Featured in the February 1949 Radio Electronics magazine, this benchtop instrument generates multi-range audio signals. The circuit has 6 tubes including the rectifier.
The LM11 operational amplifier is not common today. The circuit was obtained in the Linear...
Only one LED is turned on when S1 and S2 are pressed. The LED that will be on is just the...
This is one of the first transistorized receivers (2N107) published in the Radio Electronics...