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AO-40 QRV report on orbit#248 from Japan.



Hello This is Yoshi.

  This is the report of AO-40 QRV on orbit#248 during 13:03z - 20:16
of May-15th. 2001.
  It was a good pass for us that the NA and Peru was inside of footprint,
but the local time of them were morning of weekday so I could not hear
so many signals.

1. Equipments
    (1) MAKI 29ele LOOP YAGI + 0.8dB LNA + Basic Modified 2880
          -> 10dB ATT -> FT-817 for beacon decording.
          -> IC-821 for communication.
    (2) TDK 45cm Dish & 2.5turn LHCP Helix (prototype-2) + 0.3dB LNA
        + ERA-3 repaired 2880. Connected to IC-821 at partly.
    (3) U-uplink by IC-821 (5-20W) with 25deg. fixed elv. 6ele YAGI.

2. QRV Documents

 UTC   MA  Dist(km) Events
 ----- --- -------  ----------------------------------------------------
 13:03 151 63,570  AOS time but could not hear any. AO-40 was at behind
                   of neighbors house.
 13:20 155 62,750  Found S2-MB weak signal. Could not hear S1-MB.
 13:25 156 62,500  Tried U-Uplink just 40cm beside of S-band antenna.
                   (1) No problem. (2) Blocked totaly! :-< mnaybe the
                   element of Helix feed had resonant with 435MHz....
 13:33 157 62,070  Gaaaa! My Win98 PC hunged up!! x-o
 13:43 160 61,500  PC restarted.
 13:49 161 61,170  Found SSB CQ of W8YIo on 2401.389.
 13:53 162 60,940  Loop test on 2401.440 but too weak!
 13:55 162 60,810  Noticed by telemetry that the schedule of Xpond had
                   changed. Also it said that the U-AGC is about 10dB.
                   Umm.... hard day...

    A  HI, THIS IS AMSAT OSCAR-40       2001-05-15  13:55:12  #0171 
    +--------------------------------------------------------------+
    | ALON/ALAT=6/2; EXPERIMENTAL U/L1->S2, MA 70-210;  AVOID MB!  |
    +--------------------------------------------------------------+

 13:59 163 60,580  Heard a siren-sound on 2401.366. Is that fron LEILA?
                   I could not hear any signal for target.
 14:01 164 60,430  Heard a siren on 2401.365.
 14:04 164 60,250  Heard a SSB QSO between W8YIO-JH1NPQ on 2401.366. RS
                   =41.
 14:06 165 60,130  Loop test on 2401.420 with 10W cw, then warned from
                   LEILA!. Tried again with 5W (retrn was too weak) but
                   warned again! Why! Is my less than 50W EIRP too strong?
 14:09 166 59,940  I tried to continue loop sending even the LEILA warned
                   me, but my signal had not notched. Is LEILA working 
                   well? I did not feel so.
 14:11 166 59,810  Found a CW QSO on 2401.363 between JA0BBW-JH1AOY. U-AGC
                   was about 6〜8dB.
 14:24 169 58,920  Found a CW QSO on 2401.365 between JA3THL-NQ2O.
 14:25 169 58,860  Called NQ2O and QSO with 519-559. He was my first NA
                   station!.
 14:35 171 58,150  Found a SSTV signal on 2401.382. But weak. Also I heard
                   LEILA's siren about 5 or 6 times at any freq. of
                   downlink. But I never heard any target strong signals.
 14:38 172 57,940  Found CW CQ of JH1NPQ on 2401.358, and QSO with him
                   by 519-519.
 14:54 176 56,750  Found a signal on 2401.366 as "KK5DO TESTING TRYING TO
                   SET OFF LEILA BT.."... repeating. RST=529.
 15:00 177 56,250  Loop test on 2401.420. RST=519-529 without LEILA's
                   warning.
 15:06 179 55,760  Found a SSB signal on 2401.385. I heard his callsign
                   JH2ESW but not sure.
 15:08 179 55,630  Tried to loop by SSB on 2401.410, but could not copy
                   my voice.
 15:22 182 54,460  Found a CW CQ of JA1BLC on 2401.360.
 15:33 185 53,510  Found a SSB QSO between WL7BQM-KO6RS on 2401.366.
 15:40 186 52,900  Compared system (1) and (2) with S2-MB. (1) was 1-3dB
                   better than (2).
 15:50 188 51,900  QRT. Directed antenna to the posision of 1 hour later,
                   then went to bed with AO40RCV running.
 17:01 205 44,240  Got the last CRCC block. (from LOG)
 18:01 218 36,200  Got the last telemetry block. (from LOG).
 20:16 249 11,600  LOS (might be.)
 20:50             Woke up! x-O ...
 - - - -

  Finally I got only 460 CRCC OK blocks of total 1038.

3. Misc.

  I had worked with stations of AS(JA), OC(ZL), EU(I) and NA(W) til now
by AO-40 testing operation. So I will loon for the station from AF and
SA then... :-) (Is there?) Hi.
  My 2.5turn Helix was not good with using U-up. I will try again with
a simple dipole feed at next chance.

  And this pass, I heard many times of LEILA's siren at anyware, but I
never heard the target strong signals. Is she working well? or the strong
signals had notched out already wen the siren warned? But my signals had
nor notched out when I warned from she.... Ummm... :-<

  Thanks for reading.


Yoshihiro Imaishi JF6BCC/KH2GR
GL:PM53JV, ex KC6IY(T88IY),V63BP
mailto:jf6bcc@jarl.com or jf6bcc@jamsat.or.jp
<http://plaza16.mbn.or.jp/~palau/> Sorry, Japanese only now.
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