This circuit for 6 lamps was found in old American documentation. The supply is of high voltage and the current drawn is very low.
This three-transistor amplifier uses a JFET at the input to increase the input impedance. The...
We found this simple mixer in a 90s Radio Electronics. The used FETs are still common. The inputs...
This circuit was published in an Italian magazine Radio Elettronica in February 1976. The...