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CX2SA > SATDIG 17.04.13 03:25l 970 Lines 31223 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Mount an Arrow on rotator with 2m vertical or horizontal
(Richard Lawn)
2. Half-duplex on the Kenwood TH-F6A (Robert Kovacs)
3. ALL AMSAT rooms at Hamvention 2013 taken (Alan)
4. Re: Half-duplex on the Kenwood TH-F6A (Paul Stoetzer)
5. Re: Half-duplex on the Kenwood TH-F6A
(Patrick STODDARD (WD9EWK/VA7EWK))
6. Re: Half-duplex on the Kenwood TH-F6A (Zach Leffke)
7. Re: Half-duplex on the Kenwood TH-F6A (Andrew Glasbrenner)
8. Re: [Tracking] PhoneSat launch April 17th! 437.425MHz
(Samudra Haque N3RDX & S21X)
9. Re: Half-duplex on the Kenwood TH-F6A (Zach Leffke)
10. Re: Half-duplex on the Kenwood TH-F6A (Andrew Glasbrenner)
11. Re: Mount an Arrow on rotator with 2m vertical or horizontal (Gus)
12. Re: for sale (Bruce R Brown)
13. Re: Mount an Arrow on rotator with 2m vertical or horizontal
(N0JY)
14. Re: Mount an Arrow on rotator with 2m vertical or horizontal
(Gary "Joe" Mayfield)
15. Re: Mount an Arrow on rotator with 2m vertical or horizontal
(Jeff KB2M)
----------------------------------------------------------------------
Message: 1
Date: Tue, 16 Apr 2013 15:33:41 -0400
From: Richard Lawn <rjlawn@xxxxx.xxx>
To: Amsat BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
Message-ID:
<CADQmrTGSWOyjAu9c7fySU8g1Us+ka5eSaJsQSVz2E2nj_y7JKA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I have both the Arrow and the Elk and am interested in trying them mounted
at a fixed elevation and would love to see pictures or
diagrams/explanations of how you have mounted the Arrow. The Elk is easy
and Ive got parts and info on how to mount it for rotor use.
TNX
Rick
W2JAZ
------------------------------
Message: 2
Date: Tue, 16 Apr 2013 20:20:39 +0000
From: Robert Kovacs <robert.kovacs.g4g4@xxxxxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Half-duplex on the Kenwood TH-F6A
Message-ID:
<3ED628DE96DBD14A9D4AE285CD6D4D6E0A5134D6@xxxxxxxx.xxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Someone earlier was asking about the TH-F6A.
As mater of terminology, is it called "half-duplex" or "cross-band split"?
The Kenwood TH-F6A has two receivers but will not work full duplex; you
cannot hear your own signal coming back down from the satellite.
What I do is use dual mode, so that both A & B are on, with the uplink on
one and the downlink on the other. Set the audio fully on the downlink
(because you don't want to listen to the uplink frequency) but leave the
active or primary on the uplink side. That way, you can hear the bird, and
when you key the PTT hopefully you can hit the bird. With an HT!
My experiences though are with the FM easysats (including AO-51 of happy
memory). Has anyone had any luck with this radio's SSB receivers for the
linear birds?
73,
Bob Kovacs.
KC2WYH
Amsat No. 38304.
------------------------------
Message: 3
Date: Tue, 16 Apr 2013 15:25:08 -0500
From: Alan <wa4sca@xxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Cc: amsat-fox@xxxx.xxx.xxx
Subject: [amsat-bb] ALL AMSAT rooms at Hamvention 2013 taken
Message-ID: <6BEB9C91F6F244EFBD929DD9EB2CBA7E@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
All,
Per Martha at the AMSAT Office, the entire block of AMSAT rooms for
Hamvention 2013 are now taken, and no more will be available.
73s,
Alan
WA4SCA
------------------------------
Message: 4
Date: Tue, 16 Apr 2013 16:29:49 -0400
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: Robert Kovacs <robert.kovacs.g4g4@xxxxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
Message-ID:
<CABzOSOoX=BBLJjTeHpAqVnXFPO__JXkrrb-q07fVGobCKb=CNQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Yes. Patrick, WD9EWK, has some experience using the TH-F6A as a downlink
receiver. I made one QSO on VO-52 with a TH-F6A, FT-817, and Arrow antenna.
