Aside from the usually-atop WWRL NYC at night, 1600 has been a SSS frequency here; 4 or 5 such catches. An odd nighttime one was WNEV from Wheeling one eve, playing the standards, perhaps still on day power.
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Some notes on WWRL NYC for anyone not from the area but DX-curious:
For the longest while, The Big 'RL was 5000 watts, U-4, directional day and night with only a slight variance in the two patterns. Their 4 sticks directed a bullhorn laser, apocryphally 4999 watts worth, straight down Flatbush Avenue in Brooklyn. There were huge, imploded nulls pulled in from the SW and NE, as seafood in parts of the North Atlantic was getting pre-heated for the Fulton Fish Market.
Perhaps the best non-techie AM DXer of his age -- Ernie Cooper ; some here will remember him -- lived a block off Flatbush, perhaps at zero coordinates of whatever WWRL's effective radiated signal was directed. 1600was a day and night blur of white noise in his den.
In the meantime, elsewhere, daylighter 1590 WERA Plainfield NJ to the southwest was on the air, ITS signal covering a good half of Staten Island -- one of the 5 actual NYC boroughs. In the opposite northeast direction, WLNG 1600, a 500-watt daytimer, came sailing 100 miles down Long Island Sound to put a daily, listenable signal into the coast of the north Bronx -- another of the 5 NYC boroughs.
Cooper, with his HQ-180 and a loop our crew helped him build, spent many hours trying to log that WERA from Plainfield, to no avail. Even their monthly frequency check wouldn't make it the 25 or so miles to his place. Too much WWRL.
We four DXer kids near JFK Airport, meanwhile, on the other side of and out of range of WWRL's white noise air horn, could easily hear WERA Plainfield, using worse radios (I distinctly remember hearing WERA run a spot for a restaurant called Wally's On The Hill). Dunno if 'ERC', as he was called, ever heard WERA before he retired and moved to Cape Cod.
Footnote: Some optimist in Port Chester NY, just on the NY side of the NY-CT border along the Sound, got a construction permit (1970-ish?) for a 1590 station called 'WNJZ'. At the time, that would have been in the mutual null between 1590 Waterbury CT and WWRL. Nothing ever came of the CP, though. The best it did was further illuminate the thorough absence of WWRL's daytime signal.
The Big' RL bought out Plainfield 1590 and Sag Harbor 1600 (and iIrc Waterbury 1590) to get some daytime room, and went to 25,000 watts. But from what I see from even the Canadian CRTC maps, the 5000 watt nighttime pattern looks the same as it did back in the 60's and 70's
It is sort of odd that WWRL (and 1010 WINS) frequently get heard a lot further away to the west than their charted nighttime signals say they should go.