[Elecraft] H mode mixer

[Geoffrey Mackenzie-Kennedy]

Hi Julius,

It might have something to do with Intellectual Title, but not being well 
versed in such matters I could well be wrong. I have read very recently that 
the H-Mode is being used in a new receiver for military use, and I know that 
Rhode & Schwarz use a very similar mixer in one of their "Professional" 
receivers designed during the mid or late 1990s - I would have to look up 
the model. Perhaps the differences in the R&S mixer are sufficient to 
prevent legal problems. I have asked myself the same question as yours 
because the original H-Mode design appeared at least 15 years ago and has 
been "maturing" ever since, and without any doubt is a high class performer.

In the European amateur press the H-Mode has received good coverage which 
includes the publication of rceiver designs in which the mixer is used. The 
ARRL Hanbook 2001 includes a description of the "Triad" receiver, a relative 
of the receiver in the CDG2000, the latter was offered as a kit if memory 
serves me right.

73,
Geoff
GM4ESD


Julius N2WN wrote:


> 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