At 11:04 AM 1/18/2010, Unknown wrote:
my bank doesn't really offer them any more. I don't have a credit card
either, because I don't need one. Every bank account I have ever had
(again, at least since I was 16) has had a debit card facility.
Moreover the design of the amsat.org payment gateway
At 08:16 PM 1/9/2010, Daniel F6CDZ wrote:
F real = F nom (1 + V/C)
V = relative speed of the sat on Km/s
C = light speed (300.000 Km/s)
Note that only the component of V that is towards or away from the
operator affects the frequency. For example, at TCA, the satellite
is
At 08:50 AM 1/9/2010, Trevor . wrote:
The graphs at http://www.qsl.net/vk3jed/doppler.html
show this well.
Use http://vkradio.com/doppler.html . :)
73 de VK3JED / VK3IRL
http://vkradio.com
___
Sent via amsat...@amsat.org. Opinions expressed are those
At 10:54 AM 12/20/2009, you wrote:
Will need to wait a little longer to try out this
new satellite over Australia.
Current two switch on times are AFTER the satellite
footprint has passed my location and that of main
population centres of Australia.
I also have to wait until the operators are
At 06:38 AM 12/4/2009, Jan-Albert Koekemoer wrote:
Hello
The (partial) schedule for SO-67 for the next couple of days are as follows:
Jan, did you get my email for VK/ZL?
73 de VK3JED / VK3IRL
http://vkradio.com
___
Sent via amsat...@amsat.org.
At 10:03 AM 12/3/2009, Andrew Glasbrenner wrote:
The commands were executed to reverse the magnet, and there did seem to
be a change in signal strength by the end of the pass. I'm particularly
interested in any signal reports from the Southern Hemisphere. Does
AO-51 sound stronger than normal?
At 05:06 PM 12/2/2009, Greg D. wrote:
Amen! We bring our 5 senses with us to our troubleshooting tasks,
and then ignore them to focus on the 6th sense (guesswork!). Use
all of them! (Well, maybe not taste...) Take a step back and watch
the lights and meters. Listen to the sequence of
At 06:23 PM 12/2/2009, Greg D. wrote:
Actually, I do that all the time!
You've never checked the state of a 9V battery with your tongue? ;)
I rest my case, and you were right, use all 5 senses. ;)
73 de VK3JED / VK3IRL
http://vkradio.com
___
Sent
At 07:08 PM 11/30/2009, Greg D. wrote:
I believe that automatic tuning of the downlink receiver will only
work with FM, as an output of the FM discriminator can be used to
give an error (difference) signal for tuning. I don't believe this
is possible with an arbitrary SSB signal. The only
At 11:17 PM 11/30/2009, Bob McGwier wrote:
p=hk where p is momentum, k is Planck's constant, and k is an integer.
So when a photon is captured or reflects/scatters, it transfers
momentum. This equation is used to determine how much momentum is being
transferred.
Without tacking (sailing
At 11:34 PM 11/23/2009, Jan-Albert Koekemoer wrote:
In an effort to make this as painless as possible, I would like to request
comments on the possible use of regional coordinators, which I believe worked
quite well for SO-35. Such coordinators would then be responsible for
setting up schedules
At 12:14 AM 11/13/2009, Tim - N3TL wrote:
Hey everyone,
During the 2045-2046 UTC portion of the AO-27 pass over the western
U.S. yesterday (11 November), Sawson (KG6NUB) and I completed a
two-way contact with handheld stations. Each of us transmitted 50mW
(.05-watt) out. Sawson used a Kenwood
At 01:45 AM 11/9/2009, Dave Marthouse wrote:
Just for fun I attempted to hear SO-67 on the 1416UTC pass this
morning. It was orbit 790 with a max elevation of 79 degrees. I
was using my TH-F6A with stock rubber duck antenna. A few minutes
into the pass out of the noise came the signal. For
At 06:00 AM 11/4/2009, Chris Bloy wrote:
Hi All,.
Sorry the Schedule was for the 1st November!
Hmm, my TARDIS is down, so won't be able to make those ;) . Got my
satellite gear back on the air after a long hiatus, so looking
forward to throwing a bit of RF at the FM birds. :)
Missed the
At 08:37 AM 10/27/2009, Samudra Haque wrote:
Yes, I usually take care to divide my correspondence amongst the
particular groups I am working with, and this is also the basis in
which I recently proposed moving to (a) moderated forum (such as
phpBB) or (b) sub-dividing the amsat-bb list into
At 09:31 AM 10/27/2009, Samudra Haque wrote:
With a forum, you can unclutter your mailbox, and also the forum
system can always tag messages according to a timeline/subject/thread
whatsoever, so if you are really busy (are we not all busy ... its a
hobby of course) then just wait to log on, and
At 03:53 AM 10/15/2009, Andrew Glasbrenner wrote:
Sanford, Fred wrote:
I hope that AMSAT NA does not use an 70cm uplink, because that
band is not available for transmitting in all areas of the US. I
live near Cape Cod, MA and 70cm is not available for transmitting
because of PAVE PAWS.
At 07:30 AM 10/14/2009, Samudra Haque wrote:
on a satellite QSO, is it traditional to say A, B, C instead of
Alfa Bravo Charlie for brevity when referring to call signs and grid
locators ?
That can backfire and waste time, due to people not understanding the
letters. For example, my callsign
At 07:53 AM 10/14/2009, David - KG4ZLB wrote:
Perhaps these could be translated into Spanish!
