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CX2SA > SATDIG 13.10.15 18:56l 889 Lines 31240 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Just Checking... (AO-85) (Burns Fisher)
2. Re: Decoding AO-85 from IC-910H 9600 data socket - any
success anyone? -- Success! (Eric Knaps, ON4HF)
3. Upcoming ARISS contact with Bay View Elementary School,
Burlington, WA (n4csitwo@xxxxxxxxx.xxxx
4. Re: Eimac Moonbounce - I8CVS (M.Sc. Pavel Milanes Costa)
5. Arrow Antenna (W3MAT .)
6. Re: Arrow Antenna (Bryan Green)
7. Re: Arrow Antenna (B J)
8. Re: Arrow Antenna (J. Boyd (JR2TTS))
9. Monday evening AO-85 passes at WD9EWK...
(Patrick STODDARD (WD9EWK/VA7EWK))
10. Re: Arrow Antenna (Bryan Green)
11. Re: Arrow Antenna (J. Boyd (JR2TTS))
12. Re: Arrow Antenna (Steve Kristoff)
13. Re: Arrow Antenna (Mvivona)
14. LEARNING & POSSIBLE MEMBERSHIP (b)
----------------------------------------------------------------------
Message: 1
Date: Mon, 12 Oct 2015 11:19:29 -0400
From: Burns Fisher <burns@xxxxxx.xx>
To: w3mat@xxxxxxx.xxxx AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Just Checking... (AO-85)
Message-ID:
<CABX7KxWyzpVLBdpkSbfHdom7=pGWONgQ-y+dxX1=7XQ3FUEA5Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I'm sorry you did not like some of the replies on FB, but I would truly say
that this is a new bird, and the suggestion that you try multiple things
was not in jest, especially the bandwidth. At some point as the bandwidth
you are transmitting gets wider, I'd guess that the voltage incoming from
the Rx to the A/D converter in the satellite exceeds its capabilities and
it clips. But on the other hand if the B/W is too narrow, the gain will be
low. I used 'narrow' in pre-flight testing from my HT but there is not
guarantee that the flight board will work exactly the same way.
A few other thoughts but no certain answers:
1) You said you heard other stations. How much power do you have? You
said HT, so I assume 5W or less. Remember that FM is only single-channel
and usually the strongest signal wins. (But also remember the standard
rule to use as little power as you can successfully use). Some people have
managed with 5W HTs. Others have not.
2) The bird seems to be tumbling quite a lot now. The 70cm Rx antenna may
be even more subject to fading than the Tx antenna since the Rx is only on
one side, while the Tx uses both sides and the satellite itself to radiate
from. (The thought about fading is somewhat informed speculation).
3) The 67Hz tone may take a second to kick on the transmitter but once it
is on it will stay on for the duration of the hang timer, which is one
minute. So if you have have to kick the hang timer with low power it will
be harder due to fades.
4) When the hang timer is hanging (during that 60 seconds) if there is
nothing being received, the transponder is going to resend the noise that
it hears from the Rx. When listening, I can tell the difference between
"no carrier from the satellite" and "satellite is transmitting the output
of a receiver that is receiving nothing". The latter has fewer high
frequencies and fewer low frequencies, i.e. it is duller. If you can hear
that difference, the latter case would be a good time to try to get in. No
one is blocking you, and the hang timer is already running.
Seriously, detailed reports you make of both success and failure will be
helpful to others!
73,
Burns W2BFJ
Fox-1 Flight Software
------------------------------
Message: 2
Date: Mon, 12 Oct 2015 21:26:48 +0200
From: "Eric Knaps, ON4HF" <on4hf@xxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Decoding AO-85 from IC-910H 9600 data socket -
any success anyone? -- Success!
Message-ID: <561C0978.4000407@xxxxxxx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Hello,
I also wanted to try decoding the Fox telemetry with my IC-910H without
any luck. My 9600 data socket was connected to my"mic in" on my desktop
computer.
