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]
