Richard Ferch wrote:
Steve Ward said:
> I just applied the latest beta firmware as I have done many times
> before, and it looks like this time my power calibration went out the
> window. I'm putting out about 70w on PSK31 when I dialed in 45.
>
> Just wanted to give folks a heads-up to watch their power output when
> they start operating under new firmware, it might be time to re-calibrate!
It's more than just the power calibration. Even after calibrating power and
setting the requested power below 50W, with either 2.73/1.98 or 2.72/1.98
the power output on PSK31 (in DATA A) mode often exceeds the requested
power, which results in splatter. I have been having to constantly ride the
LINE IN and/or sound card output level controls in this weekend's PSK
contest to keep the power below 50W and PSK signal quality acceptable; I
have now switched back to 2.67/1.96 for the remainder of the contest.
Agreed that calibration is apparently not the issue. I did some testing
with a dummy load. Sending a PSK signal (just "TX" mode no data) I see
9 bars on the RF Power display on the K3. The MFJ dummy load's meter
(FWIW) shows approx 50w average output but much higher peak reading. I
have no idea how accurate the meter on the MFJ is, but something is
definitely changed with this revision.
73,
Steve
AD7OG
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