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.

RIAA Equalizing Preamplifier (CB4947E)
Indicated for vinyl media recovery, this circuit is from the 80's, having been found in an...
500 MHz Probe (CB3918E)
This circuit is intended for use with common oscilloscopes having been found in documentation on...
BCD to Analog Converter (CB5091E)
This circuit can function as a simple shield converter from BCD to analog outputs. The circuit...