I haven't gotten out to work the satellites in a while. I need to get back
there,
Hear is audio of my QSO with NS1Z on VO-52 back on 10/22/12.
https://soundcloud.com/paul-stoetzer/vo-52-10-22-12
73,
Paul, N8HM
On Tue, Apr 16, 2013 at 4:20 PM, Robert Kovacs <
robert.kovacs.g4g4@xxxxxxxxx.xxx> wrote:
>
> Someone earlier was asking about the TH-F6A.
>
> As mater of terminology, is it called "half-duplex" or "cross-band split"?
>
> The Kenwood TH-F6A has two receivers but will not work full duplex; you
> cannot hear your own signal coming back down from the satellite.
>
> What I do is use dual mode, so that both A & B are on, with the uplink on
> one and the downlink on the other. Set the audio fully on the downlink
> (because you don't want to listen to the uplink frequency) but leave the
> active or primary on the uplink side. That way, you can hear the bird, and
> when you key the PTT hopefully you can hit the bird. With an HT!
>
> My experiences though are with the FM easysats (including AO-51 of happy
> memory). Has anyone had any luck with this radio's SSB receivers for the
> linear birds?
>
> 73,
>
> Bob Kovacs.
> KC2WYH
> Amsat No. 38304.
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
>
------------------------------
Message: 5
Date: Tue, 16 Apr 2013 13:40:54 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
Message-ID:
<CAN6TEUengNVt1TOzeyZb4yDc4xgAYYBihdZV+=jRNiXemXUBhA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Robert,
> My experiences though are with the FM easysats (including AO-51 of happy
> memory). Has anyone had any luck with this radio's SSB receivers for the
> linear birds?
>
>
I have a TH-F6A, and have used it as the downlink receiver when working
SSB via satellite. I use an FT-817ND as my uplink transmitter, and will
occasionally use the TH-F6A as the downlink receiver in place of another
FT-817ND. The all-mode receiver in the TH-F6A is not as sensitive nor
as selective as the receiver in the FT-817ND for SSB and CW, but it can
work. I don't work the lowest passes on VO-52 with the TH-F6A as my
receiver, and only look at the higher passes for FO-29 - but it can work
this way.
I have recently purchased the 2m/70cm broadband preamp from AMSAT,
but have not had a chance to try it out. As long as I don't swamp the
front end of the TH-F6A's receiver, that HT with the preamp may be my
ticket to a better receive setup with the HT. Even without the preamp, I
have done demonstrations using an FT-817ND with a TH-F6A, making
for a very small and portable all-mode satellite station.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 6
Date: Tue, 16 Apr 2013 16:48:26 -0400
From: "Zach Leffke" <zleffke@xx.xxx>
To: <amsat-bb@xxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
Message-ID: <000601ce3ae3$be7a8210$3b6f8630$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
I have had some luck using the HT's SSB mode to listen to some of the
"Beepsat" beacons. This was done for educational purposes to show the
effects of polarization to non-believers. Using an arrow style antenna
(homebrew version) mounted on a tripod, we would dial in the CW beacon of a
bird with linear polarization. After matching up polarizations by twisting
the arrow to maximize the volume out of the TH-F6A we would have the
"onlookers" mentally note the volume of the beacon then quickly twist the
beam 90 degrees (while maintaining azimuth and elevation the same). The
previously clear and strong beacon would all but disappear from the audio.
We would then twist back 90 degrees and the beacons would come right back
nice and strong.
The onlooking non-believers jaws would drop, eyes would widen, and learning
would occur.
I have yet to try it out with the SSB voice transponders, mainly because you
can't transmit SSB so there's no chance of making a QSO with just the HT.
