[Elecraft] K3 and PSK31 Data Mode and ESSB

[Dave G4AON]

I've just checked my K3 and DM780, I have the 6 KHz "AM" filter. The
bandwidth appears to go to 4 KHz on the ESSB menu setting, but in fact
the waterfall in DM780 only shows audio out to 3.5 KHz bandwidth on
receive. I can move the centre frequency of the DSP filter to 2 KHz
(normally it is 1.5 KHz) which sorts out the HF end showing on the LO
and HI settings 0.00 and 4.00 respectively. The 3.5 KHz bandwidth looks
to be fairly easy.

You might like to check with Lyle, KK7P, as to whether 4 KHz is
something that can be incorporated in later firmware without needing to
resort to shifting the centre frequency.

I've not tried transmitting with ESSB/data mode settings.

73 Dave, G4AON
K3/100 #80 f/w 3.03
--------------------------------------
I presently operate my K2/100 in PSK31 data mode with a 2.8 kHz wide
waterfall on the DM780 Superbrowser. I can click and transmit from about 600
Hz to about 1600 Hz on the Superbrowser waterfall without too much
attenuation of the transmitted signal. I made this determination using a
field strength meter and also in-line watt meter.

I would like to run a 3.5 kHz wide waterfall and be able to click and
transmit in the full width. Does anyone have experience using the K3 in this
way with ESSB and the 6 kHz roofing filter? In my reading of the K3 manual
it seems that this would be possible.

Thanks and 73's
Bill Strong
WA5KPE