[Elecraft] IF shift

[Don Wilhelm]

Jeff,

IF shift is practical in multiconversion receivers, but the K2 is a single
conversion design (for fewer spurs, better dynamic range and better IMD).
To implement IF shift in a single conversion receiver would mean changing
the BFO in sync with the VFO - and that is not an easy feat.  It might be
practical in a one-band, one sideband receiver, but I don't think you would
want to sacrifice your multiband K2 just to have IF shift.  If you wish to
extend the principle to both sidebands or to additional bands, the scheme
gets complex.  Yes, a larger microprocessor could possibly do that, but
there are other requests for added functions when (and if) more storage
space is available - due to the complexity of IF shift in a single
conversion design, I would believe that is WAY down on Wayne's list of
'things to do'.

73,
Don W3FPR

> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Jeff Kinzli
> Sent: Wednesday, February 07, 2007 6:50 PM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] IF shift
>
>
> Hey friends, how hard would it be to implement something along the
> lines of an IF shift, ala the TS830S IF shift? That's something I
> really like about my 830 and it seems like it would be a nice addition
> to the K2.
>
> Along the same lines, would it be feasible to have an outboard
> S-meter needle?
>
> I guess I'm somewhat old fashioned :)
>
> I do have the DSP module in my K2, and I guess I could achieve similar
> results with that, yes? It's just that it's not a simple knob to
> turn...
>
> Thanks for any thoughts,
>
> Jeff
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