[amsat-bb] Re: PIC rotator control

On Thu, 22 Oct 2009 10:09:22 am Gordon JC Pearce wrote: I've ditched all my PIC stuff and now use AVR, which is extremely well supported on Windows, Mac OS and Linux. It's a better product, the CPU core is generally faster clock-for-clock and it's only slightly more expensive. How much

[amsat-bb] Re: PIC sat tracker

Andrew, If you're looking for recommendations, I'd pick #3. It keeps the control of the motors in the same place that does the measurement of where the antennas currently are. The tighter that loop is the more accurate will be your positioning, and the more tolerant it will be of interface

[amsat-bb] FAO Steven Bienvenu, wasRe: Re: PIC rotator control

Hi Steve, I replied to your email only to have Comcast reject it as spam with no way of unblocking it. Have you got an email with a non-broken provider I could forward it to? Gordon MM0YEQ ___ Sent via amsat...@amsat.org. Opinions expressed are

[amsat-bb] Putting the ISS together in sequences

Interesting concept: http://i.usatoday.net/tech/graphics/iss_timeline/flash.htm ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription

[amsat-bb] HRD satellite tracker + 2 radios

I wonder if anyone has had any luck doing this. I have a ft-100 and 706mkIIG for radios. HRD will talk to each radio. I cannot get the second radio recognized by the program. would like to tune downlink with one radio and the uplink with the other radio using one instance of the HRD program.

[amsat-bb] Re: New AO-51 Whole Orbit Data decoder released by DK3WN

On 22 Oct 2009 at 11:39, Mark L. Hammond wrote: Date sent: Thu, 22 Oct 2009 11:39:08 -0400 From: Mark L. Hammond marklhamm...@gmail.com Subject:[amsat-bb] New AO-51 Whole Orbit Data decoder released by DK3WN To:

[amsat-bb] antenna question

Hi, Amsat-BB Are there any antenna designs that use predominantly rotating sub-reflectors and a reflector for tracking LEO birds, in contrast to rotating the main antenna structure on booms in the AZ-EL directions ? I am aware of multi-LNB antenna arrangements, thought it would be interesting to

[amsat-bb] Re: New AO-51 Whole Orbit Data decoder released by DK3WN

Hi Luc, TLMEcho is the program for LIVE decoding of AO-51 telemetry packets during a pass. Some telemetry channels are sent via 9600 baud packet at a regular interval, usually 10 seconds, and TLMEcho can decode these (using a 9600 baud modem) LIVE as they are coming down. The new WOD decoder is

[amsat-bb] Re: antenna question

While searching for public text concerning Amateur satellites and phased array antennas, I came across this gem from our very own Tom Clark, K3IO http://mysite.verizon.net/w3iwi/electronic_scanning_antennas.pdf, Electronic Scanning Antennas for Amateur Spacecraft. I wonder if this knowhow could be

[amsat-bb] Re: PIC rotator control

--- On Wed, 10/21/09, Gordon JC Pearce gordon...@gjcp.net wrote: The PIC microcontrollers are frankly *dreadful*, without a single redeeming feature.  What makes me like them even less is that you're forced to use the bloody awful Windows software to program them, I've used gpasm for

[amsat-bb] Re: PIC rotator control

I have used MPLAB and an imitation picstatrt programmer I use OLIMEX development boards and my role out is very quick I decided to use assembly because it made me think and understand how a PIC works These days I have a code bank and just copy and paste Cool hobby tho - Original Message

[amsat-bb] Re: antenna question

This is a great paper and solid work. It doesnt have a chance of being implemented on an amateur radio budget or time scale to the point where a solid reliable platform can be flown. What the satellite group needs is more Oscar 7's (or VO 52's) and Oscar 10...Arsene and Oscar IV were not

[amsat-bb] New items for sale at the AMSAT online store

Did you miss the symposium? Now available at the AMSAT online store -- a 40th Anniversary Tote as well as the Proceedings of the Symposium. Get yours while supplies last. 73...bruce Sent from my iPhone ___ Sent via amsat...@amsat.org. Opinions

[amsat-bb] Re: Arrow 10W Duplexer Performance Measurements

I've always wanted to build a preamp that incorporated some helical filters (resonators), just haven't gotten around to it. It should be possible to build a small one to do just what you want. 73, Joe kk0sd -Original Message- From: amsat-bb-boun...@amsat.org

[amsat-bb] EN04 possable activation

i know that this is short notice, but i will be going to Huron,SD (EN04) this Saturday if things work out, it may also be possible that i will do a grid boundary EN04/EN14 if conditions permit,   all operations will be on a, if time permits and will be after noon/evening passes FM SAT's i wish i

[amsat-bb] Re: antenna question

Samudra, You could use a polar mount and preset mast angle and azmuth before each pass. That will give you a single axis control. Most antennas are moer that 30 degrees in beamwidth, the system only needs to be close +/- 15 degrees to have max signal. Art, KC6UQH -Original Message- From: