This old circuit, from the 80s, was found in American documentation. The circuit uses dual gate FETs (MOSFETs) and has no data on the coils used.
This variable voltage reference uses a Norton operational amplifier. The voltage is adjusted at...
This 6 transistor TR26 commercial radio was sold in Japan in the 60s. It is a super heterodyne circuit...
n be assembled with BC558 transistors for low power transistors and a BD136 for the output. The...