I recently obtained a portable air band radio for use as a backup radio in flight. As this is a backup, it isn't much use without being tested. I'm trying to determine the proper way to test the radio. The FCC regulations clearly indicate that testing and maintenance is allowed so long as it does not interfere with actual usage of the frequency bands, but here is where it gets tricky, the regulations state that the licensee is allowed to test the radio, but most aircraft in the US no longer require a direct licensee as they don't require an explicit FCC license.
My take on this is that if you had an explicit aircraft station license, you could test the radio equipment even when it is not installed in the aircraft, however it is unclear how this maps to a pilot who has an air band radio they could use in an aircraft, but does not have an explicit aircraft license.
I realize this might be a bit too close to legal advice, but was wondering if anyone had any experience with this and what they found to be the proper procedure for testing the radio. I would just go and test it on my next flight, but there was also some documentation that requested not doing such tests from the ramp, so it's a bit unclear.