makrolab | contact information and interface how to contact makrolab qth-locator JO 40 SJ radio beacon 144.9625 MHz for the moment inoperational call sign DH / S57NTS in kassel area: fm radio on the frequency 149.050 MHz in documenta halle: the radiotelephone at makrolab console radio news on HR2: every week, Thursday 12:00-13:00 before attempting radio contact, please fill in the id form. contacting times for today date 0907997 time 15:30 CET - 16:00 CET session 1: 15:30 CET - 16:00 CET session 2: 18:00 CET - 18:15 CET email MAI send email to makrolab crew