The "Jones" Super Gainer

[Skywave]

The oscillator ccts. that I have seen that use two non-coupled coils and no other forms of feedback have all been TPTG oscillators (which rely on anode - grid capacitance). Perhaps that is what was shown; doesn't sound like a Hartley osc. to me. I'll have a wander around the 'Net to see what I can find.

Al.