I disagree. That doesn't match my experience at all or many of the other commenters on this board. 97.5 has been the worst of the eastern rimshots since they moved in. I can't remember a time when 97.5 was better overall than 103.7, including when it was AAA and Jack, back before EMF bought it.
Well, I can't help with short memories, but there was most definitely a time when 97.5 outperformed 103.7 before the KFTX repairs, and before EMF bought and made several improvements to 103.7.
97.5 is also substantially worse overall than the other eastern rimshots: 93.3, 98.5, 100.7, and 107.9.
Does having a co-channel with near-identical program audio help hide ducting sometimes? Probably, but that is not the primary reason 97.5 is perceived as being such a dog.
And for what it is worth, those other eastern rimshots are also, on the whole, pretty awful if you take the market dimensions into account. Very poor signals in the western half of the market where a lot of growth is happening.
I have zero doubt that 97.5 performs worse today than it did under Cumulus ownership.
I also have zero doubt that 103.7 performs better today than it did during Cumulus ownership.
I'd be willing to bet almost anything that 97.5 is still rocking along with the same Harris HT35 tube transmitters that were installed after the site was badly damaged by Hurricane Ike. I'd also say it's likely they're no longer tuned for minimum AM noise, and there may be other technical issues with the antenna system and/or transmitters.
On the other hand, EMF replaced the 103.7 antenna that was in place under Cumulus ownership, and I would be absolutely shocked if EMF is still using the Harris HT35s that were original to the facility. It's much more likely that they've installed a shiny, new Nautel solid state transmitter, like they have at so many other acquisitions. Those boxes are incapable of being out of tune, and they would produce a more stable signal than the Harris tube boxes on their very best day.
The antenna EMF installed for KHJK is tuned just for 103.7 and uses a power divider and matched lengths of transmission line going from the power divider to the antenna bays, so everything is phase matched. When every ounce of performance counts, this can make a difference.
The 103.7 antenna that was in place when Cumulus owned KHJK was broadbanded, and designed to accept everything from 94.1 to 103.7, which is how the 103.7 site became home to 97.5 for many months after Hurricane Ike badly damaged the main 97.5 site. Little known fact - Cumulus had aspirations of moving KQXY Beaumont to Devers and making it a Houston rimshot as well. I forget exactly where, but there was a blocking station that refused to downgrade or change frequency, so the KQXY move never happened.
The antenna for KFNC is either center fed or end fed (I honestly don't remember which) but it doesn't have phase matching advantages that KHJK does now.
So in a nutshell, 103.7 is equipped to perform better now than when Cumulus owned it.