Originally Posted by mlmahon
Ditto. Pretty Ratty. All the fidelity of AM radio.
Problem with AM Radio is the RECEIVERS
..the transmitters can pass up to 50kHz but they are limited to 10kHz under FCC Rules these days...even so, I have several AM Stereo (yes there IS stereo on AM; longer than FM stereo has been around!) with selectable WIDE filters that make it sound as good as FM (In fact, AMs USED to broadcast wider bandwidth than FM Stereo...FM is limited to 15 kHz max to keep the 19kHz pilot from getting trashed....AM Stereo uses a 25HZ pilot instead and in the 80s, AM stereo systems were pushing 20+ kHz to the air...but AM rcvrs are filtered to maybe 5kHz to keep splatter from adjacent chanenls and to keep the hi end noise (hiss, ignition noise, etc) to a minimum...when 92.9 and 790AM in Houston were simulcasting the Q-ZOO in the 80s, I preferred listening to it on the AM! It sounded fuller and richer with the AM Stereo rcvr I have in the wideband mode...with the normal/narrow filter kicked in, you dont see much above 4 kHz audio out! IF the AMAX standards had been REQUIRED by the FCC (and with today's DSP horsepower), AM would sound as good or better than FM...
digital IBOC?? Forget it!! besides IBOC is dying a slow death on AM...FMs are still running it but I wonder for how long with the licensing fees hey have to pay to Ibiquity who holds the patents, etc!
BTW I have a rare SONY FM/AM stereo home tuner(along with my Sony XRA-33 car rcvr with cassette and a MetroSound AM Stereo tuner that has a built in FM modulator as well as line outputs)...This Sony home tuner was only sold in Canada and Australia...defaults to 9kHz steps but with a power on button sequence it tunes in 10kHz steps...doesnt cover Expanded Band (1610-1700) but on the 530-1600 range, and on wide band, you would be amazed how great AMs playing music sound (well if you can find them
If I can find a site big enough to handle an upload, I will post the WLS BIG89 Rewind from 2007..it was recorded off the over the air logger...which is an AM Stereo receiver! Yep, WLS still does CQUAM Stereo...and the digital MP3s sound fantastic with the processing, etc!