A weld wheel assembly for disposition on a membrane welding machine, and for positioning a weld wheel adjacent a nozzle hot air outlet for pressing an overlying roof membrane heated by the nozzle against an underlying roof membrane heated by the nozzle, for welding the membranes together. Pressure oscillations generated in the fluid due to the oscillating valve motion are detected, and are used for regulation of the oscillating valve motion caused by the first actuating signal portion. A method of boosting signal strength of a conventional subscriber module radio antenna and a wireless communication system are also disclosed.