Bill W4ZV wrote:
>
>
>
> HB9DRV:
>
> >The delay in the sub-RX is making me reconsider whether to buy
> the sub-RX and instead just buy a second basic K3 to use for RX.
>
> I'm having similar thoughts since I already ordered
> a second K3 in September, mainly for SO2R use. For true
> diversity, it would be necessary for both rigs to be phase-
> locked to the same source and then use an external control
> program (e.g. HRD, N1MM) to program identical frequencies, etc.
> It should not be too hard for someone to figure out how to
> run both rigs from one unit's reference oscillator. In my case,
> since I will have two units anyway, the incremental cost might
> actually be less than the cost of a KRX3. Still thinking...
>
Yet another option might be to carefully calibrate
both K3s to the same frequency, and hope that the drifts
of both would be similar. Or buy 2X $99 KTCXO3-1s which
are spec'ed to +/- 1ppm (firmware corrected to 0.5ppm) and
hope temperature and aging drift would be very similar. This
would still not be true diversity using phase-locked receivers
but would be better than other rigs currently on the market
(Orion's Main and Sub in my unit were offset by ~2.33 Hz).
If my second K3 arrives before the KRX3, I may
give this a try before taking delivery of the KRX3. Another
benefit of this approach is much more flexibility in antenna
switching.
73, Bill W4ZV
--
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