Sure the rules apply, and rules for spectrum bandwidth provide no numbers, saying only "... in accordance with good amateur practice."
Right now, New Year's eve, there is an on air event taking place, Straight Key Night, that encourages the use of antique rigs on the air and is sponsored by the largest association of Radio Amateurs in the USA, the ARRL. Amateur radio is still a homebrewer's hobby, encouraging Hams to design, build and maintain their own rigs frequently without access to modern equipment to evaluate their performance. I believe it is for that reason the rules are very loose about things like spectrum bandwidth. 73, Ron AC7AC -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Jim Brown Sent: Thursday, December 31, 2015 3:27 PM To: [email protected] Subject: Re: [Elecraft] Elecraft gear relative IMD On Thu,12/31/2015 3:07 PM, Ron D'Eau Claire wrote: > The same is true for Ham rigs. It's perfectly okay to run an old > Heathkit > AT-1 or a 1930's homebrew rig with cathode keying today as it was back > then, even though the keying bandwidth will be substantially greater > than modern rigs. WRONG! The rule about bandwidth governs. > The bottom line is to make sure the rig you have is being operated to > produce the cleanest signal its design allows in the mode of operation > being used. The rule says NOTHING about the design of the rig. It speaks ONLY about the means of transmission, which refers to the communications mode (CW, SSB, FM, RTTY, PSK, etc.) > That's why double-sideband amplitude modulation is still legal even > though it requires more than twice the spectrum of an SSB signal and > CW is still allowed even though SSB and the various digital modes > provide the same information in yet smaller bandwidths. WRONG. Double-sideband AM with a carrier is legal because it is a DIFFERENT mode permitted by the FCC Rules. (A3 is the FCC designator). SSB is J3 if the carrier is suppressed. CW is A1. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
