[DavGoodlin]

In SE PA, 100+ miles from both NYC metro and Wash DC, with decent regular reception from Baltimore's 2-11-13 at 75 miles to SW, either set of big-city channels 2-4-5-7-9-11-13 could be received on summer mornings/after sunsets during heatwaves.

A fast-moving thunderstorm rolling through brought out some incredible mid-Atlantic reception, but not anything from west and rarely from north. The rotor was very helpful in nulling out the co-channel using a JFD medium sized LP VHF only 10 feet above the roof.

Once while testing a smaller VHF antenna in the yard, WPBT-2 Miami over 1000 miles away, wiped out WMAR-2 one muggy summer morning in '78, later WPTV-5 in West palm beach showed up as I was afraid to turn the 19" GE BW off. No great reception equipment employed so it was deemed miracle it was then. What made it really odd was the usual co-channel "venetian blinds" and audible beat frequencies were absent.

Most cable companies in Eastern PA had issues with WTNH New Haven and WTIC Hartford messing with Philly's KYW-3, WPVI-6, WCAU-10. WHYY-12 had some areas N of Allentown receive its duplicate WBNG-12 Binghamton, received normally in most of NE PA.

WGAL-8 near my location, the only VHF channel between Philadelphia's quad and Altoona (10)-Johnstown (6 and 8)-State College (3). Those "upstate" Pa channels never interfered or were received in areas east of the Appalachians.