Does the use of a CAT cable and Ham Radio Deluxe allow me to tune the vfo
with
Better resolution than the current 10Hz? That's what I currently get with
the
Dial set to FINE . Ordered the cable and programming software, but was
curious.
I like doing the FMT's and would like to have more resolution ..
Randy - N2CUA
I have relisted my 910H for sale on Ebay ; it has the 1.2 gHz module
installed along with two (2) DSP modules and includes two (2) pre-amps for
mast mounting. The Ebay listing number is 130333300500.
73's Gordon, NW7D
Great stuff, Mark. I'm an old, dusty assembler, and later a C programmer. Used to program for fun,
then for profit, then after a few years of life I looked around and the art had snuck ahead of me.
I used to hack up the PREDICT code for my own devious purposes, and just to have fun
with the source.
Your blog post reminded me of how fun it is to cobble together one's own code to
solve a particular problem. Keep it up!
Rich, N8UX
Mark wrote:
>You can find some of the simple example code at my blog:
>
>http://brainwagon.org/2009/09/27/how-to-use-python-to-predict-satellite-loc…
>
>I'll probably be porting all of my existing scripts to use this soon.
> In the mean time, if you have a similar task, you might look to it to
>solve your custom satellite prediction problems.
>
>73 Mark K6HX
>_______________________________________________
When posting to AMSAT-BB, the high lighting and underlining must have been stripped.
Here is what I high lighted and underlined.
1. FO-29 is in the "high shade rate period" now.
2. "high shade rate" and by the rise of the internal
resistance of the deterioration of the battery and by the influence of
the temperature of the battery.
3.it is designed to turn on a transmitter automatically.
However malfunction occurred for this function in 2007.
4. The transponder has been worked without control command from control station from summer of 2008.
5. ***From this , We decided that we make the operation schedule plan, and
manage the limit of the operative number of times in one day like last
time to keep the electricity income and expenditure untill improve the
"shade rate" which is in January, 2010.
6. The transmitter becomes OFF by UVC automatically in the eclipse.
All the best,
Mike (K9QHO)
hi all, the kpc9612 will not do 300 baud on one port and 1200 on the other.
what were they thinking when they made this. geee.
all along thought it did.
kc8gkf
Hi Folks,
sorry for the OT message.
I am looking for the displays Blubs lamps and the sitting rubbers
For my Kenwood TS-790E RTX.
Anybody can point me where to find them?
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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*** 2nd e-mail: vimone(a)tin.it ***
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On Sun, Sep 27, 2009 at 7:14 AM, Gordon JC Pearce <gordonjcp(a)gjcp.net> wrote:
> On Fri, 2009-09-25 at 22:19 -0400, Robert Bruninga wrote:
>> >> At a SmallSat conference... this summer,
>> >> I was amused at the casual assumption by
>> >> a researcher that 50, cubesats could be
>> >> launched as part of an upper atmosphere
>> >> project using ham frequencies for the
>> >> downlinks.
>>
>> And wouldn’t it be a hoot if everyone of them could put their
>> RX/TX into a bent-pipe packet mode, and then we would have
>> amateur radio global hand-held text messaging satellite
>> system...
>>
>> >> (They would have a lifetime of only 3-4 months.)
>>
>> But it would be FUN for a while!
>>
>> Using some of the 2-way very small micro APRS packet systems, a
>> 2 to 5 Watt transponder will easily fit on a singl circuit card
>> in a small cubesat. See www.aprs.org/cubesat-comms.html
>>
>> Bob, WB4APR
>
> If you could have maybe five or six cubesats with an FM transponder
> orbiting in such a way that there was a good 15-minute pass every hour,
> then I suspect that would work wonders for getting people interested in
> satellites again. The technical requirements for getting into them
> would be low enough for "entry-level" amateurs all over the world to
> have a crack at them - dual-band HT and a homebrew Arrow clone, and
> you're good to go. Cheap, simple satellites, and cheap, simple ground
> stations. How many could you fly for the cost of one HEO sat and
> launch?
