[Elecraft] K3 (was SWL Receiver)

[George, W5YR]

Phil, in the meantime, perhaps you can get an idea of how such a receiver
would work by doing the following:

If you have or have access to a receiver with an IF-DSP architecture (any
of the Icom PRO series; Pegasus; Jupiter; Kachina 505), consider bringing
out from the K2 the 4.915 MHz IF signal from a point before the crystal
filter. This should be done through an isolation stage to preclude external
loading effects and altering with the source impedance for the filter.

Connect this output signal to the antenna of the IF-DSP receiver and tune
to 4.915 MHz.

Now, you have what could be a "super receiver"

	o the outstanding front end performance of the K2

	o the DSP IF filters and other DSP functions of the external receiver

Sure, this is not to use on Field Day, but for experimentation in the
shack, this could be a most interesting system to set up and evaluate.

In "the old days" we used to do the same thing by bringing out the IF from
a regular ham receiver and connecting it to the antenna of a surplus
Command Receiver which would tune the 455 KHz range. The much better
selectivity of the BC-454 was a tremendous improvement over most of the
medium- and low-priced ham receivers of the time. It use an 85 KHz IF and
the coupling of the IF transformers could be set "loose" for a very narrow
response. A QST article called it the "Q Fiver."

I expect to be in the K2 business soon and upon its completion, getting it
talking i-f to my 756 PRO is first on the list!

Any thoughts or comments?

73/72, George    
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe   
Amateur Radio W5YR -  the Yellow Rose of Texas
In the 57th year and it just keeps getting better!

Phil Wheeler wrote:
> 
> COLIN WHITMORE wrote:
> 
> >Ok, how about this. We convince the fine folks at Elecraft to produce a true general coverage receiver, package it with a K2/100 and the KAT100 all in one (slightly larger) box. Viola, a K3 is born! Dual VFO (one ham band, one general coverage), internal ATU, 100 watts, and all the other fine attributes of the K2.
> >
> 
> I think I will wait for the IF DSP version :-/
> 
> 73, Phil