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 1974 integrated circuit manual. Operational amplifiers can be of...
This oscillator can be used as a CIock-Triggered for various electronic applications. Oscillation only...
This circuit called “surf man” was published in the August 1992 Radio Electronics magazine. It...