[Elecraft] KX3 PSK

[Don Wilhelm]

John,

Are you using isolation transformers (galvanic isolators) between the 
KX3 and the sound card?
That may help.  The alternative to galvanic isolators is to tie the 
grounds of both the KX3 and the computer together with heavy wire (or 
copper braid)  Be certain that the power supply to the KX3 is included 
in this bonding - the bonding should be from each device to a single 
point ground.

Yes, I know that laptops with plastic cases are difficult to find a good 
place to connect the bonding strap - in that case, the galvanic 
isolation is the easiest solution.

73,
Don W3FPR

On 3/1/2013 7:17 PM, John Griswold wrote:
> I am using DigiPan to play PSK31 with my KX3. In the DigiPan 
> waterfall, it looks as though someone has dragged a comb through it, 
> with trace alternating with dark space showing no signal. I went 
> through the menu changes I had made, and when I toggle between Dual RX 
> Off and Auto, the PSK display changes. I have posted a picture 
> http://www.kk1x.net/photos/psk.jpg for those interested.
>
> I'm curious to know why this is - now that I know why it happens, I'm 
> pleased, but I wonder if anybody on the list could explain it to me.
>
> Thanks & 72,
> John KK1X
>