28mm solid state.
A new concept in microwave kits.
The apparatus is extremely easy to use, compact and portable.
Transmitter can be powered from a 12-volt AC/DC source or from a mains adaptor (supplied).
Receiver has an internal 9-volt battery but can also be powered by a mains adaptor.
Receiver has internal audio amplifier, speaker and signal strength meter.
Complete kit comprises:
transmitter, receiver, diode probe, wax lens, wax prism, hollow plastic prism, metal reflector plates (two large, two small) metal diffraction grating, polarising grille, microphone, partial reflector, mains adaptor plus a very comprehensive instruction manual.