I was able to participate in the FMT last night (around 10 PM local time). This was a pretty big deal for me, because I haven’t been in the basement that late at night since I was in the hospital last October (my equilibrium has been quite bad, especially at night, making the journey from basement to bedroom a challenge).
I was fumbling wildly with the Spectrum Lab settings during the initial call-up on 40-meters. I thought I’d be able to locate my target tone (about 1000 Hz) quickly. I wasn’t. I finally got things locked in right as Connie K5CM went carrier down.
The results below are simply an audio analysis and don’t reveal my receiver dial frequency. The audio frequency is either added or subtracted from the RX dial frequency depending on which side of the carrier the tone is received.
The image above is a screen capture from DL4YHF’s Spectrum Lab (Audio Signal Analyzer) taken during the 40-meter run (somewhere near 7.065 MHz). You can see how the signal spreads out over the two minute key-down interval. I saw a minimum of 1011.6762 Hz, and a maximum of 1012.240 Hz. Visually I called the tone at 1012.03. After mathematical analysis, it seems more like 1011.988 Hz. The signal shifted over a range of 0.360 Hz (the actual frequency is somewhere in that noisy band). I might “hunch” a frequency of 1012.20 if I believed I knew what Doppler was at that moment. It will be interesting to see which of those three frequencies are closer to the mark (math=1011.99, eye=1012.03, hunch 1012.20).
The image above was taken during the 80-meter run (somewhere near 3.999 MHz). I saw a minimum of 997.8961 Hz, and a maximum of 998.3294 Hz. Visually I called the tone at 998.10. After mathematical analysis, it seems more like 998.138 Hz. The signal shifted over a range of 0.234 Hz. I might “hunch” a frequency of 998.20 if I believed I knew what Doppler was doing then. It will be interesting to see which of those three frequencies are closer to the mark (math 998.14, eye=998.10, hunch=998.20).
Results will be posted Sunday April 14 at 10 PM — Connie K5CM is that quick!