Changed to "line in" on my sound card.
Wow! What a difference! On the last pass I decoded 113 frames.
By the way, thanks Bob for the contact on AO-7 a few days ago.
73,
Eric.
Amateur radio station ON4HF
Satellite manager UBA
Member Amsat-NA
Member Amsat-UK
Member Amsat-ON
http://www.on4hf.be
Op 11/10/2015 om 14:57 schreef Bob Mattaliano:
> Bob,
>
> Thanks for the response. Was using my desktop "mic-in" jack.
> Soundcard is a built in on my Dell Optiplex 755. Very limited
> functionality with driver provided, i.e., poor mic input level control
> and (my) concerns that sub-audible frequencies lost.
>
> So, switched to a cheap USB soundcard (Begringer UCA202) which
> happened to be on-hand. Claimed OK down to 10 Hz. Not fancy, but can
> input control level.
>
> TADA! Works!
>
> 73 es tks agn,
>
> Bob
>
> ---------------
>
> From: KO6TZ Bob<my.callsign@xxxxxxx.xxx>
> To:amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] Decoding AO-85 from IC-910H 9600 data socket -
> any success anyone?
> Message-ID:<56196FA9.9050407@xxxxxxx.xxx>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Bob,
>
>
> So far I have uploaded 276 frames of telemetry using the 9600 port of
> the sub-band on my IC910h. This is wired directly to the "Line-In" of
> my desk top computer.
>
> I would not recommend using the "Mic-In" jack, or a laptop computer.
> The 9600 port is used because it offers less filtering of the 0-200 Hz
> of the audio band pass. This is the portion that is filtered heavily to
> make PL tones sub audible in the radio , as well as remove 60 Hz and its
> 3rd at 180 Hz from the microphone input.
>
>
> BOB KO6TZ
>
>
>
> On 10/10/2015 10:30, Bob Mattaliano wrote:
>> Hi,
>>
>> Congrats to the AO-85 team!
>>
>> Trying to decode telemetry using the 9600 output of the sub data
>> (while radio is in Sat mode) from my IC-910H. Has anyone been able
>> to do this? High elevation passes only?
>>
>> 9600 output is connected directly to mic input. No isolation
>> transformers, etc. Seems like those making progress have gone the
>> SDR route with IQ data?
>>
>> Sound card input - 2 channel (L-R channels connected on cable), 24
>> bit, 48000 Hz
>>
>> radio - cable to sub band data socket. 9600 bps transmission on. (Is
>> this for TX only, does not change output and can be left of?)
>>
>> AO-85 software
>>
>> Source - mic input, 4800
>>
>> start --> no joy,
>>
>> Suggestions welcome.
>>
>> Thanks, es 73
>>
>> Bob N6RFM
>> n6rfm1@xxxxx.xxx
>>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 3
Date: Mon, 12 Oct 2015 16:44:39 -0400
From: <n4csitwo@xxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Upcoming ARISS contact with Bay View Elementary
School, Burlington, WA
Message-ID: <A04ADA870E974D2CAAFCACB7124ED54D@xxx>
Content-Type: text/plain; charset="iso-8859-1"
An International Space Station school contact has been planned with
participants at Bay View Elementary School, Burlington, WA
on 14 Oct. The event is scheduled to begin at approximately 19:41 UTC. It is
recommended that you start listening approximately 10 minutes before this
time.The duration of the contact is approximately 9 minutes and 30 seconds.
The contact will be a telebridge between OR4ISS and IK1SLD. The contact
should be audible over Italy and adjacent areas. Interested parties are
invited to listen in on the 145.80 MHz downlink. The contact is expected to
be conducted in English.
Bay View School in Burlington, Washington has been serving kindergarten
through eighth grade students in the Burlington-Edison School District for
22 years. Named after the small community of Bayview, which was later
incorporated by the town of Burlington, it serves mainly in-district
neighborhood students. This year 562 students are enrolled. The town of
Burlington is 66 miles north of Seattle, Washington. Located at the
intersection of two major highways, Burlington serves as a retail and
commercial hub for the region. Industry is mainly agricultural, retail, and
commercial.
