"Thanks for the quick reply -- In all fairness, you should know that I am a telecom technologist making informal observations on this new phenomenon - as well as being an avid listener of AM radio outside of the stations market areas.
In this particular example I note that AM 1200 in Vancouver is taking a significantly lighter hit of digital hash than KOFI in Kalispell, Montana on 1180khz. When I checked KOFI last night, the hash appeared to be about 8 to 12db down from KOFI's average level (on a very well calibrated S-Meter on a Drake R8 Communications receiver fed by 2 Wellbrook ALA100 loop antennas phased with an active phasing unit) My dual loop system gives over 30db in nulls under normal circumstances -- On 690khz for example, I can null a 50kw station located in Vancouver B.C. into the noise revealed a station, XETRA in Tijuana, Mexico below. On 1200khz, the hash sideband appears to be about 12-16db down or better. The sound (of hash) is always present. Interestingly, on some phasing positions from my end you can hear digital hash underneath KEX's main signal -- which is normally quite pristine with very little multipath distortion or single-hop fading. The receivers that I use here also have selectable synchronous sideband capability so you can kill some of the hash by locking into the sideband furthest away from the offending station. To get a more comprehensive sense of the impact that this new medium is having on the average listener I am also using a few "above average" table top radios - And yes, they are all effected a little differently. The proof I think will be in: a.) the amount of consumers that buy HD radios and b.) the number of standard analog consumers on the fringe of your market that complain about reduced audio quality. All in all, it will be fun to watch! " -- Colin Newell - Editor/Creator - CoffeeCrew.Com | DXer.CA _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