However, the future of the Amateur Satellites is evolving and we will "soon"
be seeing more software defined radio technology being incorporated into the
transponders. This technology will allow previously unheard of modes of
operation that could allow these types of HTs to complete a QSO. Imagine a
software defined transponder that receives an uplink in FM and downlinks
SSB. Piece of cake for the SDR wizards. A satellite that can do that is
good news for owners of these types of HTs. As mentioned by Patrick below,
these types of HTs will not match the performance of the work horse
satellite radios (FT-817, FT-847, FT-857, IC-910H, etc.), but for those good
high passes, with a decent antenna, I bet it will probably work.
-Zach, KJ4QLP
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Patrick STODDARD (WD9EWK/VA7EWK)
Sent: Tuesday, April 16, 2013 4:41 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
Robert,
> My experiences though are with the FM easysats (including AO-51 of
> happy memory). Has anyone had any luck with this radio's SSB receivers
> for the linear birds?
>
>
I have a TH-F6A, and have used it as the downlink receiver when working SSB
via satellite. I use an FT-817ND as my uplink transmitter, and will
occasionally use the TH-F6A as the downlink receiver in place of another
FT-817ND. The all-mode receiver in the TH-F6A is not as sensitive nor as
selective as the receiver in the FT-817ND for SSB and CW, but it can work.
I don't work the lowest passes on VO-52 with the TH-F6A as my receiver, and
only look at the higher passes for FO-29 - but it can work this way.
I have recently purchased the 2m/70cm broadband preamp from AMSAT, but have
not had a chance to try it out. As long as I don't swamp the front end of
the TH-F6A's receiver, that HT with the preamp may be my ticket to a better
receive setup with the HT. Even without the preamp, I have done
demonstrations using an FT-817ND with a TH-F6A, making for a very small and
portable all-mode satellite station.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsue, 16 Apr 2013 17:11:14 -0400 (GMT-04:00)
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: Zach Leffke <zleffke@xx.xxx>, amsat-bb@xxxxxx.xxxx
amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
Message-ID:
<18640417.1366146674976.JavaMail.root@xxxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
-----Original Message-----
>From: Zach Leffke <zleffke@xx.xxx>
> This technology will allow previously unheard of modes of
>operation that could allow these types of HTs to complete a QSO. Imagine a
>software defined transponder that receives an uplink in FM and downlinks
>SSB.
I did that on AO-16 after we put it in "bent pipe" mode, although that was
FM to DSB. The ISIS cubesat radios also have this ability, and I think we'll
see it on some of those soon.
73, Drew KO4MA
------------------------------
Message: 8
Date: Tue, 16 Apr 2013 17:10:53 -0400
From: "Samudra Haque N3RDX & S21X" <n3rdx@xxxxx.xxx>
To: Amsat-bb <amsat-bb@xxxxx.xxx>, "amsat-dc@xxxxx.xxxx
<amsat-dc@xxxxx.xxx>
Subject: [amsat-bb] Re: [Tracking] PhoneSat launch April 17th!
437.425MHz
Message-ID:
<CAJEM476aKyvdDG_jwJEs=Q6UOheMiEPJi=oj+WvAmu4eOGMmMA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
An updated website with telemetry info is now available. Please note the
launch date/time may change. I hope others will consider taking up the
challenge to track 3 satellites operating on the same frequency and flying
extremely close to each other.
http://www.phonesat.org/packets.php
73 de NRDX
On Thu, Apr 11, 2013 at 12:04 AM, Samudra Haque N3RDX & S21X <
n3rdx@xxxxx.xxx> wrote:
> I am forwarding a request from NASA ARC Phonesat project, relevant to my
> mail earlier yesterday. This is a 3-for-1 special for amsat community.
>
> 73 de N3RDX
>
> ---------- Forwarded message ----------
> From: Wolfe, Jasper Lewis. (ARC-RD)[Stinger Ghaffarian Technologies Inc.
> (SGT Inc.)] <jasper.l.wolfe@xxxx.xxx>
> Date: Wed, Apr 10, 2013 at 3:05 PM
> Subject: Re: [Tracking] PhoneSat launch April 17th! 437.425MHz
> Cc: "Guillen Salas, Alberto (ARC-SST)[Stinger Ghaffarian Technologies Inc.
