[Elecraft] [K3] MD3; or MD7; command changes VFO B filter settings

[Wayne Burdick]

Hi Frank,

On any given band, both VFOs will normally be either in CW or CW REV.  
You can observe this by changing from CW to CW REV on VFO A at the  
radio; VFO B will also switch, if it had been in CW mode. However, you  
can then set up the filtering differently on the two VFOs (using FW,  
BW, IS, and other commands).

I just confirmed the behavior of the "MD" command that you observed,  
and will review it for a future firmware release. I hesitate to change  
it since a lot of application software expects it to work this way.

73,
Wayne
N6KR

Frank wrote:

> Hi all, I have noticed that when I send an MD3; or MD7; command to  
> my K3 (which sets the VFO A mode to CW or CW REV respectively), the  
> VFO B filter settings (selected filter, filter shift and width) are  
> changed to the values that are currently active for VFO A. This  
> happens with both 3.77 and 3.79 firmware. VFO B must already be in  
> CW mode for this phenomenon to occur. Can anyone reproduce this? 73,  
> Frank PA4N
>
> P.S. Maybe this phenomenon is a side effect of the following. In  
> general, the MD command only acts on VFO A. (The MD$ command is the  
> equivalent command for VFO B.) However, if VFO A and B are both in  
> CW mode and you send a MD7; (CW REV) command to VFO A, *both* VFOs  
> are set to CW REV. Apparently, the normal / rev setting applies to  
> the whole K3, not just one VFO. This makes sense. However, I  
> wouldn't  expect *all* VFO A settings to be copied over to VFO B  
> when an MD3; or MD7; command is issued.