This is a Japanese commercial radio from the 60s. The superheterodyne circuit of 7 transistors for medium waves has 200mW of output when powered by 4 common batteries.
Found in a 1969s American documentation, this circuit uses transistors from that time. The...
We found this circuit in a Radio Electronics magazine from January 1975. The transistors are...
This low-current control circuit has a lamp as a load, but can have other types of devices, such...