Steve,
On the K2 with any data mode, run the audio up until you see one ALC
bar, and then back it down until it just barely goes out.
That is the correct audio level - set the power to the level desired and go.
One thing about the K2 power level is that it is reset after a band
change or a power level change. That is better than creating a power
spike. It takes a couple of dits in CW or a few syllables in SSB mode.
Because your data audio stream is not syllabic, it may take a bit longer
for the K2 to adjust to the proper power level. There is no work-around
that I know of other than doing a "throwaway" transmission into a dummy
load after a band change or a power level change.
73,
Don W3FPR
On 3/17/2015 4:48 PM, Steve Kavanagh wrote:
I'm starting to play a bit with JT65 on HF (using WSJT-X) with my K2 and homebrew
interface hardware. The frequency response of the K2 seems reasonably flat, but
occasionally I see power dropouts when the tones change. This is despite always hitting
the requested power at any audio frequency using the "tune" button in WSJT-X.
It seems to happen less when I have plenty of audio drive - does it make sense that the
K2 power control might get a bit confused by switching transients when there is only just
enough audio to get the RF output up to the value set with the power knob? For those who
are using WSJT modes on the K2 successfully, what ALC readings do you usually run at ?
I'm hoping eventually to get the K2 going with transverters for VHF meteor scatter on
FSK441 - is the stock OP1 filter wide/flat enough to work well for this mode? S/N 4509
is the older of my two K2s. Any other hints for using the K2 on WSJT modes? 73,Steve
VE3SMA
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