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G4NRT
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Joined: Mon Oct 06, 2014 8:13 am Posts: 697 Location: Rochester, Kent. JO01fj
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ProWhip Delta Loops
I'm thinking of getting one of these antennas (either the 6m or 8m length version). Does anyone have any comments on construction quality and especially performance? They seem very keenly priced! The site is here: https://www.prowhipantennas.co.uk/index ... egory_id=7Thanks in advance, David G4NRT
_________________ Rochester, Kent / JO01fj http://www.g4nrt.com MAY THE MORSE BY WITH YOU
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Wed Mar 25, 2015 10:35 am |
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2E1GSN
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Re: ProWhip Delta Loops
Hello I have one that i use /p its kept in the boot of the car as it packs down to a small size.The performance is fine from 20/10m it works very well indeed with a low noise floor.The build quality is ok with flexible whips and bread board type base plus a unun.Mine is the small 3m delta loop and for the price i am very pleased with the antenna. Many thanks steve
_________________ The perfect blossom is a rare thing. You could spend your entire life looking for one, and it would not be a wasted life.
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Wed Mar 25, 2015 12:01 pm |
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G4NRT
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Re: ProWhip Delta Loops
Thank you!
David G4NRT
_________________ Rochester, Kent / JO01fj http://www.g4nrt.com MAY THE MORSE BY WITH YOU
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Wed Mar 25, 2015 12:37 pm |
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M0YDC
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Joined: Thu Jan 09, 2014 10:31 am Posts: 2360 Location: West Sussex
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Re: ProWhip Delta Loops
breaker wrote: Hello I have one that i use /p its kept in the boot of the car as it packs down to a small size.The performance is fine from 20/10m it works very well indeed with a low noise floor.The build quality is ok with flexible whips and bread board type base plus a unun.Mine is the small 3m delta loop and for the price i am very pleased with the antenna. Many thanks steve Just see this thread so thanks to the OP for starting it. Steve, how do you find it performs on 15 meters and at what sort of height have used it at? I am considering the 3 meter version also. Thanks Den
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Tue Mar 31, 2015 8:21 pm |
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2E1GSN
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Joined: Sun Dec 06, 2009 11:14 am Posts: 2354 Location: DERBYSHIRE
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Re: ProWhip Delta Loops
310den wrote: breaker wrote: Hello I have one that i use /p its kept in the boot of the car as it packs down to a small size.The performance is fine from 20/10m it works very well indeed with a low noise floor.The build quality is ok with flexible whips and bread board type base plus a unun.Mine is the small 3m delta loop and for the price i am very pleased with the antenna. Many thanks steve Just see this thread so thanks to the OP for starting it. Steve, how do you find it performs on 15 meters and at what sort of height have used it at? I am considering the 3 meter version also. Thanks Den Hello To be fair i have not used this Delta loop from home (200asl) however i do use it /p from elevated sites that i come across on my travels.The performance on 15m has always amazed me and at 600ft above sea level on a 20ft portable mast last week i worked qrp with 5w into the Caribbean.We then decided to QSY to 12m and repeated the contact at that point several north America and a M/M from the west coast pacific called in to give me reports from my QRP/P Kind regards steve
_________________ The perfect blossom is a rare thing. You could spend your entire life looking for one, and it would not be a wasted life.
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Tue Mar 31, 2015 9:07 pm |
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M0YDC
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Re: ProWhip Delta Loops
OK thanks Steve, gives me a good idea what they are like, limited for space here so may be a good solution or addition to my doublet.
Cheers.
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Tue Mar 31, 2015 9:23 pm |
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G7VQE
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Joined: Wed Jan 27, 2010 8:56 pm Posts: 2847 Location: IO92mg Northampton... Boz Wellox!
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Re: ProWhip Delta Loops
Why does he have an UNUN with the antenna kit or is that assuming the antenna is fed with coax? I bodged one up with the fishing poles from my Moxon antenna and have simply fed the antenna directly with some 300 ohm line, not sure what the losses might be but was under the impression that the line and loop are both balanced so shouldn't need any additional components? Sneaky way of soliciting advice. Cheers, Dave.
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Tue Mar 31, 2015 9:45 pm |
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M0YDC
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Re: ProWhip Delta Loops
G7VQE wrote: Why does he have an UNUN with the antenna kit or is that assuming the antenna is fed with coax? I bodged one up with the fishing poles from my Moxon antenna and have simply fed the antenna directly with some 300 ohm line, not sure what the losses might be but was under the impression that the line and loop are both balanced so shouldn't need any additional components? Sneaky way of soliciting advice. Cheers, Dave. Yes Dave you do feed them directly with coax hence the UNUN. I considered making one either with an UNUN (but don't know what exact UNUN is needed) or with 300 ohm like you but not sure how much cheaper I can make one as I need 2 poles the same as you get in the kit so with buying them and the wire I am not sure what the price difference will be. If there is only a few quid in it I may as well buy the one already made.
