Overview
UPDATE: the radio was removed but this guide can still tell you how to make any map the void map without the radio. i do not know why the radio was removed. it is sad, but guide still helps with turning maps into the void map.
Where to find it
I found mine on the second cliff of the tower. sorry there will be no images in this guide as when i have tried putting them in they just come out as links
Experiments
As far as i have tested, every single item and projectile can interact with this radio, however, if you try to click it or save it or anything like that then its an non-existent object and you can not grab it. i think that all powers interact with this in the way they are meant to, lightning is a good way to make it move. it can be trapped by misc items such as metal beams and concrete walls. the guns that make people turn into concrete also do not effect this radio.
How to activate the secret map
The tower map changes in to the “void” map if you can get the radio to go into a black hole. the effects of the black holes immense SUCC will still effect the radio, so you only need to make a black hole close to it. once it is devoured by the black hole the map will turn into darkness, no light effects. i tested every single light and nothing changed it. items spawned in the void will still be of the same brightness as if it was not in a void. i tested if there was a roof and if there was a bottom, no they just go off screen and the tower disappears. i tested everything and its just a void map.
NO LONGER WORKING (SORT OF)
hello, it got removed in a recent patch, i dont know why. items like this have been getting added and then removed. such as the vase on one of the maps, removed months ago. anyway, the radio is no longer there but according to two very helpful comment makers by the name of Nick7 and /etc/passwd. according to them you can turn any map into void map if the black hole is placed on the lights or any source blocks. credit to them for this information
Bye
Bye