The power supply for this 1972 circuit must be symmetrical and the BC549 transistors. Care with the layout is important to avoid capturing tinnitus.
This circuit was found in Radio Electronics from the 90s. The CMOS integrated circuit is a PLL not...
This circuit was found in a Japanese publication in 1975. It provides 30 W per channel using the...
Depending on the value of C1, this oscillator can produce signals of up to 1 MHz. For a capacitor of 10...