[amsat-bb] Re: EM90-91-92-93 Operation
n3tl at bellsouth.net
Wed Apr 8 12:37:09 PDT 2009
Thanks for posting this.
I remain convinced that the major reason for the "performance" differences between AO-27 and SO-50 is the difference in output power between the two.
SO-50 transmits a quarter-watt (250 mW) into a 0-gain quarter wave vertical mounted on one corner of the satellite. AO-27 has a similar antenna setup, based on what I've read, but it transmits a half-watt (500 mW) into its quarter-wave vertical. That power level is consistent with the nominal power we get on AO-51. Drew and/or Gould will correct that last statement if I'm wrong, but I believe AO-51 routinely transmits around 500 mW when it's in V/U mode using the 145.920/435.300 pair.
Anyone who wants to try AO-27 also should visit the AO-27 site (www.ao27.org) and bookmark the page you get to from there that shows the activation schedule for the satellite. We get a 7-minute window here in North America on each pass, and the AO-27 TOPR page shows the times of activation.
73 to all,
Tim - N3TL -------------- Original message from John Papay <john at papays.com>: --------------
> I was able to operate mobile and then portable from a few grids on
> the way back to Ohio from Florida on April 1st. If you worked me on
> AO-51 in EM92 or EM93, you should receive a card in the mail
> shortly. No return card is necessary. I used the Arrow antenna with
> my Kenwood mobile strapped around my neck and a small UPS battery for power.
> The EM92 operation took place at the MM47 Rest Area on I-95
> northbound in South Carolina. We had one person ask my XYL about the
> antenna etc.; they thought I might be tracking animals! At some
> point I was sending my grid as EM82 but I was really operating from
> EM92. Sorry for the confusion. I logged 12 stations including
> HI8LAM, WP4CNU and YV6BFE.
> The EM93 operation took place at the MM123 Rest Area on I-26
> westbound just south of Columbia, South Carolina. There were a lot
> of trees in the way at this stop and it was getting dark. I worked
> 11 stations from here.
> The operations from EM90 and EM91 were made on AO27 while driving on
> I-95 in north Florida and in East Georgia respectively. I was just
> using my Larsen dual band antenna on the trunk lid but at a certain
> time during the pass, stations were loud and clear. I worked 6
> stations in each of those grids. If you worked me in EM92 or EM93 you
> also got cards for these grids. If you only worked me in EM90 or 91
> and need the card, please email me and I'll put one in the mail to
> you. No return cards are necessary.
> As many of you know, I operated from Florida from January through
> March using a portable setup (Kenwood V7A, UPS battery and Arrow
> antenna) in EL96 and EL98. I also made a few contacts at the Stuart
> Florida Hamfest (EL97) on March 21st, demonstrating satellites for a
> few interested hams. In addition I operated through my home station
> in EN91 using a remote control setup over the internet. If you need
> cards for any Florida contacts, just email me and I'll send them to
> you. If you need cards for EN91, please send an SAE or SASE to my
> qrz.com address.
> Working grids on the satellites can be both challenging and
> rewarding. The ARRL VUCC award is the most prestigious VHF/UHF award
> on the planet. It's the DXCC of the VHF/UHF world. It requires
> paper QSL cards at the moment, however, the ARRL is working toward
> making LOTW compatible with VUCC/Grids. You can chase new grids from
> your home station and then work from a grid away from home and give
> others that new one they have been seeking. When you travel, think
> about taking your rig and a portable antenna. If you get the
> opportunity to operate from a rare grid, you will find it very
> rewarding. If you hear someone operating from a rare grid, work them
> and then give them the frequency; they might be there for only one
> pass and have made a big effort to operate from a remote
> location. There will be plenty of time to work the regulars when the
> satellite is not busy.
> We have a two week period coming up where AO51 will not be in a V/U
> FM mode. Why not try SO50 (use a PL tone of 67.0 Hz), and AO27
> during this time. You never know when a new grid might show up
> there. SO50 can be a little difficult since it is subject to deep
> fading, but it is very workable during most portions of the
> pass. AO27 has a very strong signal and is generally on when over
> the US. Check the schedule for AO27 on their webpage
> If you are reading the amsat-bb and happen to live in a rare grid,
> please try to get on now and then. Many of us will be very happy to
> work you. Hint: Delaware has not been heard from in a very long time!
> John K8YSE EN91
> k8yse at amsat.org
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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