[Elecraft] KPA1500 with K4 tracks VFOs with 1 kHz resolution

[AL7CR]

Can you please confirm this means, at present, that the K4 does NOT interface with the KPA 500 and KTA 500 via the Auxbus.  If so, that is a major disappointment.  I presume operation is still possible in the frequency sensing mode as it is with non Elecraft amps.  Just writing that last sentence makes me sad.  

I would have thought the K4 would have shipped with a K3 compatibility mode.  Surely I am not the only one considering replacing my K3 with a K4 and expecting not to lose capability.  It is also a bit sad that, if I understand correctly, you only HOPE to add compatibility in the near future.  There must be more KPA/KTA 500 out there than KPA 1500 by a huge margin.

AL7CR



On Sun, Jul 19, 2020, at 1:52 PM, Wayne Burdick wrote:
> Those using a K4 transceiver with our KPA1500 amp will have the 
> advantage of +/- 1 kHz resolution in VFO tracking. In many stations, 
> this finer resolution will result in lower SWR and improved amplifier 
> performance, especially on the lower bands. (The original resolution 
> was +/- 8 kHz.)
> 
> This is part an overall upgrade of our Auxbus control interface, taking 
> advantage of the additional processing resources available in the K4. 
> The revised protocol allows for more robust RFI rejection, as well as 
> future enhancements to amp/tuner control. 
> 
> At present only the KPA1500 supports radio type K4, but we hope to add 
> this capability to the KPA500 and KAT500 in the near future.
> 
> All amps and tuners will continue to support the original Auxbus 
> protocol, remaining 100% compatible with our existing transceivers.
> 
> 73,
> Wayne
> N6KR
> 
> 
> 
> 
> 
> 
> 
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