[BC] Lee de Forest

[jpotter at jpotter.com]

That was called a 'reflex' circuit, and I saw it replicated in solid-state in an early GE transistor manual. It worked well, and was intended to save money when transistors were just introduced and thus very expensive. 

Jim Potter
 
The path of the righteous man is beset on all sides by the inequity of the selfish and the tyranny of evil men. Blessed is he who shepherds the weak through the valley of darkness for he is truly his brother's keeper and the finder of lost children

>A soft-tube receiver amplified both the RF and the audio in a single tube circuit, sort of line a pre-Muntz receiver!