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Karl, for the past year I have been monitoring a Mexican TV carrier at 61.239 MHz USB, using an old Icom PCR-1000 (I imagine your Alinco would provide similar results). My Spectrum Lab plot looks similar to your carrier at 1130 Hz, and yes, quite different from the old R_Meteor plot.
Perhaps the difference between your SpecLab plot and my SpecLab plot might be due to the SpecLab settings.... brightness, contrast, FFT size, etc?
Since I started monitoring this Mex TV transmitter, probably around 1000 km distant, I haven't seen any aircraft trails.
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