[HBR] HBR form factor - "mods"

[Ian Wilson]

This is a remarkable idea:

On Sun, Dec 26, 2010 at 4:27 AM, Walt Hutchens <waltah at earthlink.net> wrote:

> I
> (An 80/40 band imaging 'first receiver' of outstanding performance yet
> fairly easy to build uses a push-pull 1st mixer with a single toroid
> coil tuned by a dual section TRF-type variable. A separately tuned
> push-pull LO drives the cathodes of this mixer. Follow with two IF
> stages and a BFO/product detector, use a DC-coupled plate detector for
> AGC. AGC voltage can be applied to the mixer grids without perceptible
> oscillator pulling. I've described this receiver in more detail,
> before.)
>
> A beam deflection tube would fit right in here. The problem of providing
adequate push-pull voltage to the deflection plates - becomes trivial if a
single oscillator range is needed: make the beam deflection plates part
of the (push-pull) oscillator tank. This is done in the G3PDM receiver but
the bandswitching makes it somewhat complex.

I have a Super-X (using this to mean the 80/40 idea with lattice xtal filter
and preselector image rejection) chassis that has undergone several
changes of design. I think it may be time for another iteration....

73, ian K3IMW