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impedance matching etc
Our own GP antenna with HyGain traps
Messages can be combined for longer record and playback times
BNC/m to F/m
50 ohm unbalanced feed and you have to use a 4:1 balun
Ramsey Microwave Motion Detector MD-3 Kit Transceivers impedance matching etcA microwave detector is useful when you need to control all directions 360 degrees, as well as up and down. We have used it to control the door, the car etc. Easy to build and can be your best safety control. We have also used it to have a cellular phone send alarms to a personal phone. It registers movement from 2 3 m distance. True microwave Doppler shift operation Unaffected by heat, light, sound, humidity or temperature A real microwave
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