[Elecraft] K3 Sub-receiver use

[Guy Olinger K2AV]

The trick involved in that switch is a very high isolation between the
two IF's (RXA and RXB) currently very nicely highly isolated.  If that
is degraded, then one starts hearing in one receiver the contents of
the other. Not at all a trivial modification, as high isolation
switches are not cheap.  So I suspect dynamically selecting display on
one RX or the other has a big price tag to it. And perhaps has an
internal space price to it.

I would think, however, that when installing a sub-RX, that perhaps it
could be cabled and the K3 options set to use the sub-RX on the P3 all
the time, WITHOUT opening the pandora's box of high-isolation
switching of RX IF's. This would be in the same vein as choosing the
RX paths when installing the sub-RX to start with.  Without the time
to think that through carefully, I'd currently chose that were it
available.

73, Guy.

On Wed, May 26, 2010 at 12:29 PM, Radio Amateur N5GE <n5ge at n5ge.com> wrote:
> On Tue, 25 May 2010 21:25:15 -0700, Alan Bloom <alan at elecraft.com>
> wrote:
>
> Ouch!
>
> Does this mean that the P3 will not display the frequency of or the
> signals seen by the KRX3?
>
> If that is true, it is a show stopper for me.
>
> TOM, N5GE BT 73 ES GUD LUK
> AR DE N5GE SK
>
> http://www.n5ge.com
>
>>Yes, the P3 assumes it is connected to the main receiver's IF output, so
>>if it is actually connected to the sub-RX it would still work but would
>>not display the correct frequencies and levels.  If this becomes popular
>>enough maybe we should think about adding sub-RX support to P3 firmware.
>>
>>Alan N1AL
>>
> [snip]
>
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