i actually went looking for that 1N3747 military surplus mixer diode, but I think the only stock comes from people salvaging old equipment. Amazing how simple the circuit is. Magic!
My long-term fantasy is that after the election season is over in 2020, we take all those useless lawn signs for candidates and repurpose them into RF meters with red/yellow/green LEDs. If everyone in a neighborhood had one it would be much more obvious how pervasive those signals are. The 1N3747 video sparked my hope, but I am not yet handy enough to improvise on this idea. But some day maybe ...
Very interesting videos, Merializer! Now I wonder why a plastic German high-frequency analyzer cost me $400?
The Gigahertz and Cornet meters are supposed to be calibrated; so if you and I both test the field strength around the same microwave while it's running, we should both get roughly the same results - even if my meter is a Cornet and yours is a Gigahertz.
I'm not sure if that's true. I got some weird readings with my Cornet, and eventually the RF mode stopped working altogether. It also never told me the frequency of the signals it was detecting, which it's supposed to do.
So maybe having separate antennas for each of the common frequencies and hooking them up to a microamp meter like the one in Merializer's second video* is the way to go.