This amplifier was found in a 1957 Rayrtheon documentation. The circuit can be fitted with a BC558 transistor. Driver and output transformers can be obtained from unused transistor radios.
This blocking oscillator circuit was found in a book by Rufus Turner from 1954. The circuit uses...
This circuit was obtained in a 1975 magazine, but it can be easily assembled using BC548...
This high-speed circuit was found in 1980s Linear Technology documentation. The circuit makes use...