This 6-transistor Japanese commercial radio was manufactured in the 1960s. The receiver is a super heterodyne type with germanium transistors and is powered by a 9 V voltage.
An FM receiver with good sensitivity and with acceptable sound quality in the strongest stations, can...
This filter has a factor Q = 10 (selectivity), and its frequency can be changed as shown in the...
With the capacitor used, this circuit provides delays of 40 to 60 seconds. Larger capacitors can...