[Elecraft] K3 (was SWL Receiver)

[Phil Wheeler]

George, W5YR wrote:

>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.
>

Don't have one.

>
>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.
>

I had one in the fifties (a BC-453).  It some how grew legs at a Field 
Day in the late fifties.

It really was quite an asset with the rcvrs having a 455 KC IF.

73, Phil