This 80's circuit can be implemented with modern equivalent FETs with lower on resistance. The attenuation is 80 dB at 100MHz.
Using three gates of t4011 this oscillator produces a rectangular signal with frequency given by...
Data from a serial output can be transferred to a remote serial input via an optical link via...
This 50 kHz to 250 W circuit was found in an old RCA documentation. The transformer is a...