[IRCA] KKOB Santa Fe

["John Callarman" <JohnCallarman@xxxxxxx>]

Noted an interesting problem for KKOB while on our way out of Santa Fe Tuesday morning, where we'd spent the night with a brother-in-law on our way back from Arizona. A dominant cyclical sound from what appeared to be a subaudible heterodyne, presumably from the synchronized 230-watt transmitter on the west side of Santa Fe. (NRC log says night-time only, but FCC data base shows as unlimited.) I counted the cycles ... 120 in 60 seconds, indicating, if my fuzzy understanding of SAHes is accurate, that the Santa Fe transmitter and the Albuquerque transmitter are 2 Hz off. It was extremely annoying, and and carried as far south as milepost 277 on US 285, about 25 miles from the Santa Fe transmitter.

I had heard a similar effect 25 to 30 years ago when I was at WMIX-940, weather knocked off the daytime transmitter, and we switched to the night-time facility. When the power went back on at the daytime transmitter site, the combination gave the same cyclical, wobbulating effect.

My SAH assumption, though, may be wrong, if the effect was caused by the difference in distance between the two transmitters. Engineering knowledgeable people may set me straight on this.

The bottom line, though, would seem to be that the product of the two transmitters would make KKOB's programming unusable within a 25-mile radius of the Santa Fe transmitter.
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
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: irca@xxxxxxxxxxxxxxxx