80, 120 waveforms from TDS1012B
100 ns/div  --> 244 periods per waveform
freq = 244.39 MHz vs 244.370 on the scope.
fwhm < 10 kHz
25 mVpp

same jfet oscillator as used for the 240 MHz data, just Vdd and Vgs have been tweaked.
Also, metal cover improves stability.