[amsat-bb] Re: AO 73
n8hm at arrl.net
Sun Jan 19 10:56:58 PST 2014
I decoded 19 frames of telemetry while sitting inside a house with an
Icom IC-R10 (manually tuning for Doppler) and a MFJ half-wave whip. A
simple audio cable ran from the Icom IC-R10 to a Dell Venue 8 Pro
tablet (an 8" tablet running full Windows 8.1). It is quite easy to
On Sat, Jan 18, 2014 at 11:50 AM, Burns Fisher <burns at fisher.cc> wrote:
> Hi Rich,
> The minimum equipment to receive is pretty small. I think it depends in
> detail on what you want to do. The signal is nice and strong in the
> daytime when you would be doing school experiments. When Funcube is in
> sun, it turns off the ham transponder and uses all it's downlink power on
> the telemetry beacon.
> To give you an idea of what you need, I have been able to hear AO73 on an
> HT with rubber ducky. I have not tried to decode anything that way, and I
> would not necessarily recommend that, but it IS easy to receive. For my
> telemetry station, I am using a Funcube Dongle Pro Plus (I also used and
> older Pro non-Plus), a M3 Eggbeater 2M antenna and a preamp out at the
> antenna. The antenna is not well placed. It maybe 6 feet above the ground
> between my house and the woods, but with a clearish view to the southeast.
> I am generally able to get dozens of packets per daytime pass depending on
> the azimuth and altitude of the pass. At night when the beacon power is a
> lot lower, I am more likely to get a few packets up to a couple dozen,
> again depending on the azimuth and altitude. I can generally receive
> successfully on 2 or three passes in the morning and 1 or 2 passes in the
> evening. Obviously, you can get more with a beam of some sort, and the act
> of pointing is itself interesting science.
> Burns W2BFJ
> On Sat, Jan 18, 2014 at 8:50 AM, Rich/wa4bue <richard.siff at verizon.net>wrote:
>> Hi All
>> Just getting back to A0 73. Found AO 73 in the CELTEX file, that was
>> great. Is the data signal stable as compared to the transponder? If not
>> what is the technique for tracking the drift? I would like to try to
>> implement at school by April. With a little luck we will have the upgraded
>> Portable SATCOM running next week. Once it is up I will try to get some IT
>> guys setting up the dash board.
>> Also what is the minimal antenna to copy AO 73? We have picked up a
>> second school and looking at a 3rd one maybe next year,
>> Your answers will be a great help.
>> God Bless
>> Rich W4BUE
>> W4FOS HS Radio Club
>> ----- Original Message ----- From: "M5AKA" <m5aka at yahoo.co.uk>
>> To: "AMSAT BB" <amsat-bb at amsat.org>
>> Sent: Saturday, January 18, 2014 6:37 AM
>> Subject: [amsat-bb] New Guide Promotes FUNcube-1's Educational Value
>> ARRL Education & Technology Program (ETP) Director Mark Spencer, WA8SME
>>> has developed a new FUNcube guide, see
>>> 73 Trevor M5AKA
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