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.
Used in satellite TV receptions in the 1980s, this circuit was found in the March 1980 issue of...
I found this simple circuit an English magazine from 1984. The circuit can be easily assembled by simply...
Found in an article in the August 1971 Radio Electronics magazine, this circuit supports 106...