[Elecraft] K3 FIRMWARE UPDATE: MCU 1.87, DSP 1.69 (Finally!)

[Evert Bakker (PA2KW)]

Good day all,

I just uploaded the new firmware version which went smoothly.
After that I had to do some filter settings as I had my FM filter (yes, it
is in slot 1) already installed but it had to be enabled since the FM mode
is available now.

Normal procedure: go to Config, select a filter and tap the modes to set or
disable that particular filter. If you are for instance editing FL3 and tap
FM mode, it switches back to FL1. Be aware of that! I messed up the filter
settings. It would have been better not to be able to select FM mode when in
FL2-FL5 as the FM filter has to be in FL1 position, isn't it? 

Now the Q:
Can someone tell if and why listing in CW mode with roofing filter 2.7 Kc
and DSP set to 2.8 and centered sounds so different as when on SSB mode with
the 2,7 Kc roofing filter and the DSP at 2.8 Kc and centered? In this
particular situation (in CW mode) it is impossible to "read" an SSB or LSB
signal as if filters are totally different.  
  
I've got the feeling that this was not the case with the earlier version or
am I wrong?

When the roofing filter is 2.7 why does the DSP still have effect when
changed from 2.7 to 4.0 Kc (no, the roofing filter is not switched
automatically from 2.7 Kc (FL2) to 13.0 Kc (FL1)? At least the display still
says FL2. Are the slopes of the DSP so much steeper?

Is it possible to upload an earlier version?

Thanks, Evert PA2KW