Flame Triode Amplifier and Oscillator, more experiments.

Описание: More info is available at http://www.sparkbangbuzz.com

The performance of the flame triode has been greatly improved by two factors: 1 assisting the filament heat by running AC current through it and 2 using 300 VDC plate voltage instead of 200 VDC. 300 volts was not available when the first flame triode video was made. It now is capable of driving a pair of 8 ohm headphones at a reasonable level.

This video shows the flame triode being used to drive a pair of 8 ohm headphones from a very high impedance (10 megohm) input. Even though a high to lo impedance output transformer is used, amplification is necessary in order to drive the headphones at the higher level heard in the video.

This video also shows the flame triode used as an audio oscillator using transformer feedback. A high impedance transformer is necessary so one was made by putting two "voice coil to grid" transformers back to back.

I am using a simple propane, no air mixture, flame. The flame source is an orafice from an old propane barbecue cooker. I used it because it was handy.

Played and recorded m'own music.