This circuit was found in a Ferranti documentation from 1969. The transistors are common types of the company at the time. Smaller equivalents may be used. The output power is of the order of 150 mW.
This high sensitivity receiver of 30 nW was found in documentation from the 1980s. Integrated...
This circuit is an alternative to using Darlington power transistors in the previous amplifier. The...
The trigger element of this circuit is a neon lamp. The SCR admits an equivalent. We found it in...