Two-Tone Audio Generator (T326E)

This 1965 circuit generates 250 to 2,000 Hz tones with quality sine waveform. The power supply is not given and the tubes are of well known types.

13.8 V x 35 A Power Supply (CB1221E)
This circuit was obtained from an American publication of 1982, but can be easily assembled today...
Temperature Compensating Amplifier Stage (CB4247E)
In the figure we have a simple amplifier stage with a temperature compensated general purpose...
Epcos TDK TB2569 Film Capacitor
Epcos TDK TB2569 Film Capacitor EPCOS / TDK offers through Mouser Electronics are line of film...