Guided surface waveguide probe with insulating material in support platform near coil(s)

A guided surface waveguide probe, comprising:

• a guided surface waveguide probe including a charge terminal elevated over a terrestrial medium by way of a support structure, the guided surface waveguide probe being configured to generate a guided surface wave on the terrestrial medium;
• a primary coil and at least one phasing coil associated with the guided surface waveguide probe, the primary coil designed to be coupled to an excitation source when the probe is in operation, the primary coil being inductively coupled to the at least one phasing coil to excite the charge terminal to produce the guided surface wave when the guided surface waveguide probe is in operation;
• and
• a substantially planar support platform situated under the support structure comprising a roof of a substructure of the guided surface waveguide probe, the support platform having an aperture of sufficient size to enable the secondary coil to be moved vertically through the aperture, wherein a sides of the aperture are a predefined distance from the primary coil and the phasing coil to avoid degradation in a material of the substantially planar support platform.