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'DAYTIMERS' (incl. WJIB-740) GETS HIGHER POWER for 2 hours after sunset.

J

JIBGUY

The FCC has just released new pre-sunrise powers and new post-sunset powers for lowly AM daytimers! - For some stations, its an improvement, and for others it's worse.

WJIB-740 now get 40 watts for pre-sunrise (previously 5 watts at pre-sunrise); and for post sunset, WJIB-740 gets to stay on with full 250 watts until two hours after sunset; which in summer is 10:30 PM.

WJTO-730 in Maine gets a reduction of pre-sunrise power from 84 watts to an average of 15 watts, BUT gets to stay on 2 hours past sunset with 500 watts! ('daytime' power is 1,000 watts).
 
If I were you, Bob, I would not plan any celebrations just yet. I do not understand the rationale behind these adjustments and I can believe that the Funny Cookie Company will issue corrections by and by. OTOH, I read that if you have the original PSRA and PSSA in your posession and if, at any time, they allow power greater than is shown in these new calculations, you can continue to use the higher power during the hours when the old PSRA or PSSA allows it. That may or may not be true, but I DID read it. If that's correct, both WJIB and WJTO win at each end of the day. Have you talked with Rob Rudnick? Did WNTN make out at all? Did WILD get any useful pre-sunrise power? What about WSRO? Supposedly the values for all affected stations are SOMEWHERE in CDBS and if you know where to look, you can check them out, but I read that the info is not easy to find and nobody has offered directions on where to look.
 
The timing is interesting: a week from Sunday, AM stations around here that just started to broadcast with daytime facilities at 6:00 am will have to revert back to 7:00 am for the rest of March. Do these rules take effect immediately? And how about the CH rules for full-timers like WWZN?
 
Laurence Glavin said:
The timing is interesting: a week from Sunday, AM stations around here that just started to broadcast with daytime facilities at 6:00 am will have to revert back to 7:00 am for the rest of March. Do these rules take effect immediately? And how about the CH rules for full-timers like WWZN?
Click to expand...

I've heard nothing about ANY change in the Critical Hours rules. CH still extends from local sunrise until two hours after local sunrise and from two hours before local sunset until local sunset. PSRAs cover from 6:00AM current local time until local sunrise. PSSAs extend from local sunset until two hours after local sunset. Under special curcumstances, however, PSRAs and PSSAs can cover shorter time spans. Trying to state the conditions under which the durations of PSRAs and PSSAs are shortened is such a complex endeavor, I gave up on it. It would take a posting of Brobdignagian length! The factors that make stating the fules so difficult are a) Is the Class D station co-channel with a Class A AM? b) If so, is the Class D inside or outside the Class A's protected (normally 0.5 mV/m 50% skywave) contour? c) Is the the Class A in the US or is it in some other Western Hemisphere nation? d) Is the Class D east or west of the Class A? One could probably use these questions to construct a decision tree, but each box of the tree would contain a lot of text.
 
It takes effect on March 11, 2007 or whenever each DAYTIMER station notifies the FCC that they will use the new granted powers; whichever is later.
 
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