Hi all,
I have a coupling problem in my station when trying to work FO-29. My 2m signal is completely blocking the 435 MHz downlink, and so I can't hear my signal off the satellite. I guess it must be something related to the distance between the two yagis. (I use the terrestrial horizontal yagis you can see at http://www.dxmaps.com/jm19hn.html ). With mode-B satellites there is no problem. I have tried it with two different 435 receivers, and it's exactly the same.
Anyone has had this problem o have an idea of the possible reason? And what is more important, of some way to solve it?
Thanks for any possible help.
73. Gabriel - EA6VQ _________________________________________________________ Web-Site: HTTP://www.dxmaps.com VQLog 3.1 (build 78): HTTP://www.vqlog.com _________________________________________________________
Buy a diplexer, and connect it as shown in the linked article:
http://www.amsat.org/amsat-new/articles/Mode-J/
I also tilt both of my Yagis so they're 45* to the boom, which makes them 90* to each other.
Yes, I lose some signal on terrestrial use, but ti helped cut the coupling, and desense, down quite a bit.
73, Jim KQ6EA
On 01/19/2014 06:56 PM, Gabriel - EA6VQ wrote:
Hi all,
I have a coupling problem in my station when trying to work FO-29. My 2m signal is completely blocking the 435 MHz downlink, and so I can't hear my signal off the satellite. I guess it must be something related to the distance between the two yagis. (I use the terrestrial horizontal yagis you can see at http://www.dxmaps.com/jm19hn.html ). With mode-B satellites there is no problem. I have tried it with two different 435 receivers, and it's exactly the same.
Anyone has had this problem o have an idea of the possible reason? And what is more important, of some way to solve it?
Thanks for any possible help.
- Gabriel - EA6VQ
Web-Site: HTTP://www.dxmaps.com VQLog 3.1 (build 78): HTTP://www.vqlog.com _________________________________________________________
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
Hello Jim,
Do you still use the GulfAlpha 'Easy Sat' antenna? I'm looking for any advice on improving performance. I have already installed the diplexer as shown in the article below but it seems I'm getting no good signal on the 70cm uplink.
Paul Delaney - K6HR http://k6hr.dyndns.org:8080
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Jim Jerzycke Sent: Sunday, January 19, 2014 11:09 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Buy a diplexer, and connect it as shown in the linked article:
http://www.amsat.org/amsat-new/articles/Mode-J/
I also tilt both of my Yagis so they're 45* to the boom, which makes them 90* to each other.
Yes, I lose some signal on terrestrial use, but ti helped cut the coupling, and desense, down quite a bit.
73, Jim KQ6EA
On 01/19/2014 06:56 PM, Gabriel - EA6VQ wrote:
Hi all,
I have a coupling problem in my station when trying to work FO-29. My 2m signal is completely blocking the 435 MHz downlink, and so I can't hear my signal off the satellite. I guess it must be something related to the distance between the two yagis. (I use the terrestrial horizontal yagis
you
can see at http://www.dxmaps.com/jm19hn.html ). With mode-B satellites
there
is no problem. I have tried it with two different 435 receivers, and it's exactly the same.
Anyone has had this problem o have an idea of the possible reason? And
what
is more important, of some way to solve it?
Thanks for any possible help.
- Gabriel - EA6VQ
Web-Site: HTTP://www.dxmaps.com VQLog 3.1 (build 78): HTTP://www.vqlog.com _________________________________________________________
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
_______________________________________________ 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
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Hi, Paul
I use that antenna as my "Field Day" antenna, as it's much easier to transport.
At home I use an M2 2M7 and a 420-450-11 with SSB preamps.
73, Jim KQ6EA
On 01/19/2014 11:21 PM, Paul wrote:
Hello Jim,
Do you still use the GulfAlpha 'Easy Sat' antenna? I'm looking for any advice on improving performance. I have already installed the diplexer as shown in the article below but it seems I'm getting no good signal on the 70cm uplink.
