This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer available that timer and the transistors are germanium types. The circuit is intended to receive MW stations.
This good quality audio amplifier with an output of about 10 W with the original transistor was...
This circuit uses the flip-flops from the previous circuit to implement a 3-digit binary counter. The...
This stage for general purpose transistors was taken from an old technical manual. The circuit can...