The idea of this circuit found in a Radio Electronics from January 1966. The idea of the circuit is to improve the reception of audio signals, mainly telegraphy, working as a filter.
The purpose of this circuit presented in a 2009 documentation is to monitor, by means of neon...
This circuit is from the November 1974 issue of Radio Electronics magazine. The capacitor...
Found in a Popular Electronics from the 90s, this game can be seen in other configurations on this site. The...