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

[Phil Wheeler]

Re "I can work around this.": Buy two more 
filters, Rick? :-)

Phil W7OX

On 7/12/15 7:13 AM, rick.ag6ay at gmail.com wrote:
> Here is what I posted on the Yahoo group just now.  I hope a little time
> helped clarify my description....
>
> post starts now ...
>
> I can better explain and reproduce the issue now.  Thanks to Dale  WA8SRA,
> Don W3FPR , and Wayne N6KR for hints along the way
>
> I have the following 8-pole filters
> Main: 1=15k, 2=6k,  3=2.8k, 4=2.1k, 5=0.4k
> Sub: 1=0.0, 2=0.0, 3=2.8k, 4=2.1k, 5=0.4k
>
> I am tuned to 10.000 MHz USB in diversity mode with Lo = 0.00 and Hi = 3.0
>
> I observe RX A XFIL = FL2 (6 kHz) and using BSET I see that RX B XFIL = FL3
> (2.8 kHz)
>
> At this time RX A passband starts at 10.000 MHz but RX B passband is shifted
> -1.5 kHz to start at 9.9985 MHz
>
> Now I decrease Hi to 2.8 kHz.
>
> The instant I do this, RX A XFIL shifts from FL2 (6 kHz) to FL3 (2.8 kHz)
> and RX A and RX B passband are both aligned properly to start at 10.000 MHz
>
> I can work around this.
>
> Cheers
> Rick AG6AY