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![]() wrote in message oups.com... I will have to find the link, but last night I was digging around in their technical archives and I found a statement to the effect:"All domestic AM BCB transmitters shall use a 75Us preemphaisis." I was looking for the maximum analog BW a AM/MW station could use." My information might be outdated. Subjectively, though, I think I hear differences in different stations. I suppose other factors in the processing might account for any differences. In the good old days class A stations could go with, I think up to 15KHz BW. I didn't feel like going to my parents and digging through the 1955~1970 Popular Electroncs that had an article on this issue. I'm almost certain that's true. Even 10 kHz of good audio isn't bad, but I don't hear much of that nowadays. I am trying to decide if I want to add a ~10KHz ceramic filter to my outboard detector. That only allows 5 kHz for normal DSB AM. Will you be limiting the wideband demodulation to the sync detector? [snip] Frank Dresser |