Re: [amsat-bb] Helical Antenna for 2-meters
Please share the link. Sounds interesting
73 Rick K7TEJ
Sent from Mail for Windows 10
From: Dave Mann Sent: Sunday, February 5, 2017 12:49 To: amsat-bb@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.
73 Dave N4CVX
Sent from my iPad
On Feb 5, 2017, at 09:06, Dave Mann cwo4mann@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
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
HOME BREWING A HELIX, VK5ZAI STYLE
This is the title of his article, unable to find website again.
HTH
Dave
Sent from my iPad
On Feb 5, 2017, at 15:31, Rick Tejera SaguaroAstro@cox.net wrote:
Please share the link. Sounds interesting
73 Rick K7TEJ
Sent from Mail for Windows 10
From: Dave Mann Sent: Sunday, February 5, 2017 12:49 To: amsat-bb@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.
73 Dave N4CVX
Sent from my iPad
On Feb 5, 2017, at 09:06, Dave Mann cwo4mann@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
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Hi!
Try this link:
http://www.electric-web.org/2m_helix_antenna.htm
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK
On Sun, Feb 5, 2017 at 10:30 PM, Dave Mann cwo4mann@comcast.net wrote:
HOME BREWING A HELIX, VK5ZAI STYLE
This is the title of his article, unable to find website again.
HTH
Dave
has anyone got plans for similar but for 435?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 2/5/2017 4:37 PM, Patrick STODDARD (WD9EWK/VA7EWK) wrote:
Hi!
Try this link:
http://www.electric-web.org/2m_helix_antenna.htm
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK
On Sun, Feb 5, 2017 at 10:30 PM, Dave Mann cwo4mann@comcast.net wrote:
HOME BREWING A HELIX, VK5ZAI STYLE
This is the title of his article, unable to find website again.
HTH
Dave
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
There was one in either the ARRL Satellite Handbook, or the VHF/UHF antenna handbook.
73, Jim KQ6EA
On 02/05/2017 10:43 PM, Joe wrote:
has anyone got plans for similar but for 435?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 2/5/2017 4:37 PM, Patrick STODDARD (WD9EWK/VA7EWK) wrote:
Hi!
Try this link:
http://www.electric-web.org/2m_helix_antenna.htm
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK
On Sun, Feb 5, 2017 at 10:30 PM, Dave Mann cwo4mann@comcast.net wrote:
HOME BREWING A HELIX, VK5ZAI STYLE
This is the title of his article, unable to find website again.
HTH
Dave
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Jim mentioned: > There was one in either the ARRL Satellite Handbook, or the VHF/UHF
antenna handbook.
Helix antenna articles have also been published in the AMSAT Journal over the past decade:
AMSAT Journal, May/June 2008 - "Helix Antenna Mathematics and Construction Techniques", John Henderson, N4NAB
AMSAT Journal, September/October 2008 - "A 52 Turn Helix Antenna for S-Band that Overperforms", Clare Fowler, VE3NPC (shows useful details on construction tips although the dimensions obviously differ for 2 meter band)
AMSAT Journal, May/June 2011 - "Confessions of a Helix Junkie", Mike Williams, K9QHO
If you don't have the printed copies they were in the AMSAT Journal Archive DVD which appears to be out of stock in the AMSAT Store at the moment.
-- 73 de JoAnne K9JKM k9jkm@amsat.org
participants (6)
-
Dave Mann -
Jim Jerzycke -
JoAnne K9JKM -
Joe -
Patrick STODDARD (WD9EWK/VA7EWK) -
Rick Tejera