Useful to amplify and distribute video signals with low noise and without losses. The CA3100 is a fast opamp designed to amplify video signals with low noise and without losses.
This one uses a diode bridge.
The circuit can serve as a low-noise preamp for spectrum analyzers and other 50 ohm measurement equipment or as an output-power amplifier for signal generators and oscillators.
pictures of a linear amp using 5500 Volts on two QB5/1750 tubes at HF for 3200 watts out.