Chen, That's not so. Pactor-IV is not permitted in the USA *only* because its symbol rate exceeds 300 baud. There is currently no regulatoryBWrestriction for non-FSK digital signaling in the USA. The
There is a further "worry" that I have as digital technology marches forward. We're 50+ plus years beyond the introduction of simple amateur-RTTY, and rules have not kept pace with amateur practice.
Chen, In a fortuitous combination of insomnia, persistence and luck, I worked K5D (Desecheo Island) on 160 m SSB. So what's so special about that? I was pumping 100 W PEP into an inverted "L" in my a
Mark, Just my opinion, and not in any way complete. Painting with a broad brush, and using 20 m as an example, the following appear to be basics: CW to favor the lower portion of the bands, 14.000 to
In the Mon Dieux department, D-STAR users hold regularly scheduled D-STAR nets in the phone portions of the HF bands. Just look for the 6 kHz wide signals, or see http://www.dstarinfo.com/DSTARHFNet.
Dennis, If you ever find a solution to your #4, please let me know. So far as I know, only PSK31 modes (Digipan) and JT65/9 modes (WSJT) software automatically find decode multiple signals simultaneo
Dennis, Great question! See the second installment of RTTY articles by Irvin Hoff, K8DKC, "Operating the Teleprinter", QST, Feb 1965, pp 29-35. He wrote 13 articles in QST in 1965-66 on all aspects o
Peter, Hoff, K8DKC, also includes snippets about FCC regs regarding RTTY. You can follow why we are where we are with the FCC. I learned RTTY in the last 5 years from that series, this reflector, and
Terry Under current FCC rules, the 300 baud limit does NOT limit bandwidth except for two-tone RTTY signals. Note for example that PACTOR-3 occupies 2.2 kHz and uses a baud rate of 100. There is no B