In article . com,
says...

I'll keep this simple.

I have a mobile radio mounted in my car. It's an Icom 207H 2m Mobile. I
need to somehow (as easily, cheaply, and quickly reversible as
possible) restrict the transmit distance to something quite short (say,
between 50 and 200 feet, at the maximum). What's the best and easiest
way to do this, while still keeping something that can be easily
reversed?

Attach a good quality dummy load to the antenna connector, and
make sure your TX power is set at low. That should keep the emissions
down.

Will simply running the radio on low power (5W) with no antenna do the
trick, keeping in mind that the radio is inside a metal car? Or should
I somehow shield the end of the coax and/or the body of the radio?

If you value your radio's transmitter stages, NEVER run it without
either an antenna or dummy load. Period.

Was that not covered in your ham radio license study material?



--
Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute.
(Known to some as Bruce Lane, ARS KC7GR,
kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com
"If Salvador Dali had owned a computer, would it have been equipped
with surreal ports?"