[amsat-bb] Re: Uplink power for working ARISSat-1?
John, I hear my signal back very well with an 18 el crossyagi and 40 W TRX output. However so far nobody came back to CQ. I think your setup should work. Try CW. How about a sked tomorrow for the passes around 10:07 and/or 11:42? Cheers Edgar DF2MZ Am 12.11.2011 21:44, schrieb John Heath: Hi, Thought I would give the ARISSat transponder a try. Any recomendations from those that have worked it. I have available a 9 element yagi and about 20W at the feed point Is this likely to work or do I need a few kW ? Thanks John G7HIA ___ Sent via AMSAT-BB@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 ___ Sent via AMSAT-BB@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
[amsat-bb] Re: Uplink power for working ARISSat-1?
Hi John, With the antenna that you have I am sure that you should have no problem hearing your own downlink and maybe getting someone to respond to your calls. I had confirmed contacts earlier in the season when ARRISat-1 was first making passes and active during daylight hours here in the UK. My set up is just an Elk antenna mounted on a well made tripod, I put together a unit with a motor for rotation and tracking via any of the usual forms of software available - Mainly use SatPC-32. I have tried my Kenwood TS2000 or FT 736 and also an FT857 ( this does not have duplex operation) In terms of power which was your main question - I am using around 20 watts from the transmitter on UHF for the uplink on SSB. This is also my set up for many other contacts and operation and also use a Kenwood THD 7 for AO-51. During the past week while ARRIS -1 has once again been in good favour for daylight hours I have made regular CQ calls and heard my own downlink but sadly had no response from anyone. The very short time that you get of course with the satellite switching off makes it harder to get into the bird I listen for the rapid rise in the level of noise generated then use CW to look for my downlink ( around 145.290 Mhz)The signal level varies around S5 -S6 at best. Need to make the most of the current favourable conditions for this part of the world as with shorter hours of daylight and with regression it won't be long before loose operation for a spell. I wish you luck and look forward to hopefully hearing you active so that I can get another confirmed contact in my log. Congratulations to you on your success with the decoding of the BPSK - Maybe I should also be looking at following in your footsteps. Regards Ken Eaton GW1FKY ___ Sent via AMSAT-BB@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