If anyone wants to translate them into any language, go right
ahead. Just make a note where the source for the translation came from.
73 de VK3JED / VK3IRL
http://vkradio.com
At 05:26 AM 10/13/2009, Eric Knaps, ON4HF wrote:
I like rule number 3. I hate it when somebody calls cq while you are in
the middle of a qso.
In my experience, this is often due to a station that can't hear the
downlink, but it's annoying in any case.
73 de VK3JED / VK3IRL
http://vkradio.com
At 09:34 AM 9/26/2009, James Craig wrote:
Good point. Not everybody is interested in monitoring the one way
downlinks on the majority of these more recent birds. Why is it that
there is no problem getting large numbers of these types of satellites
into orbit, yet good old fashioned two way linear
At 12:14 PM 9/17/2009, you wrote:
As per the Satellite Experimenter's Handbook 2nd edition:
Power output: 5 watts for RS10/11
Power output : 8 watts PEP for RS-12/13
Interesting, I had better results on RS10 than RS12/13. Was RS10's
uplink more sensitive?
73 de VK3JED / VK3IRL
At 12:36 PM 9/17/2009, you wrote:
RS10/11 was a wonderful bird, with a high orbit and relatively high
transponder power, it was very easy to work and the coverage was quite
wide. It was a perfect beginner's satellite and a lot of guys got
started in satellite operation with RS-10/11.
I loved
At 01:00 PM 9/17/2009, John W Lee wrote:
RS 10/11 worked out real good for me.
I was doing a lot of travelling in 1987-90,
and was able to make a lot of mobile QSO's
using an IC-230 (10 watts on CW) with one frequency
I used to run 10W SSB into a vertical on RS-10, and receive on a
random bit
At 01:11 PM 9/17/2009, James Duffey wrote:
Tony -
On Sep 16, 2009, at 8:42 PM, Tony Langdon wrote:
The prob with the modern SSB birds is the equipment is expensive for
thos of us who don't already have 70cm SSB in something we
own.
Used multimodes for 432 MHz and older 432 MHz transverters
At 07:24 AM 9/9/2009, Geert Jan de Groot wrote:
Background
In the Netherlands, 436-440 MHz is secondary to the amateur
and amateur sat service. The folk experimenting with D-star
on 70cms use a fairly large shift of 9.4 Mhz, resulting in
a typical setup of 430.400-430.600 in and 439.800-440.000
At 11:44 PM 9/4/2009, Robert Bruninga wrote:
Well... DUH If the reason the spacecraft crashed back to
defaults was because it was low on power, then the last thing
you want to do is QUADRUPLE the power budget by having the
recovery-defaults turn on double the number of receivers and
double
At 01:41 PM 8/10/2009, you wrote:
I'm crunching numbers right now, but just thought of something
ICBM's If we were to nuke RUSSIA or visa versa, while these yes do not
get to orbit, they do get to just shy of orbital velocity, and re enter
the atmosphere, did they have all these elaborate
At 03:50 AM 7/17/2009, Nigel Gunn G8IFF/W8IFF wrote:
I cut my teeth on Oscar 6 and 7, 2M UP, 10M DOWN, SSB.
For me, it was RS-10, where I had my first satellite contact in 1991.
:) Again, 2m up, 10m down SSB. My first FM contact was much later,
in 1999 on SO-35. I did try RS-12/13, but it
At 05:06 AM 7/6/2009, kd8...@aol.com wrote:
On the FM birds how come the split is V/U or U/V? Are there any V/V birds?
snip
I know there is a reason, so I am curious that is all!
Yes, there is a reason. V/V would make the satellite work much like
a terrestrial repeater. Terrestrial
At 11:13 PM 7/4/2009, Jeff Davis wrote:
What about other orbits that may not be as desirable as HEO but that offer
better coverage than low-earth?
I recall reading something from G0RMF about adapting a CubeSat to include
some sort of a propulsion system to get to a mid-Earth orbit:
This idea
At 02:52 AM 7/5/2009, you wrote:
AMSAT as a whole (I mean the membership) needs a new challenge and dream
that will bring out the very best in it to build what ever comes up. The
Moon could be that new challenge as we have NEVER designed anything that
would actually LAND and operate in that
At 02:30 AM 7/3/2009, James French wrote:
Why not use a L/s, U/L. or a U/s transponder for this?
Why limit ourselves to V/u for everything?
Aren't we supposed to 'experiment' with the higher frequencies we have
allocated?
I agree. I believe the Moon is a job for the microwave
bands. Antenna
At 03:17 AM 7/3/2009, MM wrote:
Hi James:
I am in favor of any band that has the desired results. I just used
the 2/440 bands as the opener. Remember the higher in frequency the
less affordable the system becomes and the fewer Amateur Radio
operators and Short Wave listeners will have
At 11:03 AM 6/11/2009, Mark Lunday wrote:
Actually, a better approach might be to answer the question and also include
a reference to the location. The asker then sees a way to look that he or
she may not know. Also avoids making incorrect assumptions. I see this
method used a lot on technical
At 02:00 AM 5/4/2009, David - KG4ZLB wrote:
From Auntie (or the BBC for anyone not from England!)
http://news.bbc.co.uk/2/hi/science/nature/8029899.stm
Hehe, that could get confusing for us, as we call our ABC (Aussie
equivalent of the BBC) Auntie. :)
73 de VK3JED / VK3IRL
http://vkradio.com
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