[Elecraft] [K3] Odd freq shift in diversity mode after VFO upgrade

[Wayne Burdick]

Rick,

If you have a combination of 5- and 8-pole filters in the main and/or sub receivers, it's the new firmware isn't adjusting for the difference between the two when in diversity mode with the new synths. I'll look into that, and if it's a firmware issue, I'll get it fixed ASAP. 

What filters do you have installed? You can use K3 Utility's crystal configuration screen to check this without opening up the radio.

73,
Wayne
N6KR



On Jul 11, 2015, at 10:56 AM, rick.ag6ay at gmail.com wrote:

> Hi all
> 
> I have a very odd thing happening in diversity mode after installing the new
> VFO's.  I have a K3 with dual receivers and new VFOs using a dipole and loop
> antenna when in diversity.  I also have a P3.  I am on current 5.29 firmware
> and have successfully gone through all required calibration steps after
> upgrading the VFO.   
> 
> Scenario follows ... 
> 
> I am listening to WWV 10 MHz in USB mode.
> 
> When I am in Split, not Diversity, WWV zero beats at exactly 10.000 MHz. 
> The P3 green band denoting the K3's passband is nicely lined up with the
> upper sideband of WWV.
> 
> When I am in Diversity mode, however, WWV zero beats at exactly 9.9985 MHz. 
> On the P3 I clearly see the WWV signal at 10.000 MHz while the green band
> denoting the K3's frequency is just as clearly 1.5 kHz lower.
> 
> I can't figure out what is causing this -1.5 kHz shift!
> 
> I have had my K3 for some time so I feel I am reasonably competent with it
> :) but this has me stumped.
> 
> I have asked K3 Support about this but I thought someone out there might
> have seen and dealt this this already.
> 
> 73 
> Rick AG6AY
> K3 5706
> P3 1835
> 
> 
> 
> --
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