Over the past three years, Bay View has committed to becoming a school of
inquiry. Through inquiry and collaboration, Bay View's purpose is to nurture
compassionate, creative, knowledgeable growth-minded world citizens, who
pursue dreams and positively impact the future. Bay View continually
inquires to understand one essential question. What do we need to
understand, commit to and implement to prepare students to be career,
college, and/or world ready for the 21st century? This journey has led them
to begin creating concept-based units of inquiry at each grade level.
Multi-disciplinary and intra-disciplinary units support school-wide
connections through inquiry. The opportunity to ask questions of astronauts
on the ISS was pursued as an experience that could spark students' interest
in space, engineering, technology, mathematics, and support a school-wide
inquiry.
Participants will ask as many of the following questions as time allows:
1. How do astronauts walk in space?
2. How do you exercise in space?
3. What can you see from the ISS?
4. Are you allowed to have pets in space?
5. Is time different in space if so by how much?
6. How do the astronauts use technological devices like iPads in space if
there is no Wifi?
7. Which planets do you study most and why?
8. What is the daily schedule like in space?
9. Is there a way to grow plants in space?
10. How does zero gravity affect bone mass?
11. What do you do for fun?
12. What does the sun look like in space?
13. How do you take a shower or bath in space without water going
everywhere?
14. How do astronauts go to the bathroom?
15. Why did you want to go to outerspace?
16. What are you researching to help people on Earth and why?
17. When you break a bone, will it heal faster or slower in space?
18. What happens if you get sick in space?
19. What is the weather like in space?
20. What is a weirder feeling, going from gravity to zero gravity or from
zero gravity to gravity?
PLEASE CHECK THE FOLLOWING FOR MORE INFORMATION ON ARISS UPDATES:
Visit ARISS on Facebook. We can be found at Amateur Radio on the
International Space Station (ARISS).
To receive our Twitter updates, follow @xxxxxxxxxxxx
Next planned event(s):
TBD
ARISS is an international educational outreach program partnering the
volunteer support and leadership from AMSAT and IARU societies around the
world with the ISS space agencies partners: NASA, Russian Space Agency, ESA,
CNES, JAXA, and CSA.
ARISS offers an opportunity for students to experience the excitement of
Amateur Radio by talking directly with crewmembers on-board the
International Space Station. Teachers, parents and communities see, first
hand, how Amateur Radio and crewmembers on ISS can energize youngsters'
interest in science, technology, and learning. Further information on the
ARISS program is available on the website http://www.ariss.org/
Thank you & 73,
David - AA4KN
---
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------------------------------
Message: 4
Date: Mon, 12 Oct 2015 19:24:41 -0400
From: "M.Sc. Pavel Milanes Costa" <co7wt@xxxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Eimac Moonbounce - I8CVS
Message-ID: <561C4139.6010501@xxxxxx.xx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
A flash back from a 3rd country....
El 12/10/15 a las 02:50, Phil Karn escribi?:
> Years ago I came to the conclusion that the best way to preseve digital
> information is to "keep it spinning"
That's what my team calls a "live repository of information", we in Cuba
with almost ZERO network available have managed to create a live
repository... the live example of "Keep it spinning"
A few technical oriented group of people - hamradio operators or not -
have a huge doc repository (tech papers, articles, blueprints,
operating/technical manuals/schematics of any type, handbooks, etc) that
get mirrored as flash drives and huge USB portable HDDs. When some one
have a new bunch of GBs of good info it notifies the group and the
propagation of the info begins... every member has it's subject of
interest, but we have manage to get at least 2 copies of the same info...
Copyrights is not an issue here at least for the moment.
