Kim Sleep wrote:

Actually, the stupid part of the story is the fact that you actually allowed
him to do the installation himself, or allowing him to remove the power jack
himself. The SMART thing to do (other than not loan out expensive items), is
to supervise installation yourself, especially when it involves any sort of
modification.

well, i have looked at the radio.
apparently the installation was correct how ever,
the wiring in his home is incorrect and thus when the
antenna was connected which is part of his outdoor ground
there was a nice current surge through the neutual from the
power supply.
why his power supply is not isolated from the neutual is
belong me .
but in any case, the radio does not have a fuse on the
- side of the connection, only on the + side.
he is correcting the house wiring today and is willing to
pay for the damage and my time.

P.S.
i try not to loan out expensive equipment to strangers.