Chronotron tube. The tube contains two heaters and two electrically isolated thermistor elements. Connected in the circuit of a low frequency oscillator, it controls the period by thermal feedback.
TT-21 has 1000 ohms heaters and 500 ohms secondaries resistances, 4 sec time constant.
Literatura
- - Manufacturers Literature
TT-21: Manufacturer's Literature
Emilio Ciardiello
Mas ...
TT-21: Manufacturer's Literature
Emilio Ciardiello
Just Qvigstad
TT-21: Manufacturer's Literature
Emilio Ciardiello
Mas ...
