[Elecraft] K2 & PSK-31

Rod N0RC [email protected]
Sun Jan 19 10:09:00 2003


Folks,

I read the PSK app note: http://www.elecraft.com/Apps/PSK31_2.PDF but
still have questions about setting the TX audio level.

I'm using a cable as described in the appnote, and I am using VOX (0.4
setting) for TX/RX mode switching; software is Digipan; Pout is set for
5W; SSB A = 2; SSB C = 2:1.

With the K2 in RF out mode: As I advance the soundcard volume the power
quickly jumps from 0 to 5 watts, I believe this behavior is a result of
the tracking ALC of the K2.

With the K2 in ALC mode: As I advance the soundcard volume I can adjust
for 1 ALC bar or 2 ALC bars. I can even set the audio so that the second
bar is flickering somewhat.

Is there a more refined way to set the K2 for good PSK performance?

Based on reports received from others, I believe this config to be
optimal:

    Pout <= 5W
    SSB A = 2
    SSB C = 2:1
    Audio-in level set so that the second ALC bar flickers

Is there something I've not accounted for?

73, Rod N0RC
Elecraft CC: 0 of 100, started 05-Jan-2003