December 4th 2009 | ||
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We QSOed on 2320 MHz PA3DZL as initial #98 at 20:21 UT. | ||
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August 16th 2009 | ||
5.7 GHz JT4G tests | ||
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During the first 6 cm activity weekend we tried to make
JT65C QSO with Viljo, ES5PC. Unfortunately, we were not able to decode Viljo's
transmition, probably because of wide spread of signals, fast Doppler change
and relatively weak signals (about -25 dB). Moon was close to Zenith with high
declination at that time. Then we changed to JT4G mode. This is one of the new modes available in last version of WSJT 7.0.2 r1018. We have had no experience with this mode so far. We spent a few periods to set all parameters in proper way. With that we decoded Viljo's signal very easy like with JT65 modes. After QSO with Viljo we made again very easy our second JT4G QSO with Erich, OE9ERC. Signal levels commonly about -20 dB (more details in the log). BTW, quite standard HW was used. Notebook (Fujitsu-Siemens Amilo, AMD Turion 64 Mobile @ 800 MHz, 512 MB RAM with integrated sound card Realtek AC'97) with MS Windows XP home ed. communicating with Kenwood TS790 (IF 145 MHz) via Microham USB II interface. So, nothing special required, hi. The signals at both QSOs were audible on TRX speaker, CW contacts we made earlier. Viljo dropped a funny comment on HB9Q logger: "... It seems much easier and faster to make CW QSO than a JT one" (must be applauded by the CW sticklers, hi). Bellow you can find screen shots of our QSOs and link to .wav files
ES5PC JT4G contact
OE9ERC JT4G contact | ||
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