You might be interested in this post, Jim: http://owenduffy.net/blog/?p=2501
"... The Signalink USB turned out to be a disappointment for several reasons but the main one was that the noise floor was almost 20dB higher than an ordinary $10 Creative desktop sound card. ... "QST recently carried a modification which does improve the noise floor, in my case by 10dB. ... The modification reduced the noise floor from -71dBfs to -81dBfs, and although it is still high compared to a $10 creative sound card at -89dBfs..." I'd like to find out what Creative card that was, because I need a second sound card in my shack PC. 73, Mike www.w0btu.com On Mon, Sep 1, 2014 at 2:38 PM, Jim Brown <j...@audiosystemsgroup.com> wrote: > On Mon,9/1/2014 12:30 PM, Larry wrote: > >> Be very careful about audio levels. >> > > Also, use a good A/D converter to get the RX audio into your computer. > Several good, inexpensive USB sound cards are listed on my website. > Switching from the mic input of my laptop to these units allowed me to > reliably decode signals 12 dB deeper into the noise on JT65. > > http://k9yc.com/USB_Interfaces.pdf > > 73, Jim K9YC > _________________ Topband Reflector Archives - http://www.contesting.com/_topband