Where to find Packet on 40 meter band (EU)

Many European stations run multiple modes as well as additional packet ’channels’ for BBS interlinks etc, these can be found only on the USB frequency as the multi modes such as VARA, ARDOP and Robust Packet are sideband sensitive and sit at a fixed center frequency of 1500hz.

7.0451 USB

The USB dial frequency of 7.0451 has been selected to keep the setup intact according to the 20m setup, some of the stations switch from 20m to 40m during the evening when propagation on 20m becomes difficult. The 40m frequency shown here is within the EU digital mode allocation, the US allocation is unfortunately incompatible because it is much higher up the band, you may find Net40 on 7.104 LSB (AX25 300 baud at 1700hz center frequency).

The various new-skool multimodes run at a fixed center frequency at 1500hz, with the packet channels described sitting on either side, depicted in this screenshot:

The multi platform ported version of UZ7HO soundmodem by G8BPQ.

You may want to try running QtSoundModem as it helps to visualise the spectrum with a waterfall.

Download QtSoundModem here.

Demonstration (no audio)