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Wed Apr 01, 2015 6:49 am |
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m0jha
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Joined: Sat Jul 21, 2007 9:37 am Posts: 10570 Location: Manchester IO83TK
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Re: ProWhip Delta Loops
The loop should have a BALUN if it's being fed with coax . The loop should be balanced .
_________________ Voice is for CBers, amateur radio operators, the average citizen, and the military. In other words, voice is for everyone with a mouth. CW is for those who choose this newer mode of communication. Newer? Why yes. Voice has been around for a million years.
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Wed Apr 01, 2015 6:01 pm |
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M0YDC
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Re: ProWhip Delta Loops
m0jha wrote: The loop should have a BALUN if it's being fed with coax . The loop should be balanced . I thought a balun but they quote it as an 'unun'. I may make one and use 300 ohm balanced line down to a 4:1 balun, same way as my doublet, it's got to work, how effective.... hmm, time will tell.
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Thu Apr 02, 2015 9:35 am |
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m0jha
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Joined: Sat Jul 21, 2007 9:37 am Posts: 10570 Location: Manchester IO83TK
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Re: ProWhip Delta Loops
I think they just use ununs for everything as they can just stick a "stock" one on whatever they make , the end fed verts or loops although I could be wrong ...
You could simply use a 1.1 current balun or choke balun and feed with a quarter wave 75 ohm coax stub then coax to shack save having a "conventional" transformer . Not sure on the maths to work out the electrical length required for the 75 ohm section now ...
_________________ Voice is for CBers, amateur radio operators, the average citizen, and the military. In other words, voice is for everyone with a mouth. CW is for those who choose this newer mode of communication. Newer? Why yes. Voice has been around for a million years.
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Thu Apr 02, 2015 4:18 pm |
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G3TXQ
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Joined: Fri May 22, 2009 1:23 pm Posts: 5637 Location: Northampton IO92ME
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Re: ProWhip Delta Loops
I presume it's intended to be used multiband, so a 1/4 wave matching section wouldn't work.
The 1:1 balun is a better idea than the Unun provided the length of coax is short.
Losses are very high if you try to use it on 80m or 40m.
Steve G3TXQ
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Thu Apr 02, 2015 5:27 pm |
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m0jha
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Joined: Sat Jul 21, 2007 9:37 am Posts: 10570 Location: Manchester IO83TK
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Re: ProWhip Delta Loops
sorry I was going off a monobander ..
_________________ Voice is for CBers, amateur radio operators, the average citizen, and the military. In other words, voice is for everyone with a mouth. CW is for those who choose this newer mode of communication. Newer? Why yes. Voice has been around for a million years.
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Thu Apr 02, 2015 6:13 pm |
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M0YDC
Advanced Member
Joined: Thu Jan 09, 2014 10:31 am Posts: 2360 Location: West Sussex
Feedback: 48 (100%)
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Re: ProWhip Delta Loops
breaker wrote: 310den wrote: breaker wrote: Hello I have one that i use /p its kept in the boot of the car as it packs down to a small size.The performance is fine from 20/10m it works very well indeed with a low noise floor.The build quality is ok with flexible whips and bread board type base plus a unun.Mine is the small 3m delta loop and for the price i am very pleased with the antenna. Many thanks steve Just see this thread so thanks to the OP for starting it. Steve, how do you find it performs on 15 meters and at what sort of height have used it at? I am considering the 3 meter version also. Thanks Den Hello To be fair i have not used this Delta loop from home (200asl) however i do use it /p from elevated sites that i come across on my travels.The performance on 15m has always amazed me and at 600ft above sea level on a 20ft portable mast last week i worked qrp with 5w into the Caribbean.We then decided to QSY to 12m and repeated the contact at that point several north America and a M/M from the west coast pacific called in to give me reports from my QRP/P Kind regards steve Hi Steve Is it possible at some point when you next use this antenna you could post a photo up of the board where the bottom of the poles are so I can see the angles and how they are mounted and could you also measure the gap or the wire between the tips of the poles when they are extended so I can get an idea of how much wire is used? No rush at all, would appreciate the info if you can. Thanks
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Sat Apr 04, 2015 1:14 pm |
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G7CBR
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Re: ProWhip Delta Loops
The wires should be equal lengths on all 3 legs and measure a half wavelength at the frequency of use. So the 8 metre version should have 24 metres of wire +/- for 40 metres. The angle at the bottom of the V should be as close to 90 degrees as possible. Dont do what I did and mount it in the clear as 25 foot and then ignore the weather, the poles will snap. Luckily I have a selection of glass fibre whips that I broke on fish and could splint the broken ends. The wire will also flex at the point it enters the pole and eventually break. Birds will see it as a good place to roost and become tangled in the wire, being right on the coast this usually means seagulls. All in all a good antenna if you only have a small garden, nosy neighbours and have worked into Canada and US on 10 watts on HF. Will also tune up on 6 metres and have had some good contacts into Europe. Very directional and could do with a rotator, but will work close to ground so makes it easy to turn using the Armstrong method
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Sun Apr 05, 2015 4:15 pm |
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