A few times in the year I get request from one or more people of the
group to meet and recover a few Gb of info about X subject after it's
HDD collapse, even I had used this trick a few months ago with the loss
of my 1TB Portable drive to recover the ~25 Gb ham/commercial radio
manual/schematics folder organized by manufacturer and even the
CAT/Programming soft for almost all...
Only if the info is alive and moving it will prevail and never die,
CD/DVD are good for a year or two, but no more...
That's my live example of the "Keep it spinning" of Phil
73 from Cuba, CO7WT.
------------------------------
Message: 5
Date: Tue, 13 Oct 2015 01:23:27 -0400
From: "W3MAT ." <w3mat03@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Arrow Antenna
Message-ID:
<CAK=nGPZpjMsYRrzwMoZMhpPnsi0arVddFw15xUS6Zu7ZcFk1iQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Has anyone removed the duplexer and its coax and replaced it with one coax
cable to VHF, and one coax cable to UHF for two radio operation? If so,
did you notice any improvement and what would the power rating be now
without the duplexer?
------------------------------
Message: 6
Date: Mon, 12 Oct 2015 22:28:40 -0700
From: Bryan Green <bryan@xxxxx.xxx>
To: "W3MAT ." <w3mat03@xxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Arrow Antenna
Message-ID: <D0C82B9D-4295-4C17-8D32-8E834D55C39B@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I use mine that way with power up to 20 watts sometimes. I do not hold the
antenna; it is on a tripod.
My brilliant friend Sawson KG6NUB uses that same configuration with
something like 100 watts for what he calls "low power EME".
Other observations will no doubt be forthcoming.
-- bag
Bryan KL7CN/W6
On Oct 12, 2015, at 22:23, W3MAT . <w3mat03@xxxxx.xxx> wrote:
Has anyone removed the duplexer and its coax and replaced it with one coax
cable to VHF, and one coax cable to UHF for two radio operation? If so,
did you notice any improvement and what would the power rating be now
without the duplexer?
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 7
Date: Tue, 13 Oct 2015 06:00:25 +0000
From: B J <va6bmj@xxxxx.xxx>
To: "W3MAT ." <w3mat03@xxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Arrow Antenna
Message-ID:
<CAP7QzkNae_HT3fHkLYhPP3RJ9fTWMSka1vGXRO=kfDReiMFobA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 10/13/15, W3MAT . <w3mat03@xxxxx.xxx> wrote:
> Has anyone removed the duplexer and its coax and replaced it with one coax
> cable to VHF, and one coax cable to UHF for two radio operation?
I use mine that way for full-duplex operation with my IC-910.
If so,
> did you notice any improvement and what would the power rating be now
> without the duplexer?
Since I hold the antenna while I'm operating, I put 5 W into it. That
usually is enough to reach the satellite.
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
Message: 8
Date: Tue, 13 Oct 2015 15:02:43 +0900
From: "J. Boyd (JR2TTS)" <the2belo@xxx.xxxxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Arrow Antenna
Message-ID: <20151013145702.AB3A.THE2BELO@xxx.xxxxxxx.xx.xx>
Content-Type: text/plain; charset="UTF-8"
On Tue, 13 Oct 2015 01:23:27 -0400, "W3MAT ." <w3mat03@xxxxx.xxx> wrote:
> Has anyone removed the duplexer and its coax and replaced it with one coax
> cable to VHF, and one coax cable to UHF for two radio operation? If so,
> did you notice any improvement and what would the power rating be now
> without the duplexer?
I have done this for all SO-50 passes because I want to hear my own
downlink (and record the results with a voice recorder from the downlink
HT earphone out) but I didn't notice any discernible difference without
the duplexer because I'm only running 5W. (Antenna is handheld.)
Arrow Antennas states that max power for the Alaskan Arrow (the type I
own) without the duplexer on a tripod is 150W. (See FAQ at
http://www.arrowantennas.com/arrowii/alaskanarrow.html)
--
J. Boyd, JR2TTS/NI3B
the2belo@xxx.xxxxxxx.xx.xx
http://www.flickr.com/photos/the2belo/
http://www.qrz.com/db/JR2TTS
Twitter: @xxxxxxxx
------------------------------
Message: 9
Date: Tue, 13 Oct 2015 06:15:11 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Monday evening AO-85 passes at WD9EWK...