> (SGT Inc.)]" <alberto.guillensalas@xxxx.xxx>, "Tintore Gazulla, Oriol
> (ARC-TH)[Stinger Ghaffarian Technologies Inc. (SGT Inc.)]" <
> oriol.tintoregazulla@xxxx.xxx>
>
>
> Hello CubeSats and Amateur Radio Operators!
>
> The very first PhoneSat?s will be launching aboard the Antares on April 17
> th at 1700 EDT (launch window to April 19th possibly further). We have
> manifested 2x PhoneSat 1.0 and 1x PhoneSat 2.0 Beta.****
>
> ** **
>
> Our orbit is very low (270km x 300km 51.6deg) and we?ll only be up there
> for 2 weeks! So we?re looking for as many people as possible to help with
> tracking our satellites!****
>
> ** **
>
> If any of you are interested in tracking the satellite please let myself
> (+the cc?d team) know ? your help will be greatly appreciated! ****
>
> ** **
>
> All three satellites will be transmitting on *437.425MHz* and TLE?s +
> more info can be found at www.phonesat.org ? consolidated info sheet
> attached.****
>
> ** **
>
> Feel free to tune-in and submit packets to www.phonesat.org ****
>
> ** **
>
> Cheers!****
>
> PhoneSat Project****
>
> NASA ARC****
>
> ** **
>
> This time attached :D****
>
> _______________________________________________
> Earthstation mailing list
> Earthstation@xxxxxxx.xxx
> http://lists.cubesat.org/mailman/listinfo/earthstation
>
>
>
------------------------------
Message: 9
Date: Tue, 16 Apr 2013 17:26:08 -0400
From: "Zach Leffke" <zleffke@xx.xxx>
To: "'Andrew Glasbrenner'" <glasbrenner@xxxxxxxxxx.xxx>,
<amsat-bb@xxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
Message-ID: <000901ce3ae9$02845120$078cf360$@xx.xxx>
Content-Type: text/plain; charset="utf-8"
Ahhh, my apologies Drew. I should have said previously uncommon modes
instead of unheard of modes. As I am relatively new to the Amateur
Satellite community, I'm sure there is plenty that I am unaware of, and this
is an example of that. Again, my apologies. I'm looking forward to seeing
how things play out in the future.
-Zach, KJ4QLP
-----Original Message-----
From: Andrew Glasbrenner [mailto:glasbrenner@xxxxxxxxxx.xxxx
Sent: Tuesday, April 16, 2013 5:11 PM
To: Zach Leffke; amsat-bb@xxxxxx.xxxx amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
-----Original Message-----
>From: Zach Leffke <zleffke@xx.xxx>
> This technology will allow previously unheard of modes of operation
>that could allow these types of HTs to complete a QSO. Imagine a
>software defined transponder that receives an uplink in FM and
>downlinks SSB.
I did that on AO-16 after we put it in "bent pipe" mode, although that was
FM to DSB. The ISIS cubesat radios also have this ability, and I think we'll
see it on some of those soon.
73, Drew KO4MA
------------------------------
Message: 10
Date: Tue, 16 Apr 2013 17:28:30 -0400 (GMT-04:00)
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: Zach Leffke <zleffke@xx.xxx>, amsat-bb@xxxxxx.xxxx
amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
Message-ID:
<12685615.1366147710956.JavaMail.root@xxxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Nah, no worries! It's a fun mode, but can be a challenge tuning to keep up
by hand.
73, Drew KO4MA
-----Original Message-----
>From: Zach Leffke <zleffke@xx.xxx>
>Sent: Apr 16, 2013 5:26 PM
>To: 'Andrew Glasbrenner' <glasbrenner@xxxxxxxxxx.xxx>, amsat-bb@xxxxxx.xxxx
amsat-bb@xxxxx.xxx
>Subject: RE: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
>
>Ahhh, my apologies Drew. I should have said previously uncommon modes
instead of unheard of modes. As I am relatively new to the Amateur
Satellite community, I'm sure there is plenty that I am unaware of, and this
is an example of that. Again, my apologies. I'm looking forward to seeing
how things play out in the future.
