Contact by email : operator 'addsign' pa7x.nl (replace 'addsign' by @)
Contact by radio :
By Repeaeter Den Helder PI2RDH (430.2625 Rx, 431.8625 Tx, 88,5 CTSS)
14.255 Mhz for long distance contact
Also active with D-STAR (DCS007 B) and DMR modes (TG 204, Netherlands).
As from 1st of July 2019 on es Hail satellite (10Ghz down, 2.4 Ghz up)
Listening airtraffic with ASD-B on 1.090 Ghz