[Elecraft] Subject: Re: KPA1500 with K4 tracks VFOs with 1 kHz resolution

[Ed G]

Hi Wayne,
     Will the future new KPA500 and KAT500 Auxbus protocol involve new hardware interface revisions, or would this just be a firmware update?  I’m thinking if hardware, it is perhaps best to wait just a bit for the amp and tuner to be upgraded before buying?
--Ed, N3CW—



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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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