This circuit was found in a 1968 Hughes documentation. The transistors are from that time. The coil is for the medium or short-wave range.
This is a high voltage probe that allows the measurement of high continuous voltages with a common...
The circuit shown in figure is suggested by Texas Instruments (www.ti.com) and makes use of the...
This well-known configuration of the guitar effects pedal was obtained in an English magazine from...