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Old June 26th 05, 07:33 PM
Frank Dresser
 
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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My information might be outdated.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