This circuit was obtained from an 80's documentation from General Electric. The circuit uses an FET operating that can still be obtained but can be adapted to use more modern components.
This circuit, found in US documentation, can measure the power of transmitters up to 10 W, given...
This circuit was obtained from a 1966 magazine but can be easily assembled using the 2N2646 as a...
This circuit is based on one of the first germanium transistors. The power comes from a solar cell...