This signal injector and tracer (follower) was found in an old American documentation. The transistors can be general use and power is made with one or two common cells.
When the lights turns off this circuit will produce a sound like a cricket. When the lights are...
November 2016 - The new Ohmite TO-126 power resistors in the range of 0.09 Ω to 51 kΩ with...
The S-meter is signal strength meter, coupled to telecommunications receivers to indicate the...