Microwave oven leakage tester.

Stewart of Reading has a second hand one from CELTEK but it costs more than a microwave oven.

Maplin has one (part number N76AW45) for £4.29.

Don't know if either of the above is any good.

Chris

Thanks, I sort of figured Maplin might but they're 8 miles away in the next town where there's never anywhere to park. Unless one turns up locally It'll have to be added to the "things to get from Maplin" list, eventually the list gets long enough to justify the indignity of going on the bus - and use up all the money off vouchers.

hi, quiet some time ago , ea ( electronics australia) or was it eti ( electronics today international ) had schematics on a microwave oven leakage detector

Yes I remember that one, it had two ranges, a sensitive range so you could see that it is working near a normal microwave oven, and a less sensitive range where the calibration should have been valid, but where it might be harder to tell if the meter was working properly because a normal microwave oven wouldn't cause much deflection. The advantage of that meter design was that they had built one and had it calibrated, so copying their PCB should have resulted in similar sensitivity. Basically it was just a Shottky diode across a meter movement, with a little dipole antenna connected to the diode I think. I have built something similar with an Avago/Agilent/HP diode, I think a HSMS2822 or similar. I found that tuning the dipole for the right frequency resulted in a surprisingly large increase in sensitivity.

Chris