[mailto:jimmil...@stl-online.net]
Sent: Sunday, September 15, 2019 10:24 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] K3 original - ALC erratic
K3 original - ALC erratic
Noticeable on digital mode(s?) (FT8). The ALC - set at 4 solid and 5th
flashing - is far more critical than I remember. Seems
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw K4TAX
Sent: Monday, September 16, 2019 8:09 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 original - ALC erratic
With my K3S I do find there is a relationship or i
Jim,
The audio level settings have finer resolution when set to a mid-range
value. Make sure none of the audio controls (including the mislabeled
"POWER" slider in the application software) are not set near the upper
or lower extremes.
You have at least 3 level controls to consider - the
I find that with my K3S, a tone applied that is divisible by 500 {500
Hz, 1000 Hz, 1500 Hz, 2000 Hz, 2500 Hz} or any tone likewise divisible
by 600 or multiples there of will cause the ALC indication to fluctuate
in a rhythmic pattern. Changing the tone frequency as little as +/-3
Hz
I don't propose to know the full details but I would assume that being
an SDR the K3 digitises the audio at some point. If the sampling rate
and the audio frequency have the right relationship then you can expect
to see those fluctuating effects. I have seen this when making
distortion
With my K3S I do find there is a relationship or interaction with the
scan rate of the ALC display and the frequency of the tone supplied by
FT-8. Specifically 1500 Hz will appear to have fluctuating ALC display
while the actual level is not changing. By setting the tone, TUNE is a
good
Try reducing the output level from the computer to about one third from the
bottom of the scale. This will give you finer resolution with the LinIn control
on the radio giving you finer control.
Sent from my iPhone
...nr4c. bill
> On Sep 16, 2019, at 1:17 AM, David Gilbert wrote:
>
>
>
Agree. I'd bet the K3 ALC level is more stable than the sound card
output of many computers. I would doubt that Windows likes to mess with
that from time to time as well.
73,
Dave AB7E
On 9/15/2019 8:28 PM, Martin Sole wrote:
Sounds like the audio level into the radio has changed.
Is the tone frequency changing with the ALC changes?
Not all sound cards are ‘flat’ levels across a range.
Verify it’s the ALC by not changing tones.
Rick WA6NHC
Smell Czech correction happens
> On Sep 15, 2019, at 9:23 PM, Jim Miller wrote:
>
> K3 original - ALC erratic
>
> Noticeable
Jim -
I have no answer, but mine has always been extremely critical. I can set it
for 4 bars... and it won't budge... but I can't set it for the 5th bar
blinking... it goes from 4 solid to 5 solid no matter how much I play with
the various level controls. I don't do a lot of digital work, so I am
Sounds like the audio level into the radio has changed.
Martin, HS0ZED
On 16/09/2019 10:23, Jim Miller wrote:
K3 original - ALC erratic
Noticeable on digital mode(s?) (FT8). The ALC - set at 4 solid and 5th
flashing - is far more critical than I remember. Seems like I could easily
set it
K3 original - ALC erratic
Noticeable on digital mode(s?) (FT8). The ALC - set at 4 solid and 5th
flashing - is far more critical than I remember. Seems like I could easily
set it exactly where I wanted it and it would stay there. Now not so.
Just wondering what can affect the adjustment to
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