I have both the RHCP and LHCP receiver versions, but with a house move, I have not had the opportunity to test them.

John WA4WDL

-------------------------------------------------- From: "Andrew Glasbrenner" glasbrenner@mindspring.com Sent: Wednesday, December 30, 2009 1:14 PM To: "Jeff Kelly" jkelly@bellatlantic.net Cc: "amsat-bb" amsat-bb@amsat.org Subject: [amsat-bb] Re: Compact Quadrifilar Helix antenna

Jeff Kelly wrote:

...

This antenna has been out for a while:

http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.htm...

any feedback on it?

Jeff KT2K _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

Works OK with a good preamp. I have one mounted on my Explorer with some magnets from Harbor Freight, and an ARR preamp. Lots of guys here in deed-restricted communes, err, communities use them because of their stealth qualities.

73, Drew KO4MA _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

On Wed, Dec 30, 2009 at 4:15 PM, Edward Cole kl7uw@acsalaska.net wrote:

At 09:14 AM 12/30/2009, Andrew Glasbrenner wrote:

...

Jeff Kelly wrote:

...

This antenna has been out for a while:

http://www.antennas.us/store/p/229-UC-4364-328-Amateur-Satellite-antenna.htm...

...

any feedback on it?

Jeff KT2K _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

Works OK with a good preamp. I have one mounted on my Explorer with some magnets from Harbor Freight, and an ARR preamp. Lots of guys here in deed-restricted communes, err, communities use them because of their stealth qualities.

73, Drew KO4MA

A practical alternative is to build the QFH from the recent QST article. I have just finished one of these, and it seems to work reasonably. As luck would have it, I just posted notes on the process on my blog at

http://ve9qrp.blogspot.com

This is the RHCP version provided in the article. I found the downlink from VO-52 to be rather more weak than, say a vertical or dipole. I attribute this to the difference in circular polarity. I, too, am interested in switched circularly polarized omnidirectional antennas. I think I might make a AA2TX lindenblad for the corresponding LHCP unit.

Does anyone have recommendations for RF switches suited for 2m work and N-connectors?

If you like building antennas, you might look at the Lindenblad which performs similarly.  I am finishing up my dual-band pair and may get them installed, today: http://www.kl7uw.com/LBant.htm

I will fill in more info on this page in a day or two (just a few photos, now)

73, Ed - KL7UW, WD2XSH/45

BP40IQ   500 KHz - 10-GHz   www.kl7uw.com 500-KHz/CW, 144-MHz EME, 1296-MHz EME DUBUS Magazine USA Rep dubususa@hotmail.com ======================================

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Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb