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 circuit generates signals that can be adjusted in a small range around the frequency of the...
The transistor used in this circuit is uncommon today. AC124 or equivalent such as AC188K and...
a We find this circuit which has a traditional configuration in a 1988 publication. The circuit is...