> > How is it too late? Also can they add more power to both
> > stations?
>
> Short-spaced allocations came to a close in the 60s, where
> stations on second adjacent channels (0.4 MHz from other
> stations) were able to move fairly close into Chicago.
> Today, there are also first-adjacent stations on 92.1, 92.5,
> 106.1 and 106.5 near enough to Chicago to firmly lock WPWX
> and WSRB in their locations. The same is the case for 106.7
> WPPN, which has an allocation similar to 92.3 where it's 0.8
> MHz from other Chicago stations, yet WPPN is stuck in Des
> Plaines.
>
> Add power? Nope. WPWX is already at 50,000 watts which is
> the max. Without checking distances to other stations,
> WSRB's only chance to raise power is if they lower their
> antenna height, and tower height always trumps power. As an
> example, 10 watts @ 1,000 feet goes a lot farther 1,000
> watts @ 10 feet.
>
> 92.3 has strong signal over the southern half of the City of
> Chicago. 106.3 has good signal over the south 1/3 of
> Chicago. That is reason enough for Crawford to advertise
> for both stations in Chicago. 107.9 WLEY is a suburban
> signal, yet it seems they've overcome that adverse situation
> quite well.
>
WSRB is maxed out because they're short-spaced to co-channels WGCY Gibson City to the SW, 2nd adjacent WPPN Des Plaines, and that's because they signed on under the current rules, which is why there's a null to the north & NW. They're already short-spaced with WCKG, so that isn't a factor. They're also short-spaced with WUBU South Bend, which is why there's a big null to the east. I know along US 30 outside of the Valparaiso city limits, there's plenty of bleedover from both WUBU & WSRB. So if Crawford were to want to serve more of the Chicago market with Soul, they could try to make an offer to Nextmedia for 102.3. I don't know if that signal can be upgraded any further, but I already know it's short-spaced with Milwaukee's 102.1 WLUM, plus Chicago's 101.9 & 102.7.
As for WPWX, they're short-spaced as well: WDEK on 92.5 to the west, 92.7 to the NW & SW, but I believe WKIF signed on under the current rules, while WKIE I believe is a pre-1964 since it's short-spaced with WXRT, & WDOW on 92.1 in Dowogiac Michigan. If 92.3 could be moved to the city, it would be even tighter as they would have to put a bigger null to the east to protect WDOW, but then they would have to protect WEZY Racine Wisconsin. They would have a null similar to WDRV to the north to protect 1st adjacent. So 92.3 is best to stay where they are.