I've had a modded Yaesu VX-5r for awhile now and have wanted to try out that old Taco Bell trick.
I tried testing it out the other day. Using the stock ~7-inch antenna, I pulled up to the Burger King drive thru with my VX-5 set to the frequency that the clerk speaks on. I knew it was working when I heard "What'll you be ordering today" my radio. I spoke into my radio, and saw the screen tell my I was transmitting. But somehow my voice didn't come through to the drive thru speaker.
Is my VX-5 probably messed up or am I doing something wrong? Does this require a more powerful antenna? Or maybe a better crystal? (just kidding)
I know the PLA isn't the must knowledgeable crew to ask about this kind of thing, but most radio forums are a bunch of moral, law abiding citizens who'd ban me before even considering to help out.