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Arrl, the national association for amateur radio 225 main street newington, ct, 06111-1400 usa tel fax toll-free hqarrl. Org contact arrl the arrl is a member-society and international secretariat of the international amateur radio union. Psk, rtty, mfsk, jt65, jt9, ft8, ft4 & js8call frequencies - sv1grb amateur radio website. Us amateur radio bands allocations 160 meters general advanced extra cw, rtty, data, ssb(phone), image 1. When youre getting started, remembering where youre allowed to operate is important. As a technician licensee, you have free access to all amateur frequencies above 50 mhz, but what about on the shortwave high-frequency (hf) bands? This chart helps you follow the rules. 149 from wrc-07, these band segments are also used for radio astronomy. Amateur use of these frequencies should be first coordinated with the national science foundation (esmnsf.). Amateur radio band amateur radio band frequencies where rtty transmissions can be found. 160 metres there is little rtty activity on this band, but what little there is can usually be found on frequencies between 1. the ft8 protocol is implemented in several application programs including the popular weak signals software wsjt-x , jtdx and the chat ft8-based software js8call that implement a different modulation and can be found in different ft8 frequencies.