Yeah, I found the review on the ARRL web site by searching for "QHTenna".
Looking at the pictures, it appears that the dipoles are separated by about 1/4 wave in free space, which is physically longer than a 1/4 wave phasing line would be. And I'd think that the phasing line would have to be 1/2 wavelength, after introducing a 1/4 wave offset between the dipoles, correct?
In answer to Joel's original question, there is a link at www.qhtenna.com for questions or support for owners of existing QHTennas.
They should be pretty easy to duplicate, at any rate.
George, KA3HSW
----- Original Message ----- From: "Jim Jerzycke" [email protected] To: "amsat bb" [email protected]; "George Henry" [email protected] Sent: Saturday, July 04, 2009 1:54 PM Subject: Re: [amsat-bb] Re: Antenna Question
The product review is in the August 2004 QST. If you have access to the reviews page you can find it under the "Q" listings by manufacturer. Jim KQ6EA
--- On Sat, 7/4/09, George Henry [email protected] wrote:
From: George Henry [email protected] Subject: [amsat-bb] Re: Antenna Question To: "amsat bb" [email protected] Date: Saturday, July 4, 2009, 8:51 AM
Sounds like the "QHTennas", made by N4QH. Reviewed in QST in 2005, then he stopped producing them just a few months later. Near as I could figure out, they are a conventional turnstile design, but with the 2 dipoles separated by the length of the phasing line, and no reflector.
George, KA3HSW