Re: Here's the Scoop...
WTDA is a Class A station.
On the same channels Class A stations must be (transmitter site to transmitter site) 71 miles from another class A, 89 miles from a B-1 and 111 miles from a Class B. Translators, LP-100's are disregarded
The first adjacent channels (e.g., 104.1/103.7 for WTDA): 45 miles/A, 60 miles to a B-1 and 70 miles to a Class B
On the second and third adjacent channels (e.g. 103.3, 1`03.5, 104.3, 104.5) it's 19 miles to an A, 30 to a B-1, and 43 to a B. To a Class C such as WPAY it's 103 miles, if they are downgraded to a C-0, it's 94 miles
You can do a "preliminary study" for any channel you want in the Columbus area by going to WWW.FCC.Gov then "search" then FM Query. Find the coordinates of the transmitter site of the station you want to look at, write them down, then (at the top of page) use the window to go to FM Preliminary Study. Drop in these coordinates and choose another frequency. You'll q1uickly find out how crowded central Ohio is for FM channels.
They use kilometers for distances in the preliminary studies, here are the equivalents:
19 mi= 31 km
30 = 48
43 = 69
45 = 72
60 = 96
70 = 113
71 = 115
89 = 143
111= 143
WTDA is a Class A station.
On the same channels Class A stations must be (transmitter site to transmitter site) 71 miles from another class A, 89 miles from a B-1 and 111 miles from a Class B. Translators, LP-100's are disregarded
The first adjacent channels (e.g., 104.1/103.7 for WTDA): 45 miles/A, 60 miles to a B-1 and 70 miles to a Class B
On the second and third adjacent channels (e.g. 103.3, 1`03.5, 104.3, 104.5) it's 19 miles to an A, 30 to a B-1, and 43 to a B. To a Class C such as WPAY it's 103 miles, if they are downgraded to a C-0, it's 94 miles
You can do a "preliminary study" for any channel you want in the Columbus area by going to WWW.FCC.Gov then "search" then FM Query. Find the coordinates of the transmitter site of the station you want to look at, write them down, then (at the top of page) use the window to go to FM Preliminary Study. Drop in these coordinates and choose another frequency. You'll q1uickly find out how crowded central Ohio is for FM channels.
They use kilometers for distances in the preliminary studies, here are the equivalents:
19 mi= 31 km
30 = 48
43 = 69
45 = 72
60 = 96
70 = 113
71 = 115
89 = 143
111= 143