[Elecraft] Precautions or hints on use of Signalink USB with the K3 for PSK31 and JT65A digital modes

[Robert Nobis]

Hi Rick,

Thank you. When I ordered my K3 I ordered the TCXO option, as I was
planning on eventually trying the digital modes. Just wondering, what
software do you use for the JT modes?

73,


Bob

On 1/19/14, 11:04 PM, "Rick Bates" <happymoosephoto at gmail.com> wrote:

>I've found it best to use minimal K3 output (Lin Out 1) and maxing the
>levels on the SLUSB drivers.  Ideally, you want a sprinkling of snow on
>the
>waterfalls, not a blizzard.  I also max the driver TX level then adjust
>the
>Data A level to the proper level.  The knobs on the SLUSB are kept at noon
>unless you need a finer tuning for current conditions.
>
>If you see 'echoes' (harmonic related) of a strong signal on the
>waterfall,
>you're overdriving your input; not to be confused with IMD (shadows) being
>sent by some when THEY are overdriving their audio.
>
>It's also a great tool for operating remotely by routing Skype audio
>to/from
>the SLUSB and NOT getting OS sounds (or ring sounds) accidentally sent out
>on the air.  
>
>You may have small issues on the JT modes if you do not have TCXO as the
>transmitter heats up (slight freq drift).  I've always had the TCXO, so I
>can't confirm that.  Others may comment about that.  The slower the shift
>rate, the more critical the frequency accuracy is.
>
>Thankfully, the line TX setting is separate from the Data A TX level
>setting
>which is also different from the Mic settings so you don't have to
>(remotely) reset the levels each time you change modes.  Great job
>Elecraft!
>
>73,
>Rick wa6nhc
>Cameron Park, Ca
>
>-----Original Message-----
>From: Jim Bennett
>
>Hi Bob -
>
>I've used the SLUSB on both a K3 and a KX3 with success. The K3 had it
>hooked to a MacBook AIr laptop; when I moved the SLUSB to my KX3, I hooked
>it to an iMac. Nothing special needs to be done on the K3. In my case I
>ran
>native in the Mac OS X environment. For PSK31 I used cocoaModem and for
>JT9
>and JT65 I used WSJT-X. Both apps work very well on both the K3 and the
>KX3
>and both Mac hardware platforms. Again, nothing "tricky" about using the
>SLUSB and the Mac. The "trickyness" comes with the software apps you will
>be
>using!!! If your shack experiences any sort of RFI from common mode RF, it
>can affect the SLUSB. I had that issue and resolved it by winding the USB
>cable through a 2-1/4" mix 31 donut several times. Of course, getting rid
>of
>the common mode RF is the best solution... :-)
>
>Jim / W6JHB
>Folsom, CA
>
>
>On   Sunday, Jan 19, 2014, at  Sunday, 7:48 PM, Robert Nobis wrote:
>
>> I have ordered a Signaink USB for use with my K3, primarily for PSK31
>>and
>> JT65A operation, and expect delivery on Monday.
>> 
>> Does anyone have any precautions or hints on proper setup of the
>>Signalink
>> for use with the K3?  I use Windows 7 running on a Mac under VMWare
>Fusion.
>> 
>> 73,
>> 
>> 
>> Bob - N7RJN
>
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