K3 set up for RTTY and PSK

[W3ACO]

I seem to have a problem setting up my K3 for PSK and RTTY.  I use a
computer with mike input and headphone output to connect to line out and
line in of the K3.  I have the K3 set for VOX.   Intermittently, the K3 goes
into transmit mode without sending tones from the computer.    If I turn
down the mike gain (set at 8) the problem goes away, but then I don't get
audio into the radio.  What am I doing wrong ??

Rich W3ACO

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[Richard Ferch]

Rich,

Have you tried reducing the VOX sensitivity (MAIN:VOX GN)? The output
from your sound card in digital modes should be high enough to give you
4-5 bars on the K3's ALC meter, which should leave you with plenty of
headroom to set the VOX sensitivity below the digital audio and above
the sound card's noise level.

Could it be Windows sounds that are triggering the VOX? If so, you need
to disable them.

If the VOX is triggering with no output from your digital mode software
and no Windows sounds, perhaps it is triggering on noise from the
microphone. Can you disable the sound card's microphone input when you
are using digital modes? Or, if that is not feasible, can you reduce the
sound card's microphone input level enough to avoid spurious triggering
while still leaving the wav input high enough to give you the desired
4-5 bars of ALC meter reading in digital modes?

If none of these suggestions work, perhaps you will need to consider
using PTT.

73,
Rich VE3KI

W3ACO wrote:

> I seem to have a problem setting up my K3 for PSK and RTTY.  I use a
> computer with mike input and headphone output to connect to line out and
> line in of the K3.  I have the K3 set for VOX.   Intermittently, the K3 goes
> into transmit mode without sending tones from the computer.    If I turn
> down the mike gain (set at 8) the problem goes away, but then I don't get
> audio into the radio.  What am I doing wrong ??
>

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[Mike Reublin]

Or add a second sound card. The USB ones are quite inexpensive.

73, Mike NF4L

On 10/19/2010 10:42 PM, Richard Ferch wrote:

> Rich,
>
> Have you tried reducing the VOX sensitivity (MAIN:VOX GN)? The output
> from your sound card in digital modes should be high enough to give you
> 4-5 bars on the K3's ALC meter, which should leave you with plenty of
> headroom to set the VOX sensitivity below the digital audio and above
> the sound card's noise level.
>
> Could it be Windows sounds that are triggering the VOX? If so, you need
> to disable them.
>
> If the VOX is triggering with no output from your digital mode software
> and no Windows sounds, perhaps it is triggering on noise from the
> microphone. Can you disable the sound card's microphone input when you
> are using digital modes? Or, if that is not feasible, can you reduce the
> sound card's microphone input level enough to avoid spurious triggering
> while still leaving the wav input high enough to give you the desired
> 4-5 bars of ALC meter reading in digital modes?
>
> If none of these suggestions work, perhaps you will need to consider
> using PTT.
>
> 73,
> Rich VE3KI
>
> W3ACO wrote:
>
>> I seem to have a problem setting up my K3 for PSK and RTTY.  I use a
>> computer with mike input and headphone output to connect to line out and
>> line in of the K3.  I have the K3 set for VOX.   Intermittently, the K3 goes
>> into transmit mode without sending tones from the computer.    If I turn
>> down the mike gain (set at 8) the problem goes away, but then I don't get
>> audio into the radio.  What am I doing wrong ??
>>
> ______________________________________________________________
> 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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