This circuit was found in a Japanese publication in 1975. It provides 30 W per channel using the SI-1030G modules. The module must be mounted on an excellent heat sink.
This circuit is used to detect PLL signals from the 4046 IC. The circuit is from an Electronics Now from...
This amplifier or stethoscope with headphone output and using a crystal microphone was found in a...
This circuit uses an 80's operational amplifier. The circuit is from an old RCA manual and can be...