This is the traditional audio preamp configuration with the National Semiconductor LM382. The circuit has good gain and can be used with magnetic pickups or from signals from an auxiliary input.
This amplifier with very high input resistance has variable gain and must be powered by a...
This transmitter emits signals in the FM range, reaching a few meters away. The modulation...
This booster for listening to signals in the range from medium waves to 30 MHz was found in a 1998...