Amplifier stage with the T411E (T411E)

The pentode tube used in this circuit has 1.5 V filament. The circuit is a voltage amplifier with the 1U5 tube.

62 mW Stereo Amplifier Handset (CB15569E)
The circuit shown in the figure consists of an amplifier for stereo sources with Maxim's MAX9723...
Power supply with zener regulation (CB23688E)
This simple low current circuit was found in a Radio Electronics magazine from August 1960. The...
Power amplifier (CB23607E)
This small 2-transistor amplifier was found in the Radio Electronics magazine of May 1959. The...