3-channel preamp (T484E)

This 4-tube circuit was found in an American publication from 1947. It is intended for audio distribution lines using a transformer source.

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Erase oscillator (CB7338E)
Suggested by Mullard in a1969 documentation, this circuit generates the erasure signal for tape...
Low noise preamplifier (CB8942E)
This low noise microphone preamplifier circuit was found in American documentation from the 90s....
Optical transmitter (CB20695E)
This transmitter for modulated radiation can be used as an optical data shield. The maximum...