>
>-Zach, KJ4QLP
>
>-----Original Message-----
>From: Andrew Glasbrenner [mailto:glasbrenner@xxxxxxxxxx.xxxx
>Sent: Tuesday, April 16, 2013 5:11 PM
>To: Zach Leffke; amsat-bb@xxxxxx.xxxx amsat-bb@xxxxx.xxx
>Subject: Re: [amsat-bb] Re: Half-duplex on the Kenwood TH-F6A
>
>
>
>
>-----Original Message-----
>>From: Zach Leffke <zleffke@xx.xxx>
>> This technology will allow previously unheard of modes of operation
>>that could allow these types of HTs to complete a QSO. Imagine a
>>software defined transponder that receives an uplink in FM and
>>downlinks SSB.
>
>I did that on AO-16 after we put it in "bent pipe" mode, although that was
FM to DSB. The ISIS cubesat radios also have this ability, and I think we'll
see it on some of those soon.
>
>73, Drew KO4MA
>
>
>
------------------------------
Message: 11
Date: Tue, 16 Apr 2013 17:52:58 -0400
From: Gus <8p6sm@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
Message-ID: <516DC83A.8070408@xxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
No reason why not. The power at each antenna will be 3 dB down, but you
will get an additional 3 dB of gain for using two antennas, so there
will be (nominally) no loss, assuming the antennas are oriented the same.
Or you could orient them 90 degrees apart, use an electrical 1/4 wave
matching section of 75 ohm coax on each antenna, plus an electrical 1/4
wave phasing section of 50 ohm coax on ONE antenna, and you have CP
radiation. Use a double-throw relay to switch the phasing section from
one antenna to the next, and you have switchable RHCP/LHCP. In this
case you WILL suffer a 3 dB penalty when working signals with linear
polarization.
Another possibility I want to try some day: use a radio with diversity
reception (like IC-2820). Connect one horizontal antenna and one
vertical. No matching or phasing, no manual switching of circularity.
Just let the receiver decide which antenna is pulling in the strongest
signal on a moment by moment basis. Tx polarity is fixed, but you can
turn up the wick to compensate!
On 04/16/2013 02:31 PM, Douglas Phelps wrote:
> Any reason why, using identical coax lengths, you could not transform the
> impedance to 100 ohms and then use a T connector to sum both antenna
signals and
> achieve 50 ohms to the radio? I know Transmit power will be 3 dB down at
either
> antenna but is there any reason it will not work? Any antenna gurus out
there?
>
>
>
>
> ________________________________
> From: R.T.Liddy <k8bl@xxxxxxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Sent: Tue, April 16, 2013 11:46:35 AM
> Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
>
> For the Satellites, it completely doesn't matter. At any given moment,
> you only have 1 chance in 90 that you will have matching polarization.
>
> So, if you plan to use the antenna for other than Satellites, set your
> polarization
> for that purpose (V for FM or H for SSB/CW).
>
> My plan is to install 2 Elk antennas, one V and one H. Then, have a relay
that
> I can switch between the two and choose the best downlink signal at any
> given moment. This arrangement will also give me optimum flexibility for
> terrestrial operation on 2 & 440.
>
> Now, where can I find a relay to do that function?????
>
> 73/GL, Bob K8BL
>
>
> --- On Tue, 4/16/13, Lee Maisel <maisel@xxxx.xxx> wrote:
>
>
> From: Lee Maisel <maisel@xxxx.xxx>
> Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
> To: "Don Hoover (WS4E)" <ws4e@xxxx.xxx>
> Cc: amsat-bb@xxxxx.xxx
> Date: Tuesday, April 16, 2013, 12:24 AM
>
>
> Hi Don,
>
> I have mine mounted with 2m elements horizontal, because that's how it
> seems I used it most when it was handheld.
>
> Lee
> W5LMM
>
>
> Don Hoover (WS4E) wrote:
>> Just wondering, should I mount my arrow with the 2m elements oriented
>> vertical or horizontal?
>>
>> I am planning on putting it at 15deg and just using a az rotator.
>>
>> Does it even matter which way its oriented since the polarity of the sats
>> are always changing?
>>
>> Maybe I should mount it like this: / instead.
>>
>> Just curious what some thought was the best way to go.
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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
>>
>>
>
--
73, de Gus 8P6SM
Barbados, the easternmost isle.
