The use of field effect transistors in this circuit improves its performance. This configuration is from a 1975 circuit manual. The transistor can be any general-purpose FET such as MPF102 or BF245.
September 2017 - Mouser Electronics is already stocked with NXP MRF13750H transistors for RF power...
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...
SST LLE Series Liquid Level Sensor Switches Available through Mouser Electronics, these solid...