Jerry Martes wrote:
"Steve Reinhardt" wrote in message
...
I have read a circularly polarized Yagi is appropriate for ARISS
communications. Is there a vendor that offers a crossed design? Or, better
still, is there a construction article that I can refer to?

What are you using for this type of communication?

I'm trying to set up a contact for my son's school class.

73,
Steve
W1KF


Hi Steve

Have you contacted the AMSAT guys (www.amsat.org)? I assume you are
aware of the need for gain required for you particular station. I thought
a linearly polarized 3 or 4 element Yagi was adequate. So, I wonder if
the complexity of making a crossed Yagi CP is justified when that will have
only 3 dB improvement with that same boom length.

Jerry


Jerry,

All news to me, so far. The ARISS website suggested circular
polarization and up to 100W. AMSAT is saying 3 elements and an HT. Quite
a variation...

Thanks for the hints, and I'll try listening for a while after I build
something!

73,
Steve
W1KF

"Steve Reinhardt" wrote in message
...
Jerry Martes wrote:
"Steve Reinhardt" wrote in message
...
I have read a circularly polarized Yagi is appropriate for ARISS
communications. Is there a vendor that offers a crossed design? Or,
better still, is there a construction article that I can refer to?

What are you using for this type of communication?

I'm trying to set up a contact for my son's school class.

73,
Steve
W1KF


Hi Steve

Have you contacted the AMSAT guys (www.amsat.org)? I assume you are
aware of the need for gain required for you particular station. I
thought a linearly polarized 3 or 4 element Yagi was adequate. So, I
wonder if the complexity of making a crossed Yagi CP is justified when
that will have only 3 dB improvement with that same boom length.

Jerry
Jerry,

All news to me, so far. The ARISS website suggested circular polarization
and up to 100W. AMSAT is saying 3 elements and an HT. Quite a variation...

Thanks for the hints, and I'll try listening for a while after I build
something!

73,
Steve
W1KF

Hi Steve

AMSAT has special interest in schools. Have you read about that?

Jerry

FWIW, I worked ARISS with 50 watts and a simple ground plane. They were
about 400 miles away (ground distance) and said I had full quieting. It was
an almost random contact. A web site mentioned that they were active; I
turned on my little FM rig and there he was. No one else called and we
chatted for about two minutes.

Bill - W2WO

Hi Steve -

The guys here ran a successful contact a few months ago. They used
their cubesat satellite setup. Here's a link to an article about it.

http://www.eng.uci.edu/node/1220

If you send me an email, I can put you in touch with the head of the
project who would be happy to supply all the info.

73, ac6xg


Steve Reinhardt wrote:

Jerry Martes wrote:

"Steve Reinhardt" wrote in
message ...

I have read a circularly polarized Yagi is appropriate for ARISS
communications. Is there a vendor that offers a crossed design? Or,
better still, is there a construction article that I can refer to?

What are you using for this type of communication?

I'm trying to set up a contact for my son's school class.

73,
Steve
W1KF



Hi Steve

Have you contacted the AMSAT guys (www.amsat.org)? I assume you
are aware of the need for gain required for you particular station.
I thought a linearly polarized 3 or 4 element Yagi was adequate.
So, I wonder if the complexity of making a crossed Yagi CP is
justified when that will have only 3 dB improvement with that same
boom length.

Jerry

Jerry,

All news to me, so far. The ARISS website suggested circular
polarization and up to 100W. AMSAT is saying 3 elements and an HT. Quite
a variation...

Thanks for the hints, and I'll try listening for a while after I
build something!

73,
Steve
W1KF

All good info, folks, thanks.

I'll look into this as as soon as I get back from my trip.

73,
Steve
W1KF

Jim Kelley wrote:
Hi Steve -

The guys here ran a successful contact a few months ago. They used
their cubesat satellite setup. Here's a link to an article about it.

http://www.eng.uci.edu/node/1220

If you send me an email, I can put you in touch with the head of the
project who would be happy to supply all the info.

73, ac6xg

Steve Reinhardt wrote:
Jerry Martes wrote:

"Steve Reinhardt" wrote in
message ...

I have read a circularly polarized Yagi is appropriate for ARISS
communications. Is there a vendor that offers a crossed design? Or,
better still, is there a construction article that I can refer to?

What are you using for this type of communication?

I'm trying to set up a contact for my son's school class.

73,
Steve
W1KF



Hi Steve

Have you contacted the AMSAT guys (www.amsat.org)? I assume you
are aware of the need for gain required for you particular station.
I thought a linearly polarized 3 or 4 element Yagi was adequate.
So, I wonder if the complexity of making a crossed Yagi CP is
justified when that will have only 3 dB improvement with that same
boom length.

Jerry

Jerry,

All news to me, so far. The ARISS website suggested circular
polarization and up to 100W. AMSAT is saying 3 elements and an HT. Quite
a variation...

that's the difference between "maybe I can hit them with a HT in the
parking lot" and "Guaranteed contact with lots of link margin in front
of a crowd of expectant school children and news media"