Paul Delaney - K6HR http://k6hr.dyndns.org:8080
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Jim Jerzycke Sent: Sunday, January 19, 2014 11:09 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink
Buy a diplexer, and connect it as shown in the linked article:
http://www.amsat.org/amsat-new/articles/Mode-J/
I also tilt both of my Yagis so they're 45* to the boom, which makes them 90* to each other.
Yes, I lose some signal on terrestrial use, but ti helped cut the coupling, and desense, down quite a bit.
73, Jim KQ6EA
On 01/19/2014 06:56 PM, Gabriel - EA6VQ wrote:
Hi all,
I have a coupling problem in my station when trying to work FO-29. My 2m signal is completely blocking the 435 MHz downlink, and so I can't hear my signal off the satellite. I guess it must be something related to the distance between the two yagis. (I use the terrestrial horizontal yagis
you
can see at http://www.dxmaps.com/jm19hn.html ). With mode-B satellites
there
is no problem. I have tried it with two different 435 receivers, and it's exactly the same.
Anyone has had this problem o have an idea of the possible reason? And
what
is more important, of some way to solve it?
Thanks for any possible help.
- Gabriel - EA6VQ
Web-Site: HTTP://www.dxmaps.com VQLog 3.1 (build 78): HTTP://www.vqlog.com _________________________________________________________
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
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
This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com
At 07:09 PM 1/19/2014 +0000, Jim Jerzycke kq6ea@verizon.net wrote:
Buy a diplexer, and connect it as shown in the linked article:
http://www.amsat.org/amsat-new/articles/Mode-J/
I also tilt both of my Yagis so they're 45* to the boom, which makes them 90* to each other.
Yes, I lose some signal on terrestrial use, but ti helped cut the coupling, and desense, down quite a bit.
73, Jim KQ6EA
One thing I've always wondered about this is, would one what to put a 50 ohm non inductive resister on the 2M output of the diplexer? or shouldn't that make much difference.
KB7ADL
Vince,
Just for fun I swept the mode-J filter with an analyzer. The isolation was good enough that it didn't matter with the 2 meter side was terminated or not.
73s,
Alan WA4SCA
<-----Original Message----- <From: amsat-bb-bounces@amsat.org <[mailto:amsat-bb-bounces@amsat.org] On Behalf Of Vince Fiscus, KB7ADL <Sent: Monday, January 20, 2014 4:06 PM <To: amsat-bb@amsat.org <Subject: [amsat-bb] Re: 145 MHz signal blocking 435 MHz downlink < <At 07:09 PM 1/19/2014 +0000, Jim Jerzycke kq6ea@verizon.net wrote: <>Buy a diplexer, and connect it as shown in the linked article: <> <> <>http://www.amsat.org/amsat-new/articles/Mode-J/ <> <>I also tilt both of my Yagis so they're 45* to the boom, <which makes them <>90* to each other. <> <>Yes, I lose some signal on terrestrial use, but ti helped cut the <>coupling, and desense, down quite a bit. <> <>73, Jim KQ6EA < < <One thing I've always wondered about this is, would one what to <put a 50 ohm non inductive resister on the 2M output of the <diplexer? or shouldn't that make much difference. < <KB7ADL < < < <_______________________________________________ <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 <
The original article said it didn't matter, but I put a 50 Ohm load on mine just on "General Principles".
I HATE seeing a port like that unterminated!
73, Jim KQ6EA
On 01/20/2014 10:06 PM, Vince Fiscus, KB7ADL wrote:
At 07:09 PM 1/19/2014 +0000, Jim Jerzycke kq6ea@verizon.net wrote:
Buy a diplexer, and connect it as shown in the linked article:
http://www.amsat.org/amsat-new/articles/Mode-J/
I also tilt both of my Yagis so they're 45* to the boom, which makes them 90* to each other.
Yes, I lose some signal on terrestrial use, but ti helped cut the coupling, and desense, down quite a bit.
73, Jim KQ6EA
One thing I've always wondered about this is, would one what to put a 50 ohm non inductive resister on the 2M output of the diplexer? or shouldn't that make much difference.
KB7ADL
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
participants (5)
-
Alan -
Gabriel - EA6VQ -
Jim Jerzycke -
Paul -
Vince Fiscus, KB7ADL