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 Which Portable Vertical For HF? 
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Post Which Portable Vertical For HF?
I am looking for a vertical fishing pole type antenna for portable working. Needs to work on 40m and 20m at the very least least. By portable I mean on a school playing field. So should still have access to mains power for the radio and an ATU. The only restriction being that there will be nothing around for fixing an antenna to.

I have been looking at:

1. M0CVO Magitenna
2. 6m Pro Whip

Price wise I think the obvious choice would be the Pro Whip as it comes with everything needed and is cheaper.

However, which one performs better?

Thanks

Paul


Sun May 18, 2014 8:06 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
Paul,

I doubt you'd notice much difference between the two. Possible the longer one might have a slight advantage at the lower frequencies.

Steve G3TXQ


Mon May 19, 2014 11:59 am
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
Paul, cant we get a 30ft fishing pole wrap a load of wire around it. Connect said wire to 9:1 unun, connect a few radials and away we go? or substitute radials for metal fencing?

Surely making is going to be cheaper than buying?


Mon May 19, 2014 1:58 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
At around 32 ' for a wire element your 10m pole will be 1/4WL at 40m, minus around 1% vf for PVC coated wire and you wouldn't need an inductor, then ditch the unun and make it into a linked vertical where you are resonant on each band you want, no matching loss.

I know I repeat this almost every time someone mentions vertical, but if your antenna is meant to be portable it has to be the best way to go.

I've just ordered up a few fibreglass poles to make a couple vertical two element yagis, the 10m pole costs £26 with free postage, I'm sure shopping around you could find them cheaper, a 6m pole was £14 with free postage.

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Mon May 19, 2014 3:10 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
G7DIE wrote:
I've just ordered up a few fibreglass poles to make a couple vertical two element yagis, the 10m pole costs £26 with free postage, I'm sure shopping around you could find them cheaper, a 6m pole was £14 with free postage.


May I ask where you buy your poles from please?


Mon May 19, 2014 3:35 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
http://www.ebay.co.uk/itm/140697841724? ... 1423.l2648


Mon May 19, 2014 4:58 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
Thank you.


Mon May 19, 2014 5:33 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
Yes, making would be a cheaper option and I have an M0CVO 9:1 UNUN with 10m of wire. Had a quick play and wasn't too impressed with the performance on receive. That said I haven't tried it with an ATU or any counterpoise elements yet and it wasn't vertical. So, not really a good test LOL.

Sorry to be a bit dim but.... What is a linked vertical and how does it work?

Thanks for the heads up on the fibreglass poles.


Mon May 19, 2014 10:05 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
M0HNF wrote:
Yes, making would be a cheaper option and I have an M0CVO 9:1 UNUN with 10m of wire. Had a quick play and wasn't too impressed with the performance on receive. That said I haven't tried it with an ATU or any counterpoise elements yet and it wasn't vertical. So, not really a good test LOL.

Sorry to be a bit dim but.... What is a linked vertical and how does it work?

Thanks for the heads up on the fibreglass poles.




If that didn't work as you would like, it's not likely the others would please you either.

I will be doing similar next half term, and I will be using a G7FEK made out of lightweight kevlar cored wire, supported by one pole and a tree/building.

Although I use a multiband vertical at home, it is not the best performer if there is space for anything else.

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Tue May 20, 2014 4:21 am
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
I would be tempted with steves (G7DIE) idea .

The only thing I would personally do is have a small tapped inductor at the base and have each linked element ever so slightly shorter ,this way it can be tapped for lowest swr . Linked dipoles are great BUT I have found differing set up conditions CAN produce varying swr readings albeit still within a radios working parameter but i'm an swr watcher ..

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Tue May 20, 2014 8:34 am
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
M0HNF wrote:

Sorry to be a bit dim but.... What is a linked vertical and how does it work?

Thanks for the heads up on the fibreglass poles.


Say you have a 33ft pole . Starting at the bottom you would run an 8 footish wire up the pole ,that's your 1/4 wave 10m vert section .

If your next band you wanted was 12m the length needed for that would be around 9 foot . You already have 8 for the 10m section so you would add another bit of wire roughly a foot long connected together with male/female electrical connectors for example .the next band is done the same ..

if using 10m the two sections of wire are not connected then if you decide to use 12m you would link the two sections

as you make the lower bands you simply take ALL the other elements you have already made into consideration when calculating your new sections length ..

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Tue May 20, 2014 8:47 am
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
Mind you with a 33ft support pole you could run an half wave length at those higher frequencies and if you're not actually blessed with a salt water horizon in the desired direction but humble dirt might notice a slight increase in performance from the extra height ... I do from my back garden mounted pole anyway, it might also be blind optimism though. :blackeye:

Cheers, Dave.


Tue May 20, 2014 7:40 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
Another simple gain antenna would be a coax vertical dipole for 20m, no need for radials either, choked at the bottom and run your coax out to the tcvr, boom!

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Tue May 20, 2014 7:51 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
I am now going to buy a 10m fishing pole and make a HF vertical using the suggestions above to see which works best.

Thank you

Paul


Thu May 22, 2014 8:48 pm
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 Which Portable Vertical For HF? 
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Post Re: Which Portable Vertical For HF?
The fishing pole has arrived and I have simply attached 10m of wire to it and worked M0XLT on 40m and it worked :good:


Sun Jun 01, 2014 9:29 pm
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