Message-ID:
<CAN6TEUffJGk+KVZxZkptHvRG8iOgc1B_UE=fSJasPcCTko0Tng@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi!
No QSOs went in the log on either AO-85 pass I worked this evening, but I
was able to collect 32 data frames on these passes, and unsuccessfully
tried a different HT on these passes (Anytone TERMN-8R). I'll come back
to this radio after I return from Dayton. I used the same two setups on
both passes:
Station 1: AnyTone TERMN-8R 2m/70cm HT, Elk handheld 2m/70cm log periodic
Station 2: SDRplay RSP receiver, 8-inch Windows 10 tablet, HDSDR,
connected to AMSAT-UK (Winkler) VHF crossed dipole on 8-foot
mast and tripod
The first pass came by around 0130 UTC. This was a very high pass, up to
almost 72 degrees elevation. Lots of stations on from coast to coast. I
tried to get through with the TERMN-8R/Elk combination. I think I heard
myself early in this pass, but was covered up by a stronger station.
Other than that one instance, I never heard myself through the satellite
on this pass, and didn't hear myself on the HDSDR recording from my other
station. Even though I made no QSOs, I was able to upload 30 data frames
from this pass. Not bad for a portable station with an omnidirectional
antenna on an 8-foot mast and tripod (probably closer to 10 feet/3m high,
including the height of both mast and tripod).
For the later pass around 0311 UTC, I moved my station to my driveway, so
I had a better view to the west and northwest. It was a lower pass, with
maximum elevation of 15 degrees. I didn't hear myself get through on this
pass, but not from a lack of trying. A nice bit of voice activity from
stations along the west coast, and up to VE6WK in Calgary before my LOS.
The SDR receive setup was able to upload 2 data frames from this pass. If
I had my Elk connected to the SDRplay, I am sure I could have pulled a few
more frames from this pass.
The HT I used on this pass is the AnyTone TERMN-8R 2m/70cm FM HT. It was
briefly sold in the US earlier this year, but was pulled from the market.
I bought it earlier this year, used it with SO-50 previously (half-duplex -
lots of desense, like with other Chinese-made dual-band HTs), and have been
waiting for AO-85 to arrive. Its receiver is similar in performance to the
Wouxun KG-UV8D when working this satellite, and not as good as the KG-UV9D.
It is very important to have the best possible signal in the receiver with
this radio, as its performance drops off quickly as the signals weaken. The
TERMN-8R is not as sensitive as most Icom/Kenwood/Yaesu dual-band HTs, and
not as sensitive as the KG-UV9D. I was able to copy the downlink OK, but
due to a variety of issues I only heard part of one transmission early in
the first pass I worked. I will come back to this radio after the AMSAT
Symposium, and hopefully have a better chance to get through on AO-85 at
that time.
I have been asked why I am doing this - using different radios or
combinations of radios to work this satellite. Since we have not had a U/V
FM satellite since SO-35's demise in 2001 (a satellite I worked one time,
in 2000, using two HTs with long duckies), and not counting the ISS U/V
crossband repeater that was on in the mid- to late-2000s (its downlink was
much easier to hear than even AO-85), this is the first time we have been
able to actually test radios against an actual U/V FM satellite.
I attend lots of events around the southwestern USA representing AMSAT,
where I field questions from hams who are either thinking about satellite
operating, and others who may be coming back to this part of our hobby. I
also get e-mails from all over, with questions that I have enjoyed trying
to answer. If I'm able to disprove some incorrect statements that have been
floating around in relation to some of these radios, all the better! It is
better to have more options available for hams to work this satellite, not
fewer. Some of the traditional options for radios that work with SO-50 and
previous V/U FM satellites are not good options for AO-85 and future U/V FM
satellites. Not working SO-50 and other V/U FM satellites full-duplex may
be a viable option for those satellites, but it is a very poor option. Find
a second HT, or even an SDR receiver, if you are trying to set up a station
capable of working satellites - including AO-85 - full-duplex.
