Found in 1948 MIT documentation, this 4-tube amplifier is characterized by its low noise level.
This two-stage amplifier hás a high impedance input and excelent voltage gain. It can be used as a...
This circuit for experimental radios and other applications is from a documentation from the 50's....
September 2017 - SparkFun offers through Mouser Electronics its protboard solderless board that...
