here is the link, Save you the google search:

http://jcoppens.com/ant/qfh/calc.en.php

Rick Tejera (K7TEJ) Saguaro Astronomy Club www.saguaroastro.org Thunderbird Radio Club www.w7tbc.org 623-572-0713 623-203-4121 (cell) SaguaroAstro@cox.net

-----Original Message----- From: Ed Krome [mailto:e.krome@comcast.net] Sent: Wednesday, March 02, 2016 8:11 AM To: Richard Tejera Cc: Eric Christensen; Andrew Glasbrenner; AMSAT Subject: Re: [amsat-bb] I wonder if this commercial quadrifilar helicoidal antenna any good?

Google jcoppens.com I just built one cut to 140MHz. Works OK (with rather broad 2M preamp) on both weather sats and cubesats. Doesn't have great input return loss; tweaking wouldn't hurt but I'm not going to mess with it. Get it as high and clear as you can.

Ed K9EK

Sent from my iPhone

On Mar 2, 2016, at 12:13 AM, Richard Tejera Saguaroastro@cox.net wrote:

I made one for 137mHz to decode the NOAA WX says. Easier than it looks.

Cost was about $25. I found an online applet that calculates the dimensions and prints a drilling template

If your intersted,let me know and I'll dig up the url. (Bookmarked on

another computer)

Rick Tejera K7TEJ Saguaro Astronomy Club www.SaguaroAstro.org Thunderbird Amateur Radio Club www.w7tbc.org

On March 1, 2016, at 08:56, Eric Christensen eric@christensenplace.us

wrote:

On 03/01/2016 10:11 AM, Andrew Glasbrenner wrote:

...

I have the UHF model. It lives on a magnet base stuck to the side of the

AC air handler in my garage, and I hang my yard work hat on it. It was worse than a 2m 1/4 wave whip on receive on AO-51.

Thanks, Drew (and everyone else that responded). I just need to figure out how to get those M2 yagis up in the air, really.

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