Found in Unitrode documentation from the 1980s, this circuit makes use of PUTs, currently common components. The circuit must be powered with voltages around 15 V.
This precision speed control was obtained in an Electronic Design from the 90's. The output final...
This amplifier for old record players has RIAA correction and was found in documentation from the...
We found this configuration with a logic circuit that is now uncommon in an 80's documentation. The circuit...