The difference is Data A mode.
In Data A mode ALC action doesn't start until the fifth bar is lit AFAIK
it's been that way from the beginning.
With Elecraft rigs you don't control power out by adjusting audio level.
Adjust your sound card line out to 50%, or less, adjust your software to
50% or less, adjust the K3(S) line-in. Fine tune the line-in level to 4
bars steady and the 5th barely flickering. Once set don't fiddle with
it. Adjust power out with ye olde power knob.
If the manual says 5-7 bars for digital modes it needs fixing.
Data A, AFSK, SSB (upper or lower running a digital mode)should all have
zero ALC action. Been that way since PSK31 was new. On an Elecraft rig
that means 4 with 5 flickering occasionally.
On 9/8/2017 4:35 PM, Wes Stewart wrote:
I am often puzzled by some of this advice. The K3S manual on page 30
says among other things:
"While speaking into the microphone in a
normal voice, adjust MIC for a peak ALC
meter indication of about 5-7 bars (see below)".
Then regarding audio data modes it says on page 34:
"If you’re using an audio-shift transmit mode (LSB,
USB, DATA A, or AFSK A), you’ll need to set
the MIC level while watching the ALC meter.
You can use the same procedure outlined for voice
modes (pg. 30), except that speech compression
should not be used."
So 5 to 7 bars seem to be indicated. Where does the '4 solid, fifth
flashing come from'?
This is particularly questionable with constant amplitude modes, where
it doesn't matter whether there is ALC developed or not.
Maybe someone can enlighten me.
Wes N7WS
On 9/8/2017 5:36 AM, Don Wilhelm wrote:
Bret,
This is a condition we call "Power Hunting", and it usually indicates
that you do not have the audio level set correctly for Elecraft
transceivers.
Are you driving the audio to illuminate 4 bars on the K3S ALC meter
with the 5th bar flashing? You must operate Elecraft gear differently
than other transceivers because of the closed loop system used for
power control is different than the simplistic "control the drive
level" system that other transceivers use.
Ignore the internet (and WSJT-X) advice which tells you to adjust the
power with the audio level and set the power to maximum.
With Elecraft gear, set the audio as instructed in the manual and
adjust the power with the POWER knob.
73,
Don W3FPR
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to ksto...@ac0h.net
--
R. Kevin Stover AC0H
FISTS #11993
SKCC #215
NAQCC #3441
ARRL
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
