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%
> So 5 to 7 bars seem to be indicated. Where does the '4 solid, fifth
> flashing come from'?
As explained by Wayne and Lyle several years ago, in data modes the
ALC meter scale is shifted so that any display below four bars shows
*audio input level* below the nominal operating point (whatever
Wes,
That information comes from the DSP designer who has on several
occassions stated that the onset of ALC is at the 5th bar.
He has indicated that from the time of K3 Firmware Field Test.
Why that information is not in the K3 and K3S manuals is a mystery to
me. It is present in the KX3
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
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
Adjusting power still has me stymied. Oddly, once set and TXing WSJT-X FT8
15sec cycles, it creeps up from 180-200W on the KPA500 readout towards 270W.
The P3TXMON reads lower but creeps up over 200W on successive TX cycles as
well.
I moved my components around as suggested so the TX feed is now
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s Jessee N4SRN
>
>
> -- Original Message --
>
> *From: *David Bunte
> *To: *Charles Bret Jessee
> *Cc: *elecraft@mailman.qth.net
> *Sent: *September 4, 2017 at 12:36 PM
> *Subject: *Re: [Elecraft] [KPA500] K3S/KPA500/KAT500 - Adjusting TX Power
>
> Bret -
>
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Of course Bob meant when the tuner is located at the
transmitter. When the tuner/matching network is located at the
antenna feed point, the SWR of the line changes and so do the
line losses.
73 Bill AE6JV
On 9/4/17 at 9:43 AM, rmcg...@blomand.net (Bob McGraw K4TAX) wrote:
I rather deal with
On 9/4/2017 9:43 AM, Bob McGraw K4TAX wrote:
I rather deal with a bit of SWR. The loss in the line due to any
amount of SWR on the line does not change with the use of a tuner.
There's another important issue that K6XX (engineer at Elecraft) alerted
me to. The distortion in an output stage
I wholly agree. Every tuner placed in line has loss, two have twice or
more the loss. I rather deal with a bit of SWR. The loss in the line
due to any amount of SWR on the line does not change with the use of a
tuner.
Of course the tuner makes the radio and its operator seem more
Bret -
W6FB - Jack, was spot on with his information regarding the differing
readings... but I have an added question. If your SGC-235 gives an
acceptable match, then why use the KAT500 at all? I think that it is seldom
a good idea to use two antenna tuners in series... at least that has been
my
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The three units are taking widely different measurements. The KPA500 measures
the signals it sees going into the KAT500,
while the KAT500 measures what it sees going into the choke. Finally, the
P3TXMON’s coupler measures what it
sees going into the coax going to the SG-235. It is quite probable
I'm learning about a new KPA500/KAT500 installed with my K3S. When I have the
K3S power knob set, in this case, to show 420-440W peak-hold as read on the
KPA500 LED screen, I see the KPA500 SWR showing 1-3 LEDs lit (it may stay at
1 LED or climb from 1 to 3 LEDs over 15sec TX, always below 1.5),
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