cyberdad said:
Off the top of my head here in the Chicago area my list would look like this....
560: WIND off. I'd want to see if I could bag either WFIL, WQAM, or WHBQ....three legendary vintage rockers. I'm pretty sure I have heard WHBQ once or twice when WIND was off. I've also heard CFOS and most frequently KWTO. I've also heard KLZ not far west of here. Still, the channel is relatively open when WIND leaves.
670: When WSCR has been off, I've heard Cuba roar in. I'd be more interested in in KBOI and even more interested in KNBR on 680. Actually, 680 would be where I'd be more interested in hanging out. Looking also for CJOB, CFTR, WPTF, KFEQ, and whatever else might be out there.
720: WGN off. I've never heard KDWN here, so that would be my main target. KSAH would be another interesting catch. Way, way back in the day when they would go off on Monday mornings, Cuba would usually come through.
780: WBBM off. This almost never happens. I've never heard KKOH, but I wouldn't really know what to expect. CKSO used to put a strong enough nighttime signal here to crash through the splatter on 790. Now that they're permanently off, I'd be curious to hear what might surface there.
890: WLS off. As is, they're not strong enough to completely wipe out Cuba. But with the channel cleared locally, it would be interesting to see which of the "new" 890s might turn up.
1000: WMVP off. As stated earlier, XEOY underneath isn't uncommon. With WMVP off, the big prize would be KOMO, but I'd also be looking for KTOK. I'd expect both of those to be tough.
March 10th, 2012 saw a highly publicized and rare event take place: 670 WSCR, 720 WGN & 780 WBBM all went off the air simultaneously for a scheduled maintenance event. These three Chicago super pests completely dominate their respective channels at this location, day or night, I can't escape them even when using my antenna phaser. Since DXing, this is my first experience with WGN & WBBM off the air. I recorded the two hour event with my SDR and it was quite a site seeing all three of these big guns go silent from the airwaves one-by-one. Here's a spectrogram showing the stations going dark:
http://amdxer.com/misc/CHICAGO_OFF_10MR12.jpg The time is shown on the left side of the graph (0800-1000 UTC) while the frequency scale is shown at the bottom of the graph (620-820 KHz). The vertical bluish colored lines are AM signals showing modulation on each frequency. WSCR is the first to drop off, followed by WBBM and then finally WGN - all clearly seen on the spectrogram.
This is what I was hoping to catch during the Chicago down time:
670: The KBOI DX test that ran when WSCR was off. Westward conditions were bad that night and I never heard the test. It would have been nice to log a new state :-(
720: I was hoping to catch the Nicuarguan station here. It's been heard several times by others in the North and I thought I'd have a good shot with WGN off, but I never heard it. I was also looking for KDWN, but again the Western path was non-existent that night.
780: KKOH would have been nice, but it was non-existent too.
So what
did I hear that night? Here's the list:
670: Two different Radio Rebeldes, sightly out of sync with one another, not too exciting.
720: XEDE "La Kaliente" (new @ 1,480 miles)
720: XEAVR Radio Fórmula (new @ 1,762 miles)
780: XEMTS Radio Fórmula (new @ 1,595 miles)
780: XEWGR (new at 1,411 miles)
700 XEDKR "Radio Red" was also heard completely over WLW at one point during the Chicago outage, not a new log but a nice catch at 1,846 miles.
So, not a total loss, but I was really hoping for the western stuff!
Yes, I'd like to catch 1000 WMVP off the air some night too so I'd have a shot at KOMO.