[Elecraft] H mode mixer

[J F]

Geoff & Gian,

To play devil's advocate (I'm decent in this role), if
the H-mode mixers is as simple and as effective as you
both suggest. Why hasn't it been more widely adopted?

For the most part, I've seen a couple mixers boards
and mostly references to homebrew building, but
nothing in the way of kits or commercially offered
radios.

Considering how difficult the 40M situation is in
Europe, and how large the ham population is, certainly
one would think that someone would have championed the
technology by now...

Any thoughts on this?

Cheers,

Julius
n2wn