This circuit for the 60 kHz range was found in 73 magazine and published in 1995. The circuit uses a ferrite rod. Note the direction of the coil windings.
This differential pulse shaping amplifier was found in documentation from the 1980s. Switching...
This circuit operates at a frequency of 80 KHz and modulation up to 60 kHz. The circuit is from...
This surge test circuit was found in a 1980s ON Semiconductor documentation. The circuit makes use...