jboyd said:The FCC is now proposing to require reporting of all off air intervals over 30 days in each renewal period, so they can determine if they should investigate further...in other words, operating a few days each year would no longer give you an automatic pass at renewal time. Will be interesting to see how this goes down. IMHO...the FCC wants to eliminate the AM band.. especially daytimers...thoughts?
jboyd said:The FCC is now proposing to require reporting of all off air intervals over 30 days in each renewal period, so they can determine if they should investigate further...in other words, operating a few days each year would no longer give you an automatic pass at renewal time. Will be interesting to see how this goes down. IMHO...the FCC wants to eliminate the AM band.. especially daytimers...thoughts?
the golden boy said:I think one thing that hurts 780 is that they have to go off the air at night to make room for WBBM-AM Chicago. I have nothing against WBBM, as they're one of America's radio powerhouses, but they have no interest in serving Jackson, MS, or any other place outside the Chicago area. Maybe WBBM should power down at night. I know it would perhaps mean not hearing those far-away AM stations at night, but why should smaller markets make room for the big cities?
w9wi said:the golden boy said:I think one thing that hurts 780 is that they have to go off the air at night to make room for WBBM-AM Chicago. I have nothing against WBBM, as they're one of America's radio powerhouses, but they have no interest in serving Jackson, MS, or any other place outside the Chicago area. Maybe WBBM should power down at night. I know it would perhaps mean not hearing those far-away AM stations at night, but why should smaller markets make room for the big cities?
Thing is, doing that (requiring WBBM to reduce power at night and allowing WIIN to operate after sunset) would create massive interference issues *in Chicago*.
Firstly, Chicago is one of the geographically largest markets in the U.S.. WBBM *needs* 50,000 watts to provide reliable coverage of places like Joliet, Gary, and Waukegan. Requiring a power reduction will leave the station unable to cover the Chicago market, let alone anywhere else. Requiring a nighttime directional antenna instead of a power reduction would save the north and west suburbs but leave places like Joliet and Kankakee uncovered.
It could actually happen accidentally,since those two switches behind the chair could be flipped wrong at power reduction time, causing the directional signal to stay at 5kw, and sending a solid signal into New Orleans,for example. Got a nice postcard from there once.robgrayson said:It was another time, fewer signals, etc. blah blah blah, but anecdotally there was a certain Jackson 5 KW AM which, for a short while, allegedly was going full day power at midnight. "Working on the transmitter", you know. And, anecdotally, they were getting requests from California.
I wasn't there, so I don't know first hand, but it makes a good story (depending on the statute of limitations).
The WIIN 780 Class-D facility near Ridgeland Ms falls well inside the 0.5 mv, 50% *sky wave* contour of WBBM Chicago. Current FCC rules state in §73.25 and 73.182 that no other night time authority can exist inside this contour. All medium frequencies are diurnal (different day and night) in their propagation characteristics. Different math is used to calculate interference levels for day and night respectively. In short, a relatively low power transmitter located hundreds of miles away from a high-power facility can indeed destroy the local coverage area of the class “A” facility. "what-ifs" outside of long-standing CFR is pointless....the golden boy said:w9wi said:the golden boy said:I think one thing that hurts 780 is that they have to go off the air at night to make room for WBBM-AM Chicago. I have nothing against WBBM, as they're one of America's radio powerhouses, but they have no interest in serving Jackson, MS, or any other place outside the Chicago area. Maybe WBBM should power down at night. I know it would perhaps mean not hearing those far-away AM stations at night, but why should smaller markets make room for the big cities?
Thing is, doing that (requiring WBBM to reduce power at night and allowing WIIN to operate after sunset) would create massive interference issues *in Chicago*.
Firstly, Chicago is one of the geographically largest markets in the U.S.. WBBM *needs* 50,000 watts to provide reliable coverage of places like Joliet, Gary, and Waukegan. Requiring a power reduction will leave the station unable to cover the Chicago market, let alone anywhere else. Requiring a nighttime directional antenna instead of a power reduction would save the north and west suburbs but leave places like Joliet and Kankakee uncovered.
How about this: rather than WBBM reducing power at night, how about just using its daytime signal? WBBM (as well as WGN and WSCR-670) can get quite deep down into Illinois during the day. You can get get an audible signal (albeit quite scratchy) down to about the Marion/Mt. Vernon area, so it's not like the cities you mentioned would get left out of coverage. But going by what you said, could WIIN still cause interference at night? I'm not the most technically savvy when it comes to broadcasting technology, so it's kinda hard for me to grasp such concepts.