[amsat-bb] Helical Antenna for 2-meters

Rick Tejera SaguaroAstro at cox.net
Sun Feb 5 21:31:59 UTC 2017

Please share the link. Sounds interesting


Sent from Mail for Windows 10

From: Dave Mann
Sent: Sunday, February 5, 2017 12:49
To: amsat-bb at amsat.org
Subject: Re: [amsat-bb] Helical Antenna for 2-meters

Thanks to all!  I researched more and found a design on a VK's website.  I'll be digging into that real soon now.


Sent from my iPad

> On Feb 5, 2017, at 09:06, Dave Mann <cwo4mann at comcast.net> wrote:
> I just did some calculations from the ARRL Antenna Handbook.  I came up with a 6-turn helical with a diameter of 25.826" and a length of 121.65".   My first thought was "whoa, dude, like OMG!" (I'm a high school teacher, ok?)   I rechecked my calculations and came up with same, plus an impedance of 150 ohms.
> Years ago I used a Fritzel Helical for 2m when I was DA1BB and VP2EHF (during Hurricane Luis in 1994 it ended up someplace out in the Anagada Straights between Anguilla and Sombrero Island).
> What say, you all?   Advice, comments welcomed
> 73
> Dave, N4CVX
> Sent from my iPad

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