This simple unijunction and bipolar generator appeared in Radio Electronics magazine in September 1865. It generates signals from 100 kHz to 60 MHz and is powered by two 9 V batteries.
Found in an American documentation from the 90s, this circuit works as a receiver for a data...
This experimental amplifier was found in the 1960 Mullard transistor reference manual. The...
This circuit makes use of an uncommon TTL component today, but it can be implemented with...