Lavendar town.
The Kanto radio tower is in Lavender Town.
you go to the Kanto radio tower in lavender town
lavender town
In the radio tower in the Kanto region from a man in brown clothing.
it is at the top floor of the radio tower in the Kanto region
it is i the kanto region in soul silver after you defeat the elite 4
Lavender Town> Radio Tower> Someone
In Lavender Town, where the radio tower is, there is in old man inside and he will give you the Kanto Radio card (if it is your first visit)
You cannot go into any other floors except for the very first floor in the Kanto Radio Tower in Lavender Town.
it depends on what region your in in johto it will be in goldenrod city. If your in kanto it will be in mahogany town.
In Gold, Silver and Crystal, the Ghost Tower has been transformed into Kanto's Radio Tower and you will no longer be able to explore it.
in front of diglet cave wake it up with the flute on the radio after you go to radio tower in kanto