[BC] Changing channels

[PeterH5322]

>Better to stick with a height a few degress smaller.

Interesting that KMJ went with 178 degrees (on 580, no less ... about 
3,300 feet of steel in the air, across four identical towers), while 
decades earlier (about three) KTNQ went with 180 on the money.

That diplex of 1020 and 1150 was heavily modeled, and apparently 180 gave 
no significent problems. Of course, 1150 certainly benefits from having 
five 203 degree towers and 50 kW.