------------------------------
Message: 12
Date: Tue, 16 Apr 2013 17:28:56 -0500
From: "Bruce R Brown" <willmarbrowns@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: for sale
Message-ID: <9860DD3FD4E44BAF97B18E1EBD071A6B@xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
both trackers are sold...tu
bruce ke0lx
------------------------------
Message: 13
Date: Tue, 16 Apr 2013 17:03:00 -0500
From: N0JY <n0jy@xxxxxxx.xxx>
To: AMSAT-BB <athe polarity of the sats
>> are always changing?
>>
>> Maybe I should mount it like this: / instead.
>>
>> Just curious what some thought was the best way to go.
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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
>>
>>
>
------------------------------
Message: 14
Date: Tue, 16 Apr 2013 19:52:20 -0500
From: "Gary \"Joe\" Mayfield" <gary_mayfield@xxxxxxx.xxx>
To: "'AMSAT-BB'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
Message-ID: <BAY173-DS182F1EF1D93687C3F52A008ACE0@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
It can work well. At w0wtn we did circular for VHF and UHF in 2005.
There is a picture of the setup here:
http://www.w0wtn.org/img_browse.php?i=/images/field_day_2005/KK0SD_Sat_Ant.j
pg
I took the phasing info straight from the Satellite Experimenter's Handbook.
You might notice the S Band cavity backed Helix as well :-)
73,
Joe kk0sd
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of N0JY
Sent: Tuesday, April 16, 2013 5:03 PM
To: AMSAT-BB
Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
I did it at field day last year, a couple of Arrow antennas with the 2
meter side set up for RHCP. Seemed to work real well on the analog birds.
Some 75 ohm coax does the matching, see a picture at
http://www.n0jy.org/images/IMG_20120623_215906.jpg
The picture was taken at night, so look closely and you'll see a 1/4
wave 75 ohm section at the tee to both sides, the right side directly to
the antenna and the left side to another 1/4 wave 50 ohm section
connected to the antenna.
Credit goes to SV1BSX I got the idea from his web site
http://sv1bsx.50webs.com/antenna-pol/polarization.html
Jerry
N0JY
On 4/16/2013 1:31 PM, Douglas Phelps wrote:
> Any reason why, using identical coax lengths, you could not transform the
> impedance to 100 ohms and then use a T connector to sum both antenna
signals and
> achieve 50 ohms to the radio? I know Transmit power will be 3 dB down at
either
> antenna but is there any reason it will not work? Any antenna gurus out
there?
>
>
>
>
> ________________________________
> From: R.T.Liddy <k8bl@xxxxxxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Sent: Tue, April 16, 2013 11:46:35 AM
> Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
>
> For the Satellites, it completely doesn't matter. At any given moment,
> you only have 1 chance in 90 that you will have matching polarization.
>
> So, if you plan to use the antenna for other than Satellites, set your
> polarization
> for that purpose (V for FM or H for SSB/CW).
>
> My plan is to install 2 Elk antennas, one V and one H. Then, have a relay
that
> I can switch between the two and choose the best downlink signal at any
> given moment. This arrangement will also give me optimum flexibility for
> terrestrial operation on 2 & 440.
>
> Now, where can I find a relay to do that function?????
>
> 73/GL, Bob K8BL
>
>
> --- On Tue, 4/16/13, Lee Maisel <maisel@xxxx.xxx> wrote:
>
>
> From: Lee Maisel <maisel@xxxx.xxx>
> Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
> To: "Don Hoover (WS4E)" <ws4e@xxxx.xxx>
> Cc: amsat-bb@xxxxx.xxx
> Date: Tuesday, April 16, 2013, 12:24 AM
>
>
> Hi Don,
>
> I have mine mounted with 2m elements horizontal, because that's how it
> seems I used it most when it was handheld.
>
> Lee
> W5LMM
>
>
> Don Hoover (WS4E) wrote:
>> Just wondering, should I mount my arrow with the 2m elements oriented
>> vertical or horizontal?
>>
>> I am planning on putting it at 15deg and just using a az rotator.
>>
>> Does it even matter which way its oriented since the polarity of the sats
>> are always changing?
