This circuit was found in the magazine of radio amateurs 73 in a 90's edition. The components are current and the transistor is of general use.
This sensitive circuit for triggering relays was found in an old English publication. It works with...
The integrated circuit used in this amplifier is uncommon today, since the project is from the...
This circuit is for collectors. It is the circuit of one of the most popular transistor radios of the...