Proposed frequencies for PSK31 QSO
- The plan for PSK31 activity has always been (since PSK31 started) to concentrate activity starting from the bottom edge of the IARU RTTY bandplan, expanding upwards as activity increased. The exception is in the 10mts band in order to give non full privileges ham to meet. It was defined as 150 Hz above it. Keep in mind that all you need is about 100 Hz as channel separation. 
- These recommended frequencies are in accordance with the IARU bandplan for region 1. There may be differences for regions 2 and 3 
1838.150 
3580.150 
7035.15 for region 1 and region 3, and 7080.15 for region 2 * 
10142.150 
14070.150 
18100.150 
21080.150 (although most activity can be found 10 kHz lower) 
24920.150 
28120.150
* This is due to the fact that the 7 MHz band is much wider in region 2 (the Americas), and the IARU bandplan reflects this.