Valve Crystal Oscillator Grid Current

[Skywave]

Al actually measured it with modern Gear and a different Crystal maybe.

The test gear that I used was specified in that post of mine . . . . .
Quote: All r.f. waveforms were measured with a 300 MHz Tektronix 2465 'scope plus low capacitance X10 probe (7 pF); all d.c. voltage were made with a Fluke 77 D.M.M.
As for the crystal, the freq. was stated as 500 kHz, but the type of cut was unknown - but it was an ex-W.D. type - probably dating from early 1940s - so could easily have been an X-cut type.

Al.