This unijunction transistor circuit was found in Radio Electronics magazine from July 1968. The circuit operates up to approximately 100 kHz depending on C1.
This preamp with several inputs using germanium transistors from the time was found in Japanese...
This audio millivoltmeter was found in a 1992 publication. It can still be assembled, as the...
ROHM Numeric Displays ROHM sells through Mouser Electronics its common anode and cathode numerical...