Radio Channels

I know what channels are in use. But i am not shure were the channel Change is made

i go to the City now and then and bring my ht1550 with a Ear Bud i know channel 29 on the New haven. but is there a channel Change and if so were when they get down on the Harlem

yes New Haven trains(160.545) go to Harlem channel 161.280 at cp212 (just East Mount Vernon).
Hudson line(160.950) trains go to Harlem Channel at highbridge.

Thank you verry much makes it alot easyer for me now when i take a trip to the City.I am going down friday night (yes Party time) and i like to have my Radio with me to hear whats going on.

clears up a lot