Power stage (T409E)

This tube is similar to the 6V6 and 6AQ5. We found the circuit of approximately 1 W in modern documentation on experiments with tubes.

12,5W Amplifier with the741 (CB4023E)
This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with...
IR Receiver (CB875E)
This circuit can be used in alarms, data links or áudio links using IR radiation. The circuit is...
M204 Audio Preamplifier (CB849E)
This is a general purpose pramplifier launched in Brazil by Philips in the years 70. The BC549 is...