dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

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WARLOCK
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dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by WARLOCK » 18 Sep 2017, 09:46

Going to have a go to build a wire dipole for use on 27.555 usb. Now what is best 1/2 wave=17 ft each side or 1/4 wave = 8 1/2 ft each side ???

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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by g7kxm » 18 Sep 2017, 11:02

A dipole is overall length a 1/2 wave so you would go for each side being a 1/4 wave.

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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by Tigersaw » 18 Sep 2017, 11:10

The full wave dipole would be very high impedance if fed from the centre, it could be done if you feed with balanced line, or use a matching transformer, but best stick with the 1/4 wave either side if fed with co-ax for a single band antenna, look to get it at least 5 metres above the ground.

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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by Admiral » 18 Sep 2017, 12:08

They'll both be crap compared to your Imax 2000 at a similar height.
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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by ch25 » 18 Sep 2017, 12:51

Circa 1dBd over a dipole is nothing compared to man made noise cancelling of horizontal antenna.
Imax is crap antenna anyway.
Some good reading about Imax2000: https://www.w8ji.com/end-fed_vertical.htm#IMAX
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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by WARLOCK » 18 Sep 2017, 13:21

Thanks Admiral think i will stick to my IMAX 2000 and save myself a lot of work ,I wondered if by using a dipole i could cut some of the heavy background noise as i get a lot of living in the middle of town surrounded by very tall buildings all round, never mind.

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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by Admiral » 18 Sep 2017, 13:38

Only one way to find out, give it a go.
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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by WARLOCK » 27 Sep 2017, 13:04

Well mr ch25 you seem to slag every ones radio and antenna off ,NOW you being such a expert please will you tell us lesser mortals what radio and antenna we should be using ??? as for the I MAX 2000 if it is such a crap antenna why do so many people get on so well using it ??? as i said what radio and antenna would you have us all using so we can be as good a radio op as you .

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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by superstar » 27 Sep 2017, 15:25

I loved my imax up on the chimney, worked really well, soot from having the woodburner lit blocked the drain hole and it filled up
With water along with the coax, I only noticed when I saw water dripping off my rig in the lounge
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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by NightProwler » 27 Sep 2017, 16:13

WARLOCK wrote:Well mr ch25 you seem to slag every ones radio and antenna off ,NOW you being such a expert please will you tell us lesser mortals what radio and antenna we should be using ??? as for the I MAX 2000 if it is such a crap antenna why do so many people get on so well using it ??? as i said what radio and antenna would you have us all using so we can be as good a radio op as you .
Yes he does like to slag off everything and think he is superior to everyone else, Just another troll. Stick with the Imax, Excellent antennas :thumbup:
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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by MrWeetabix » 27 Sep 2017, 16:14

I do just fine on my crap iMax thanks, works well for me and suits my QTH.

CH25, you're entitled to an opinion, but you always seem so negative and closed minded. Everyone's own Radio situation is different and different things will work for them, it's all trial and error. In all honesty, you can come across as a bit of an asshole at times, perhaps you need to work on that if you're going to continue to contribute to this forum. It's not WHAT you say, it's more HOW you say it.
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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by NightProwler » 27 Sep 2017, 16:19

Come on Craig press that magic button and remove the asshole or decent folk with manners on here will be leaving.
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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by ch25 » 27 Sep 2017, 16:50

NightProwler wrote:Yes he does like to slag off everything and think he is superior to everyone else, Just another troll. Stick with the Imax, Excellent antennas :thumbup:
Nah, just some radio fan with some experience.
I won't convince you, but I had Imax, A99, Shakespeare big stick along with nice aluminium antenna on the switch for a long time.
Difference is easy to notice. Try yourself.
You can't have too many antennas...

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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by Buick Mackane » 27 Sep 2017, 16:52

NightProwler wrote:Come on Craig press that magic button and remove the asshole or decent folk with manners on here will be leaving.
:thumbup:
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Re: dipole for 27.555 whats best ??? 1/2 wave or 1/4 wave

Post by Buick Mackane » 27 Sep 2017, 17:03

You can tell when a member isn't popular when the admin calls them an asshole :lol:
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