I am looking for ideas on fastening the feed lines for CP antennas. I have a 22 element M2 for 144 and a 435CP30 M2. Running the feed lines out the back seems to create problems. Are people supporting the cables or letting them hang. Any ideas will be help full. Thanks Mike
I always ran my feedline along the boom of the antenna to the crossboom. Then along the crossboom back to the AZ/EL rotator with a loop around the rotator.
There are a couple pictures near the bottom of the page here: http://www.kk0sd.net/sattower/sattower02.htm
I used a metal crossboom based on information from antenna guru Keith Britain, wa5vjb. You can see that information here: http://www.kk0sd.net/metalboom/metalboom.htm
It worked very well.
73, Joe kk0sd
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of WB8PFZ via AMSAT-BB Sent: Sunday, September 20, 2020 2:11 PM To: amsat-bb@amsat.org Subject: [amsat-bb] feeding CP antennas
I am looking for ideas on fastening the feed lines for CP antennas. I have a 22 element M2 for 144 and a 435CP30 M2. Running the feed lines out the back seems to create problems. Are people supporting the cables or letting them hang. Any ideas will be help full. Thanks Mike _______________________________________________ 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: https://www.amsat.org/mailman/listinfo/amsat-bb
On 09/20/2020 12:50, Gary via AMSAT-BB wrote:
I always ran my feedline along the boom of the antenna to the crossboom. Then along the crossboom back to the AZ/EL rotator with a loop around the rotator.
Same here.
I thought the manual for the M2 antenna specifically warned about this. That the feed line should droop off the back? Last time I monkeyed up with antennas, I even made this change. Not sure if this made a difference, though, as I had another issue that turned out to be my real problem.
On 9/20/2020 5:07 PM, Jim Walls via AMSAT-BB wrote:
On 09/20/2020 12:50, Gary via AMSAT-BB wrote:
I always ran my feedline along the boom of the antenna to the crossboom. Then along the crossboom back to the AZ/EL rotator with a loop around the rotator.
Same here.
That's how I do mine....droop off the back.
Bob W7OTJ
On Sat, Sep 26, 2020 at 3:20 PM Cathryn Mataga via AMSAT-BB < amsat-bb@amsat.org> wrote:
I thought the manual for the M2 antenna specifically warned about this. That the feed line should droop off the back? Last time I monkeyed up with antennas, I even made this change. Not sure if this made a difference, though, as I had another issue that turned out to be my real problem.
On 9/20/2020 5:07 PM, Jim Walls via AMSAT-BB wrote:
On 09/20/2020 12:50, Gary via AMSAT-BB wrote:
I always ran my feedline along the boom of the antenna to the crossboom. Then along the crossboom back to the AZ/EL rotator with a loop around the rotator.
Same here.
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: https://www.amsat.org/mailman/listinfo/amsat-bb
Rather than explain how to do it correctly it was easier to say just don't do it. So they said don't do it.
If you want to read how to do it correctly I have published antenna guru Kent Britain (WA5VJB) paper on the subject with permission here: http://www.kk0sd.net/metalboom/metalboom.htm
If you would like to see pictures of how I followed his instructions you can seen the pictures near the bottom of the page here: http://www.kk0sd.net/sattower/sattower02.htm
73, Joe kk0sd
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of Cathryn Mataga via AMSAT-BB Sent: Saturday, September 26, 2020 4:23 PM To: amsat-bb@amsat.org Subject: Re: [amsat-bb] feeding CP antennas
I thought the manual for the M2 antenna specifically warned about this. That the feed line should droop off the back? Last time I monkeyed up with antennas, I even made this change. Not sure if this made a difference, though, as I had another issue that turned out to be my real problem.
On 9/20/2020 5:07 PM, Jim Walls via AMSAT-BB wrote:
On 09/20/2020 12:50, Gary via AMSAT-BB wrote:
I always ran my feedline along the boom of the antenna to the crossboom. Then along the crossboom back to the AZ/EL rotator with a loop around the rotator.
Same here.
_______________________________________________ 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: https://www.amsat.org/mailman/listinfo/amsat-bb
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