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 EFHW or Icom AH4 
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Post EFHW or Icom AH4
Enfed Fed Half wave antenna or going for the Icom AH4.
Which one would choose and why?

TIA
Keith.

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Hope to catch you on air one day 73 From Sunderland...
M0KLL Last CoG RAE Exam December 2003
Royal Corps of Signals Celebrating its Centenary 1920-2020 CERTA CITO... .


Wed Jul 22, 2020 7:50 am
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 EFHW or Icom AH4 
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Post Re: EFHW or Icom AH4
if you're staying with 100w, and use an appropriate Icom radio, the AH-4 will allow many more options.

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Heil - Icom - Expert - Mosley

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Wed Jul 22, 2020 9:10 am
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 EFHW or Icom AH4 
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Post Re: EFHW or Icom AH4
Yes Rig power !00 W
My thoughts also
However a 7 foot Whip would it work
and would the 7 foot whip be NVIS
Thank you .

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Wed Jul 22, 2020 9:45 am
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 EFHW or Icom AH4 
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Post Re: EFHW or Icom AH4
Advent wrote:
Yes Rig power !00 W
My thoughts also
However a 7 foot Whip would it work
and would the 7 foot whip be NVIS
Thank you .

Simple answer, the 7 foot whip would work to a compromised degree on whatever bands designed to cover via the auto ATU, would it be suitable for successful NVIS?....No! ;)
And that's as simple an answer as you are likely to get.

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Wed Jul 22, 2020 9:56 am
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Post Re: EFHW or Icom AH4
For short whip antenna NVIS... Google "Mobile NVIS antenna"
The are not efficient but the military and aid agencies use them worldwide..

Evan


Wed Jul 22, 2020 10:19 am
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 EFHW or Icom AH4 
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Post Re: EFHW or Icom AH4
GW7UNV wrote:
For short whip antenna NVIS... Google "Mobile NVIS antenna"
The are not efficient but the military and aid agencies use them worldwide..

Evan

And for how NVIS actually works over any appreciative distance google NVIS....you will not find many examples of recommended short whip verticals! ;)
I have no doubt the military employ them in some cases, but what distances are they interested in covering, and are they even employing the benefits of NVIS?
A whip and wide band tuner, is a compromise antenna system however you use it.
I have read all the reviews on E-Ham and the like on this item, people saying its the best thing they ever bought, used with a whip or random bit of wire etc. etc., what they never do is tell you what they replaced with it, for all anyone knows it could have been a screwdriver shoved in the back of the antenna socket.
You get statements like "If I can hear it, I can work it"....what they never tell you is exactly "what" they are hearing and from where!
It means nothing, as everyone's experience of it, and satisfaction with it, is purely personal.
If they were so good, the whole amateur World would be using them, and we could all just throw everything else away, including the towers! ;)
It will work, no doubt about it, it will work very well for what it does, but it is a compromise full stop.
And an expensive one come to that.

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Wed Jul 22, 2020 10:35 am
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 EFHW or Icom AH4 
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Post Re: EFHW or Icom AH4
most antennas are a compromise.

the guy didn't actually state whether he WANTED an NVIS antenna or not, simply asked if it would be, cue Dave and his encyclopedic knowledge base.

the 7' whip wasn't mentioned in the original post either, it certainly wouldn't be what I'd combine with the AH-4.
the longest length of wire you can get away with, fed by the AH-4, against as many radials as you can get.

inverted L style would be best.

perhaps if the OP said what he wanted to achieve, we could help more.

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Wed Jul 22, 2020 6:47 pm
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Post Re: EFHW or Icom AH4
The Icom AH4 can be used Mobile with a 2.4 meter (8.2 foot) Whip
The blurb states this cover 40-6m.
Will this Short vertical antenna be classed as an NVIS.
In a static location using at least 7meters of wire gives the user 80-6m.
I am thinking an End Fed Half Wave antenna can give just about the same coverage
maybe not on 6meters.
As one person said there is more options using the AH4.
Then again the GC-3000 is another option I noticed today.
Thank you for your replies keep them coming
73
Keith.

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M0KLL Last CoG RAE Exam December 2003
Royal Corps of Signals Celebrating its Centenary 1920-2020 CERTA CITO... .


Wed Jul 22, 2020 8:50 pm
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Post Re: EFHW or Icom AH4
I use a CG3000 and abt 20m of wire very low in a L shape, and get good results.73


Wed Aug 12, 2020 9:32 pm
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