This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
This sophisticated power supply from the 80s uses components from the period, which makes it...
We found this small shortwave transmitter circuit in a 1994 documentation. The frequency of the...
This circuit generates a signal up to a few megahertz depending only on the LC resonant circuit...