I could just use my IC-2820H mobile radio at 50W to log lots of stations on
every possible AO-85 pass I can work. I know this is a great radio for FM
satellites, whether working V/U or U/V. Where's the challenge in doing
that? And there's the SDR stuff that has been fun to use. Having the RF
recordings from HDSDR, which I can use to upload telemetry to AMSAT and
update my logbook, is a powerful tool to help improve my station and my
operating. An SDR receiver with a small tablet is a capable - and less
expensive - way to help build an all-mode satellite station that is capable
of full-duplex operation.
The two RF recordings I made from the AO-85 passes I worked, and other
photos and screengrabs, are now up in my Dropbox space at:
http://dropbox.wd9ewk.net/
(hit F5 until the folder/file listing appears in your browser window, if
it doesn't appear immediately)
My @xxxxxx Twitter feed usually has photos either before or after the AO-85
passes I work, along with other comments and observations I can put into
140-character chunks. This is readable in a browser window without having
to join Twitter, at https://twitter.com/WD9EWK
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @xxxxxx
------------------------------
Message: 10
Date: Mon, 12 Oct 2015 23:24:32 -0700
From: Bryan Green <bryan@xxxxx.xxx>
To: the2belo@xxx.xxxxxxx.xx.xx
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Arrow Antenna
Message-ID: <AF2241F8-803B-477F-82FB-C39D2678FD4A@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I really gotta get one of those ALASKAN Arrows.
-- bag
Bryan KL7CN/W6
On Oct 12, 2015, at 23:02, J. Boyd (JR2TTS) <the2belo@xxx.xxxxxxx.xx.xx>
wrote:
On Tue, 13 Oct 2015 01:23:27 -0400, "W3MAT ." <w3mat03@xxxxx.xxx> wrote:
> Has anyone removed the duplexer and its coax and replaced it with one coax
> cable to VHF, and one coax cable to UHF for two radio operation? If so,
> did you notice any improvement and what would the power rating be now
> without the duplexer?
I have done this for all SO-50 passes because I want to hear my own
downlink (and record the results with a voice recorder from the downlink
HT earphone out) but I didn't notice any discernible difference without
the duplexer because I'm only running 5W. (Antenna is handheld.)
Arrow Antennas states that max power for the Alaskan Arrow (the type I
own) without the duplexer on a tripod is 150W. (See FAQ at
http://www.arrowantennas.com/arrowii/alaskanarrow.html)
--
J. Boyd, JR2TTS/NI3B
the2belo@xxx.xxxxxxx.xx.xx
http://www.flickr.com/photos/the2belo/
http://www.qrz.com/db/JR2TTS
Twitter: @xxxxxxxx
------------------------------
Message: 11
Date: Tue, 13 Oct 2015 15:32:45 +0900
From: "J. Boyd (JR2TTS)" <the2belo@xxx.xxxxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Arrow Antenna
Message-ID: <20151013152652.AB3D.THE2BELO@xxx.xxxxxxx.xx.xx>
Content-Type: text/plain; charset="UTF-8"
On Mon, 12 Oct 2015 23:24:32 -0700, Bryan Green <bryan@xxxxx.xxx> wrote:
> I really gotta get one of those ALASKAN Arrows.
Pros: Having those extra elements makes it so much easier to lock onto a
bird and reach it with less power.
Cons: It weighs as much as a baseball bat. Holding one of those things
up in the air for fourteen minutes and your arms will look like Popeye
the Sailor Man at LOS. You're going to need a tripod, or at least a
camera monopod to brace it against the ground.
