Running at reduced power for RTTY is probably a good idea. My TS-570
died in the middle of a RTTY contact at 100 W. and as bad as that was,
I'd hate to think of it happening to a K3!
Bob, N7XY
On 7/17/16 7:24 AM, George Kidder wrote:
Thanks Don for the explanation of what is going on with the "ALC" meter.
I have two suggestions relative to using my K3/100. The first is a
suggestion I made by email some years ago, with no reply. When
changing from "Spkr + Phones" to "Phones" ( that is, spkr off) I need
differing audio levels due to the different efficiencies of the
speakers and phones. So I crank up the gain on when using phones. So
far so good. BUT; the monitor level remains constant, and changing
that is a different process. I'm sure that for some, having the two
audio levels independent is a good thing - for me, it wold be nice to
link them. Could a menu option be constructed which would allow for
linking monitor and receiver audio?
My second problem is that when running CW or SSB, I like to use full
power (100 W). On digital modes or FM, it seems prudent to limit the
rig to 50 W. The power level is currently saved "per band" - cold it
be saved "per mode" as well? This would save a lot of "oops" time.
Or maybe these functions are already available and I just haven't
found them!
George, W3HBM. Bar Harbor, ME
On 7/17/2016 9:19 AM, Don Wilhelm wrote:
Lee (and others)
It is normal for the power control circuits to be reset after a band
change. That prevents overshoot if you are driving an amplifier.
Normally the power will come up to the requested power level in a
couple dot times on CW, or several syllables when operating voice.
If the problem is on voice or data, make sure you are driving the
audio sufficiently. If you are not driving the K3 audio hard enough,
power control will be "flaky".
For Voice: With the compression set to zero, you should produce 5 to
7 bars on the ALC meter. After adjusting the mic gain for that
indication, increase the compression as you choose - normally I would
suggest compression of less than 10dB.
For RTTY, if you are using FSK D mode, the power control should be
automatic, but if you are using AFSK A (or other soundcard data
modes), then do check your audio drive - of course compression should
be set to zero, but the audio drive should drive the ALC meter to 4
bars solid with the 5th bar flashing.
Note that the K3 controls power differently than other transceivers.
Ignore the advice on the internet to show no ALC and adjust the power
with the audio level.
With the K3 (and K3S, KX3, KX2), the "ALC" meter is a combination
"VU" meter and ALC meter. The 1st 4 bars are there to help you
adjust the audio level. The onset of ALC is indicated by the 5th
bar. So 4 bars solid and 5th bar flickering is the "no ALC" point
for the K3.
In data modes, adjust the power with the Power knob, not the audio
level.
73,
Don W3FPR
On 7/17/2016 8:38 AM, Leroy Buller wrote:
Operated RTTY NAQP this weekend. When changing bands, I noticed my
power
would drop to 40 watts or so. After several transmissions, it would
rise
to 100 watts. I don't think this is normal. All antennas are
matched.
Comments?
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