You have the correct screw. It requires a short 1/8 inch flat blade
screw driver. However it is the cam lock screw. It does not push the
radio out. Clockwise to lock and counter clockwise two or three turns
to unlock. Generally you can feel the lock disengage. When
unlocked you must grab two of the larger knobs then shake while
pulling to remove the RT-308. The very small hole is for the VOR
centering adjustment.
Some of the other ARC radios require a 12 inch long flat blade screw
driver.

On Sat, 20 Mar 2004 22:20:23 -0800, "MRQB" wrote:

I found the screw it was right in the center lower part of the radio below
ware it said RT 308 it was not deep inside it was really close to the
surface unless it was the wrong screw I turned it it did nothing it would
just spin either direction there was a really smaller hole next to it. Is it
broken? or was i on the wrong screw?

"Kyle Boatright" wrote in message
...
In general there will be a hole in the face of the radio where you insert
an
allen wrench. Turn the screw clockwise to release the radio.


"MRQB" wrote in message
...
Hello, i would like to know how to remove the Cessna ARC NAV/COM 300
radio
out of my 150? Ware are the screws bolts ect located? So I can take it
in
to
be serviced or replaced it with a slide in replacement. I here it is
simple
to remove it, is it?