This input circuit for meters, which can also be used as a shield, is intended for operation with very low frequency signals. The power supply must be symmetrical.
This powerful amplifier with 2N3055 transistors at the output provides a few tens of watts rms on a...
With this circuit it is possible to receive and send audio signals simultaneously over the same...
This circuit generates 100 MHz signals from a 20 kHz crystal. The circuit is from an 80's...