The Armstrong Oscillator did not simulate as well as I wanted so the two AC generators are added.
Top left is long wire antenna input.
The top 86.5 uh coil is "tickler" close enough to cause magnetically output feedback into 577 uh coil to oscillate circuit. Tickler is 10 to 20% of turns on lower coil.
The 12AT6 vacuum tube is a miniature Double Diode Triode with heater not shown ( 12.6 volt at .15 amp of current).
Antenna trim capacitor is adjustable 3 - 30 of. Also, 140 pf is adjustable range.
Audio out is on right after 100 nf capacitor.
AM range of this set can adjust to about 150,000 Hz through 18,000,000 Hz.
