This is the traditional configuration of a standard lamp with a rectifier. Only incandescent lamp can be used and for the rectified version a 5 W lamp.
This small crystal microphone transmitter was indicated in an 80s spy book. The range depends on...
The circuit we use makes use of Linear Technology's LT3080 (www.linear.com) which consists of a...
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...