"are PVC and soldered with RF at 27 MHz."
I hope it's not done inside a Faraday cage and there are CB antennas all up and down the block.
I'd test any plastic in a microwave oven accompanied by a 6oz GLASS of water for 30-40 seconds. Don't worry about that much water absorbing too much RF, that maggie spitting a kilowatt into a resonant cavity is plenty of juice... make mine fresh squeezed OJ (not Simpson).