoise of 6-8 feet, just a single wire on
> the ground opposite the antenna, but it may not make much difference. (I'm
> assuming EFHW, not random or quarter wave wire.) That short coax, the
> radio, the headphone cable, etc. is probably serving as an adequate
> counterpoise. You definitely do NOT want a longer coax, unless there's a
> matching network at the feedpoint to keep the SWR low. Even then, the long
> coax would only be advantageous if it allows you to place the antenna in a
> more favorable location.
>
> 73,
>
> Scott K9MA
>
>
> --
> Scott K9MA
>
> k9ma at sdellington.us
>
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