[tailstrike4]

Hi Robert,
I was at Bennet field yesterday, in the process of setting up my plane I checked the radio controls before I put the canopy on.
I noticed that the fiber optic cut off wouldn't turn off.
So I re-cut the end of the optic cable, no joy.
Then I put some black electrical tape around the coupling where the optic cable connects, no joy.
In the process of shading the sending unit with my hand I discovered that if I put some tape over the little green LED the unit worked OK .
Is it possible the green LED is leaking light?
Or is something else going on?

Thank you for your reply.
Larry Shreffler