Towertalk
[Top] [All Lists]

## RE: [TowerTalk] Ground radials/elevated radials

 To: "'Yo3ctk'" ,"'Tom Rauch'" , RE: [TowerTalk] Ground radials/elevated radials "Paul Playford" Sat, 23 Oct 2004 02:15:42 -0000
 ```I use 4 elevated radials under each element on my 4 squares for 40m and 80m with Comtek box and am very happy with the performance of both systems. W1XT (a near neighbor) prefered 8 elevated radials under his parasitic fed arrays. We rated the systems as equal. If he could hear/work the DX, so could I, and vice versa. Both of us erected two radials as a dipole and trimmed them for resonance at our desired operating frequency. Due to the proximity to ground (9' feet) they come out a little short (physically). Then we installed the rest of the radials at the same length. After all the radials were installed we installed the vertical elements and trimmed them to the desired operating frequency, which due to the slightly short radials made the vertical portion slightly long. This raised the feed point impedance slightly and tilted the radiation lobe down a bit. Not enough to measure but by theory. I don't consider forward gain as my array's strong point but they both have excellent front to back and front to side. They do have some forward gain though because I have busted a lot of pileups with them. de Paul, W8AEF -----Original Message----- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com] On Behalf Of Yo3ctk Sent: Friday, October 22, 2004 11:50 AM To: Tom Rauch; towertalk@contesting.com Subject: Re: [TowerTalk] Ground radials/elevated radials The same would hold true for elevated radials? I am designing a 4-square for 80m. Full size verticals. Comteq phasing/switching unit. But I need elevated radials for practical reasons (the land below is used for small-size agriculture). I am not sure how many and how long radials are needed for each antenna. I am not after the ultimate system, only one with decent results. Thank you for any suggestion. Best regards, 73 de Mike, YO3CTK (YR7M in contests) ----- Original Message ----- From: "Tom Rauch" > No. Radials needs to be as many as long and as straight and evenly > spaced as possible. If they are close to ground or on ground, you need > 20-30 0.2 wavelength long to have a really good ground. About 50 or 60 > radials is nearly perfect. _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.778 / Virus Database: 525 - Release Date: 10/15/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.778 / Virus Database: 525 - Release Date: 10/15/2004 _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
 Current Thread [TowerTalk] Ground radials- the long and short of it, Scott Fike Re: [TowerTalk] Ground radials- the long and short of it, Tom Rauch Re: [TowerTalk] Ground radials/elevated radials, Yo3ctk Re: [TowerTalk] Ground radials/elevated radials, Tom Rauch RE : [TowerTalk] Ground radials/elevated radials, hermans RE: [TowerTalk] Ground radials/elevated radials, Paul Playford Re: [TowerTalk] Ground radials/elevated radials, Jim Lux RE: [TowerTalk] Ground radials/elevated radials, Paul Playford <= Re: [TowerTalk] Ground radials- the long and short of it, Ted KT1V Re: [TowerTalk] Ground radials- the long and short of it, Jim Bowman RE: [TowerTalk] Ground radials- the long and short of it, David Robbins K1TTT Re: [TowerTalk] Ground radials- the long and short of it, Tom Rauch Re: [TowerTalk] Ground radials- the long and short of it, David Hachadorian Re: [TowerTalk] Ground radials- the long and short of it, Jim Lux