Digging through my junkbox I found I have two Omni Spectra
20090 detectors that use Alpha D5326098 diodes. They measure
a Vf of 240mV compared to a "typical" GE which has a Vf of
358mV. I measured 3 In34 and 3 OA81C and they all matched
within a mV or so..

I couldn't find specs for the Omin Spetras, but I also
have a HP 8472B "crystal detector" that The specs say
"low barrier Shottky"". It also measures 240mV.

I can easily get the Omnis apart so they may become
sacrifed tothe greater glory of SW.

In my net searches I was a little shocked at how expensive
the microwave detectors are even used.

Terry