Curt,
Most any interface box will work with the K2 if you use the headphone
output and mic input - even homebrew. PTT can be derived from a USB to
serial adapter and a "one transistor keying" circuit. Take a look at
my website www.w3fpr.com for the K2 Fixed Audio Output article and the
Switchbox for Digital Modes article. It may be possible to use the
laptop soundcard, but external soundcards are easy to use and inexpensive.
You do not need the Compression Disable part of the switchbox article if
you turn on RTTY mode and set up the filters just like your SSB
filters. With RTTY mode, the compression setting is independent of the
setting used for SSB -- Compression must be at 1-1 for data modes.
You can find an updated circuit for the Fixed Audio Output at the newly
mirrored N0SS website
http://www2.opparc.org/mirrors/n0ss/www.n0ss.net/wsdindex.html. Boards
are no longer available, but the circuit is simple enough to construct
on perfboard.
73,
Don W3FPR
On 11/21/2013 7:49 AM, Curt wrote:
For some reason I've become interested in trying PSK31 with my K2/10.
Receive works well, but haven't tried transmitting yet because my
laptop has only USB connectors. Before buying an interface, would
appreciate knowing whether others have had success with QRP level
PSK31. Which interfaces play well with the K2?
73, Curt KB5JO
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