This PNP transistor power stage was found in the May 1969 issue of Radio Electronics magazine. The circuit uses a transformer for excitation and requires 10W input for full output power.
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...