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.
We found this circuit in a 1956 documentation from Sylvania. The circuit is for bench testing and...
This circuit was found in the Radio Electronics magazine of July 19666. The search coils are the...
This circuit allows only signals with frequencies below the calculated value to pass. The formulas for...