Fortunately the K3 is quite good on AM transmit, unlike legacy equipment often used. I don't know about elsewhere, but here in the UK there are 80m AM nets where some of the stations run original AM gear without any additional audio filtering, one was measured at +/- 12 KHz by a fellow ham with an SDR receiver. The operator seemed indifferent to the fact his transmission was excessively wide and carried on regardless. The guy who measured the wide signal used home built AM gear himself, but had a multi-pole active filter of a similar specification to that used by broadcast stations to achieve their "skyscraper" envelopes as seen on a panoramic adapter or SDR receiver.
The UK license has the clause "The bandwidths of emissions should be such as to ensure the most efficient utilisation of the spectrum". 73 Dave, G4AON K3/100 #80 Joe, W4TV wrote: Similarly, AM - except for legacy equipment - should be limited to 6 KHz bandwidth. In other words, the maximum modulating frequency should be set at 3 KHz - or no more than 3200 Hz. ______________________________________________________________ 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
