This circuit was found in a British documentation from 1969. It can be implemented with modern transistors. The pass band is 6 MHz.
This circuit is from a Popular Electronics from the 90's. The circuit directly drives high power...
This circuit is from 1991 but can be assembled with a 2N2646 unijunction transistor. When turned on,...
May 2017 - Vishay's new AC0x..CS series safety wirewound resistors can now be obtained from Mouser...