--
J. Boyd, JR2TTS/NI3B
the2belo@xxx.xxxxxxx.xx.xx
http://www.flickr.com/photos/the2belo/
http://www.qrz.com/db/JR2TTS
Twitter: @xxxxxxxx
------------------------------
Message: 12
Date: Tue, 13 Oct 2015 07:54:21 -0400
From: "Steve Kristoff" <skristof@xxxxxxx.xxx>
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Arrow Antenna
Message-ID: <7520A5095EBE4DAEA848DCAA941D0D7D@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I ordered my Arrow Antenna without the duplexer, so I've always used it with
two separate coaxes and two radios. I use a simple digital recorder to
record the QSOs. My experience, so far, is limited to SO-50, but the set-up
works just fine for that satellite.
Steve AI9IN
----- Original Message -----
From: "W3MAT ." <w3mat03@xxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Sent: Tuesday, October 13, 2015 1:23 AM
Subject: [amsat-bb] Arrow Antenna
> Has anyone removed the duplexer and its coax and replaced it with one coax
> cable to VHF, and one coax cable to UHF for two radio operation? If so,
> did you notice any improvement and what would the power rating be now
> without the duplexer?
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
>
------------------------------
Message: 13
Date: Tue, 13 Oct 2015 09:13:36 -0400
From: Mvivona <Mvivona@xxxxx.xxx>
To: Steve Kristoff <skristof@xxxxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Arrow Antenna
Message-ID: <8F479C23-B8F5-4984-84D9-684A51FC2FEC@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
My experience with the duplexer is:
I looked at my Arrow on my antenna analyzer without the duplexer. After some
tuning I got a pretty good dip at 146 and 436 MHz.
With the duplexer attached the tuning went way off. I tried, but couldn't
even get it close with it installed.
I use mine with my ICom 910. One coax per band. The antenna is on a sturdy
camera tripod with two Arrow dualband yagis. I have each antenna connected
to a small BNC coax switch so I can remotely switch polarization as needed.
At the antenna there is a preamp for each band with power for the preamps
being fed through the coax.
For a rotor I simply use a large RC robot style geared servo for AZ being
that this is just a temporary out the back door setup. For EL I just walk
out and set the EL on the tripod before the bird comes over.
With this setup I usually use about 5 to 10 watts on VHF depending on the
bird and elevation. On UHF I sometimes need a little more power due to the
attenuation in the coax which is about 50 ft long.
Michael KC4ZVA
Sent from my iPad
On Oct 13, 2015, at 7:54 AM, Steve Kristoff <skristof@xxxxxxx.xxx> wrote:
I ordered my Arrow Antenna without the duplexer, so I've always used it with
two separate coaxes and two radios. I use a simple digital recorder to
record the QSOs. My experience, so far, is limited to SO-50, but the set-up
works just fine for that satellite.
Steve AI9IN
----- Original Message ----- From: "W3MAT ." <w3mat03@xxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Sent: Tuesday, October 13, 2015 1:23 AM
Subject: [amsat-bb] Arrow Antenna
> Has anyone removed the duplexer and its coax and replaced it with one coax
> cable to VHF, and one coax cable to UHF for two radio operation? If so,
> did you notice any improvement and what would the power rating be now
> without the duplexer?
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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@xxxxx.xxx. 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
------------------------------
Message: 14
Date: Tue, 13 Oct 2015 12:01:10 -0400
From: b <rrdd3939@xxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] LEARNING & POSSIBLE MEMBERSHIP
Message-ID: <15061ef15cf-1db1-41fe@xxxxxxxxxx.xxxx.xxx.xxx>
Content-Type: text/plain; charset=utf-8
Please send me information concerning amateur satellite monitoring at the
simplest
level as I am new to the field.
I intend to purchase Boefeng uv n-srt as that is all that I can afford at
this time.
As I am disabled and homebound, I am confident that the microwave signals can
reach me.
Thank you, Rick (Richard DePersio)
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
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 member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 10, Issue 310
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