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K3: Audio Level Ramp-Up in DATA-A

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Edward R Cole

K3: Audio Level Ramp-Up in DATA-A

I'm wondering if there is a way to escape the 4-5 second gradual
increase (ramp up) of audio drive when in DATA-A mode on the K3? I
run WSJT on DATA-A and every transmit sequence starts at about 50%
power out due to the audio drive ramp up. It takes the K3 about 4-5
seconds to reach full power. This OK when my transmit sequence is 1
minute long but there is a test mode under WSJT called Echo which
permits me to measure my own eme echoes. However, Tx/Rx cycle in
Echo is about 1.5 seconds long and I cannot test at full power. This
is a fully automated test routine so I can't use CW. The program
transmits a continuous tone which is the same as key-down on CW, and
returns a measurement of my Moon echo which is real nice to determine
system performance.

But I can't use the Echo function with DATA-A on the K3 as it is. I
wonder why the K3 acts this way in DATA-A? I did not have any issue
running WSJT test modes with my FT-847.

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
"Kits made by KL7UW" http://www.kl7uw.com/kits.htm
======================================
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Iain MacDonnell - N6ML-2

Re: K3: Audio Level Ramp-Up in DATA-A

Hi Ed,

1) Make sure you have 4-5 bars on the ALC meter when transmitting your
JT65 signal - insufficient audio drive could lead to the DSP
compensating by adding gain

2) Run through the TX gain calibration (see K3 Owner's Manual)

73,

~iain / N6ML

On Sat, Mar 3, 2012 at 11:14 AM, Edward R. Cole <[hidden email]> wrote:

> I'm wondering if there is a way to escape the 4-5 second gradual
> increase (ramp up) of audio drive when in DATA-A mode on the K3? I
> run WSJT on DATA-A and every transmit sequence starts at about 50%
> power out due to the audio drive ramp up. It takes the K3 about 4-5
> seconds to reach full power. This OK when my transmit sequence is 1
> minute long but there is a test mode under WSJT called Echo which
> permits me to measure my own eme echoes. However, Tx/Rx cycle in
> Echo is about 1.5 seconds long and I cannot test at full power. This
> is a fully automated test routine so I can't use CW. The program
> transmits a continuous tone which is the same as key-down on CW, and
> returns a measurement of my Moon echo which is real nice to determine
> system performance.
>
> But I can't use the Echo function with DATA-A on the K3 as it is. I
> wonder why the K3 acts this way in DATA-A? I did not have any issue
> running WSJT test modes with my FT-847.
>
>
> 73, Ed - KL7UW, WD2XSH/45
> ======================================
> BP40IQ 500 KHz - 10-GHz www.kl7uw.com
> EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
> DUBUS Magazine USA Rep [hidden email]
> "Kits made by KL7UW" http://www.kl7uw.com/kits.htm
> ======================================
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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Don Wilhelm-4

Re: K3: Audio Level Ramp-Up in DATA-A

In reply to this post by Edward R Cole

Ed,

Are you driving the audio to give you 4 bars solid and the 5th blinking
on the ALC meter?
The behavior you are seeing is normal if you do not have enough audio.

The lower 4 bars of the ALC meter do not indicate ALC, they are similar
to a VU meter.
The 5th bar indicates the onset of ALC.

73,
Don W3FPR

On 3/3/2012 2:14 PM, Edward R. Cole wrote: