Good instability throughout the sweep with stable sweetspots, wide Voltage range but still low bandwith, which was not intended. Be free to pimp my circuit.
new log: now working with 2 12V bulbs in series at 9V 1.5-18V before a 220 Ohms res. BTs are 2x BC338, had them around, though with their 25V rating is a bit too small for experiments with oscillations. Lamps glow slightly.. while the filaments are heating up you here a rapid sweep until it tunes itself to a stabile frequency, steady glow and resistance. Cleaner that i had expected. Rapid attack.
