Show and tell about my 10GHz wideband FM voice transmitter using an old burglar alarm. Myself and a fellow amateur bought these units from a local Amateur radio microwave group and built a unit each. We used then at a distance of 600 yards. The circuit I used can be found here:- [ Ссылка ] Please remember microwave energy can be harmful to your eyesight at close proximity. A radio licence is required in most countries.
