How many amps would a 15watt radio draw in the transmit mode with 12 volt being supplied to the radio?

Power equals voltage times current in amps. The value of amps used is needed to do the math.

It depends on the source.

Have to know the wattage or resistance of the lamp to answer this question.

That varies. Different devices are designed differently. Somewhere on outside (usually on the back) of every electrical device there should be a kind of permanent sticker stating the voltage and...

Shorts or non-functioning circuits on one of the bands- but leaving the other bands operable- it is like a system of say- juke boxes or speakers controlled by a rotary switch- one component could be...