I wanted to clarify some statements made by Miles, based on where ARISS was
when I stepped down.
In his e-mail he states:
We have two SSTV systems on ISS. One is the Kenwood VCH1 sstv microphone.
This is the system which th4 crew has been using the most. The system only
runs on AA batteries at this time due to flight safety limitations.
The second system is the Marex Software system called SpaceCam1. This
system will run manually for fully automatic. The software system has not
been used much because of a problem with the VOX cable that goes to the D700
transceiver. When the Vox cable is used the radio sticks in the
Transmitting mode until 3-minute watchdog timer expires. ARISS has tried
two different cables with the same results. The Vox gets its power from the
D700 and it appears the dc power has too much RF and is causing Vox circuit
to keep the radio stuck transmitting.
Marex is proposing a completely different VOC using that has been tested
The ARISS-provided VC-H1 currently does run on AA batteries. The use of AA
batteries was not due to flight safety limitations at all. Given the tight
schedule that we had for Richard Garriott's flight and the need to fly a
hardware-based SSTV system, we concentrated on certifying the VC-H1 with the
understanding that there was a surplus of AA batteries on ISS. On ISS,
batteries for critical functions are taken out of service and replaced
before they are fully used up. These partially-used batteries can easily be
used for non-critical devices like the VC-H1. The ARISS team is working on a
battery eliminator (power supply) for the VC-H1 that will be flown at a
There are 3 SSTV systems on board, one hardware system (VC-H1) and two
software-based systems, MMSSTV and SpaceCam. The primary rationale for
making the VC-H1 prime is that the ARISS team gets very limited use (read
as: almost no use) of an on-board computer. So the SSTV operations over the
past few years was nearly zero. Only when the VC-H1 was introduced in
October 2008 did SSTV on ISS really take off. Some self-interference issues
have been observed on the software-based system that were not observed on
the ground prior to flight. As of right now, it is unclear what is causing
this issue. The ARISS team has not had an opportunity to fully debug this
issue on-orbit. (It is very hard to get a computer and the crew time at the
same time) So I would not speculate what the issue is. Also, there are
some subtle differences in the radio system on-board ISS as compared to the
Any proposals for new amateur radio hardware and software systems need to be
approved by the ARISS project selection and use committee. They then need
to be presented to the space agencies. The space agencies then determine if
there is volume/power/mass available on-board for the system and give the
ARISS team a yes/no answer as to whether they are willing to fly the
equipment. The proposal then needs to get a final concurence from the ARISS
international delegates to move forward as an official project.
Miles' proposal (above) has not gone through that process yet.
I hope this clarifies.
73, Frank Bauer, KA3HDO
The AMSAT block for rooms at Dayton is now filled. Don't forget to register
for the AMSAT-TAPR dinner Friday night. All the information is on the AMSAT
website. Look on the left-hand side and click the box that says Dayton
Fellow AMSAT operators,
I will wrapping up my stay in Little Cayman. I am heading back tomorrow to Grand Cayman EK99kh until April 8th.
I hope to be on following last passes today and tomorrow morning before flying out.
If there is any interest in FO-29 and VU-52. Please let me know via email I can try to get on before 10PM CDT tonight. There have been only a handful of operators on those birds and it takes considerable time to set up all the gear and laptop.
All times are UTC for my location in ZF:
SO-504/2/2009 20:09:36 20:22:46
SO-504/2/2009 21:51:02 22:02:10
AO-514/2/2009 22:52:49 23:06:14
AO-514/3/2009 00:32:45 00:43:56
Friday: AO-514/3/2009 11:11:13 11:25:57
Hope to see some western USA operators on this afternoon on the SO-50 pass.
See you on the birds!
After some delay, I have printed and started sending out QSL cards
for all of my recent demonstrations and presentations:
17-23 February 2009: Yuma AZ hamfest, XE2/WD9EWK from Baja
California, and assorted stops in DM22 and DM32 around
14 March 2009: Scottsdale AZ hamfest
20 March 2009: ThunderBird Amateur Radio Club (Glendale AZ) demo
21-22 March 2009: day-trip to DM35/DM45 in northern Arizona
I spent a little more time designing QSLs for two of the locations
I operated from in Mexicali (Baja California) in February, and
needed time to get all the cards printed. Anyone who sent me a QSL
for any of these events will have an envelope going to the post
office tomorrow, and more cards will go out over the next few days.
Again, if anyone worked me during any of these events and wants to
receive a QSL card, please send me an e-mail directly with the QSO
details. If you're in the log, you'll get a card. For some QSOs,
I may include an SASE so I can get your QSL card - I'm starting
to work toward a VUCC from Baja California.
If you are going to make a new bracket, I suggest you do not make the
I heard that these broke easily and were replaced by a "U" bracket.
I have a "U" bracket that came with my Yaesu g 5400 rotor.
You can see a picture of this in the Yaesu 5500 rotor manual that you
can download from the yaesu website.
I have measured mine and have these measurements
length =4 3/4 inches
width = 4 1/4 inches
Vertical ends are 2 3/8 inches high
Holes are 1/2 and 3/4 inches in from the ends of the plate. (you will
have to mark these with your rotor to be sure).
Holes are 3/4 inch in diameter.
There is also rubber inserts/spacers in the mounting holes.
Slot in the middle of the bracket is 3 inches x 3/4 inches centered in
the middle of the plate.
It may be easier to just order one from your local amateur radio store
My manuals for the 5400 and 5500 do not give part numbers.
Hope this helps
I could give you measurements for the L-bracket on a Kenpro G-5500A
rotator if you like ,
and if nobody else has better information. I dont know if the A and B
versions are the same or not.
> Hi Folks,
> sorry for the OT message.
> I own the rotator Yaesu G-5400B which are a Azimuth and elevation rotators.
> I had enclosed with the pack when I bought it an "L" bracket.
> Unfortunately due to maintenance I have lost the Bracket.
> Please is there anybody which own one and can pass me all the measures
> So I can build a new one? I need the measures of the "L" bracket and the
> Positions of the holes to fix the two rotators.
> Any help will be really appreciated.
> Thanks in advance
> 73 de Enzo IK8OZV
> EasyLog 5 BetaTester
> EasyLog PDA BetaTester
> WinBollet BetaTester
> D.C.I. CheckPoint Regione Campania
> Skype: ik8ozv8520
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> Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author.
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Hello all on the board. Its time for our 66 edition of the Hudson Valley
Satcom group Net tonight at 8 PM EST. The Echolink node is n2eyh-l. This is only
our second net using Echolink so bear with us until we get the bugs out. Please
join us and share your satellite knowledge with us. Hope to hear toy there.
**************Feeling the pinch at the grocery store? Make dinner for $10 or
Hello to everyone!
I am searching for two Motorola MRF 309 power transistors available at decent price.My amplifier built on the EB-67 bulletin (432 mHz)just passed away .I found a source for those transitors but they were selling for the price of a complete used amplifier!
Thanks in advance and 73s to all.
I received this email from Tore and can not answer it. He gave me
permission to post it on the bulletin board. If someone can help him,
please respond to his personal email.
---------- Forwarded message ----------
From: AMSAT Website <www(a)amsat.org>
Date: Mon, Mar 30, 2009 at 3:57 PM
Subject: Information Request
This message originated from the AMSAT website
Sender: Tore Jönsson Email: sm0ori(a)swipnet.se
Subject: Information Request
Is Digital Disk with WISP32 Software a WISP that is tested on VISTA?
(end of message)
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