[Elecraft] [K2]PSK31 QRP?

[Fred Smith]

The SignaLink USB units work very easily with the K2 all you need is an USB
port on the computer it has its sound card built in it.

As far as QRP and digital modes they made for one another.



73,
Fred/N0AZZ
K3 Ser # 6730--KX3 # 5210--K2/100 # 6470-KAT100
P3/SVGA--KAT500--W2
Amps Elecraft KPA500 HF/6m--Alpha's 9500 HF--87A HF--Mirage B-5030-G
300+w--(2) B-5016-G's 165w 2m

 
-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Don Wilhelm
Sent: Thursday, November 21, 2013 7:23 AM
To: Curt; elecraft at mailman.qth.net
Subject: Re: [Elecraft] [K2]PSK31 QRP?

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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