Found in old documentation, this receiver for the mid-wave range uses transistors from the era. In fact, modern general-purpose equivalents can be used.
This circuit is very critical in the adjustment. The coil should have at least 1000 turns of fine...
By pressing and releasing PB1, only one LED is lit, drawing a number from 1 to 6, as in a die. The...
This electromyography monitor is from a 1978 publication on operational amplifiers. The components are...