"Amtor" existed long before it was a legal mode on Amateur radio as "SiTOR", (Simplex Teleprinting over Radio" ) on commercial maritime circuits. To my knowledge, there is no basic difference between Sitor and Amtor. Only the name is different.
I remember when working for Microlog Corp back in the 70's, when we were developing the SiTor terminal programs, we'd (illegally to be sure) fire up the TR-7 on the marine 12 MHz band and call marine coastal stations to check out our operating program, asking for radio reports etc. We knew most of the ops, so nobody cared too much. Especially if the network was quiet for a while before we called. Curiously, the TR-7 IS fast enough to successfully operate Mode A Amtor. Since there was a several month lead time for ads in QST, I remember getting the inside scoop that the FCC was about to OK the use of both Mode A (hand-shake) and mode B (Forward Error Correction) Sitor, or Amtor if you please on the HAM bands. The ad was scheduled to come out in the issue of QST, the same month the FCC OK came out. This was the "Now, you can chirp back." Ad and boy was I sweating bullets that the OK would in fact come out in time. Luckily for me, it did so I avoided a huge "egg-in-the-face" situation. It was quite a challenge back then to find radios that would switch (from full power transmit to full sensitivity receive) fast enough to run mode A. This was not break-in CW because almost all the programs used AFSK with the rigs in SSB mode. Seems like a century ago...... 73, Charlie k3ICH -----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Stephen Prior Sent: Saturday, November 28, 2015 10:04 AM To: Elecraft <Elecraft@mailman.qth.net> Subject: Re: [Elecraft] LDEs (Long-Delayed Echos) Yes, he's also the originator of the amateur form of AMTOR and PSK31. 73 Stephen ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
