The theory of operation of Negative Resistance Oscillator

Anyone want to chip in on the theory of operation of this oscillator. What is this configuration called?

The name of the oscillator is Negative Resistance Oscillator.

I believe that when a parallel tuned circuit is used like in this case it should be called a negative-conductance type from reading up on this.

Starting conditions:

B=0
G<0

This can be analyzed in the normal open loop cascade fashion by applying what is called the Alechno tranformation.

(S.Alechno, "The Virtual Ground in Oscillator Analysis" Applied Microwave & Wireless July 1999)

This is a base grounded oscillator.Feedback is provided by parasitic capacitance of C-E junction.
But 1uH choke inductor which is used at collector has very high value. Because at those frequencies the inductor will show capacitive reactance beyond its resonance frequency.

To be more precise the Negative Resistance Oscillator (or negative-conductance whatever you want to be, gain or loss) could be seen as a Colpitts oscillator, with internal transistor base-to-emitter capacitance, and collector-to-emitter capacitance acting as a voltage divider.
This is the reason in this kind of oscillators can be used only transistors with relative high internal capacitances.