A method, system and electronic device for providing a partially encrypted data packet in a spread spectrum signal. The VCO comprises: 1) a storage capacitor charged linearly by a constant charge current and discharged linearly by a constant discharge current; 2) a comparator for comparing the storage capacitor voltage to an upper threshold voltage and a lower threshold voltage. In addition, the present invention can additionally include a rotary guide for exiting the shear-deformed material. A cooling andor curing trough through which water is flowed cools andor cures the plastic insulation. This method will allow seismic surveys to be acquired faster and cheaper.