>
> Gordon MM0YEQ
>
In a recent conversation on this list, I did the math and
conservatively estimated that 125 1U cubesats could be launched for
the current quoted price of a HEO launch alone.
The more I think about this digital cubesat constellation proposal,
the more I see its merits. Beyond the plain fact that it is
financially doable, as an emergency services platform it would be
genuinely useful, since even a low LEO will provide communication
outside the disaster zone in most cases, and compared to a HEO setup,
it would have the advantage of being usable for nearly every ham
anywhere.
The problem, as I think Bob has noted before, is momentum: a
constellation of these is very useful; one of them is much less so.
The group that puts up the first of them, then, is not doing much of
interest and hopes that others will follow to increase the 'network
effect'. For this reason, we cannot expect (most) university cubesat
missions to look merely like this, unless their institution has a
special interest in emergency communications, as Bob's uniquely is.
Perhaps we could turn the tables and offer university groups a small
amount of space in the cube for an experiment in exchange for
defraying the launch cost. Those universities that are especially
interested in the natural science side might jump at this, and doubly
so if they knew that they'd have an international APRS network
collecting their data. We could play the role of IntelSat for a change
:-)
KD6OZH's mentioning of a 1200 bps voice codec is very interesting,
too. I see that DSTAR's AMBE is down to 2000 with error correction,
and Speex operates down to 2000, too, though I think without error
correction. (I find the latter much more engaging as a ham, since it
is open source.) It would be a hoot to do a voice conference over the
Internet using a sample of low bitrate codecs and just get a sense of
what might be possible. One downside of voice is that it would occupy
the transponder far more than messaging, and Bob's favorable power
calculations would need to be estimated downwards.
I guess another aspect of the cubesat approach is that the cost of
failure is much lower. If a low bitrate audio codec doesn't really
work well, it would be a less expensive enterprise and easier to chalk
up to experience.
73, Bruce
VE9QRP
In a message dated 9/28/2009 7:47:44 AM Central Daylight Time,
ka3hdo(a)comcast.net writes:
> Subj: [amsat-bb] Symposium Restaurant Locations
> Date:9/28/2009 7:47:44 AM Central Daylight Time
> From:[email protected]
> To:[email protected]
> Received from Internet:
>
>
>
> All,
>
> I had to go on some unexpected travel out of BWI the past couple of weeks.
> So I did some reconnaissance and developed a couple of maps that depict
> restaurants near the hotel and airport. You can retrieve these at the
> AMSAT
> Symposium Web Site. Go to the food and drink icon and click on the pdf or
> ppt file.
>
> I also included in this package directions to the G&M Restaurant which is
> close to the hotel. This restaurant just received the WTOP "Best Crab
> Cake"
> award through a survey from the radio station's Baltimore/Washington
> listeners. This restaurant has good food at reasonable prices.
>
> We will be including paper copies of these maps in the symposium
> registration packet. But wanted to give you a heads up, so you can plan
> out
> your meals.
>
> And if you haven't registered for the symposium yet, please do so. We are
> less than 2 weeks away!!
>
> 73, Frank, KA3HDO
> _______________________________________________
> Sent via AMSAT-BB(a)amsat.org. 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
>
Thank's for reminding me about G&M's. This is the place that we frequently
sent out to for Subs at all hours when working late at Westinghouse - BWI
in the 70s and 80s. We nicknamed it "Grease and Mayonaise" but it was
excellent. The last time I ate there it had expanded into a very good full
service restaurant, but still retined the Sub Shop as well. I hope the Sunset
Restaurant in Glen Burnie made the list.
http://www.sunsetrestaurant.com/
73 - Keith, W5IU
For those who would like to keep up with what is happening see the following:
http://sumbandilamission.blogspot.com/
Regards
ZS1PK/M0PAK
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