>>
>> Maybe I should mount it like this: / instead.
>>
>> Just curious what some thought was the best way to go.
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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
------------------------------
Message: 15
Date: Tue, 16 Apr 2013 21:16:22 -0400
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
To: "'AMSAT-BB'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
Message-ID: <00a901ce3b09$2c5b2bc0$85118340$@xxx>
Content-Type: text/plain; charset="us-ascii"
Or check out the plans (from the AO-40 days) and build notes on how to build
a circular phasing harness for the arrow 70cm crossed yagi on my website
http://home.comcast.net/~kb2m/
It also describes in detail how I used an MFJ 259 to fine tune the
harness...
73 Jeff kb2m
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Gary "Joe" Mayfield
Sent: Tuesday, April 16, 2013 20:52 PM
To: 'AMSAT-BB'
Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
It can work well. At w0wtn we did circular for VHF and UHF in 2005.
There is a picture of the setup here:
http://www.w0wtn.org/img_browse.php?i=/images/field_day_2005/KK0SD_Sat_Ant.j
pg
I took the phasing info straight from the Satellite Experimenter's Handbook.
You might notice the S Band cavity backed Helix as well :-)
73,
Joe kk0sd
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of N0JY
Sent: Tuesday, April 16, 2013 5:03 PM
To: AMSAT-BB
Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
I did it at field day last year, a couple of Arrow antennas with the 2 meter
side set up for RHCP. Seemed to work real well on the analog birds.
Some 75 ohm coax does the matching, see a picture at
http://www.n0jy.org/images/IMG_20120623_215906.jpg
The picture was taken at night, so look closely and you'll see a 1/4 wave 75
ohm section at the tee to both sides, the right side directly to the antenna
and the left side to another 1/4 wave 50 ohm section connected to the
antenna.
Credit goes to SV1BSX I got the idea from his web site
http://sv1bsx.50webs.com/antenna-pol/polarization.html
Jerry
N0JY
On 4/16/2013 1:31 PM, Douglas Phelps wrote:
> Any reason why, using identical coax lengths, you could not transform the
> impedance to 100 ohms and then use a T connector to sum both antenna
signals and
> achieve 50 ohms to the radio? I know Transmit power will be 3 dB down at
either
> antenna but is there any reason it will not work? Any antenna gurus out
there?
>
>
>
>
> ________________________________
> From: R.T.Liddy <k8bl@xxxxxxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Sent: Tue, April 16, 2013 11:46:35 AM
> Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
>
> For the Satellites, it completely doesn't matter. At any given moment,
> you only have 1 chance in 90 that you will have matching polarization.
>
> So, if you plan to use the antenna for other than Satellites, set your
> polarization
> for that purpose (V for FM or H for SSB/CW).
>
> My plan is to install 2 Elk antennas, one V and one H. Then, have a relay
that
> I can switch between the two and choose the best downlink signal at any
> given moment. This arrangement will also give me optimum flexibility for
> terrestrial operation on 2 & 440.
>
> Now, where can I find a relay to do that function?????
>
> 73/GL, Bob K8BL
>
>
> --- On Tue, 4/16/13, Lee Maisel <maisel@xxxx.xxx> wrote:
>
>
> From: Lee Maisel <maisel@xxxx.xxx>
> Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or
horizontal
> To: "Don Hoover (WS4E)" <ws4e@xxxx.xxx>
> Cc: amsat-bb@xxxxx.xxx
> Date: Tuesday, April 16, 2013, 12:24 AM
>
>
> Hi Don,
>
> I have mine mounted with 2m elements horizontal, because that's how it
> seems I used it most when it was handheld.
>
> Lee
> W5LMM
>
>
> Don Hoover (WS4E) wrote:
>> Just wondering, should I mount my arrow with the 2m elements oriented
>> vertical or horizontal?
>>
>> I am planning on putting it at 15deg and just using a az rotator.
>>
>> Does it even matter which way its oriented since the polarity of the sats
>> are always changing?
>>
>> Maybe I should mount it like this: / instead.
>>
>> Just curious what some thought was the best way to go.
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 8, Issue 119
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