Found in an 1989 R-E Experimenters Handbook, this circuit produces several sound effects that can be modified. The signal must be applied to an external amplifier.
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...
The standard lamps consist of features of great importance for the test and repair bench. It is...
This is the transmitter for the previous circuit. We found it in a 90s Electronics Now. The...