Joe,

I don't know where you are located, but here in CT (about 120 miles north of
NYC, I often get a music station right under WABC. I've usually heard oldies
but never listened long enough to get an id, but it must be on 770 as well.

Jay
"Joe" wrote in message
...
For the past 2 months WABC in NYC at night has some kind of ANNOYING
warbling 200-400 hz "warble" under it.
Its visable on both sides of the center frequencey and cant be knocked out
with offset tuning with a narrow filter

Equipment R-390, Drake R-7
Antenna homebrew 6 foot shielded loop, balun

-Joe (NOSPAM)