Importance

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Abstract

A coaxial resonance cavity of either the fingered or unfingered variety having a metal heat conducting barbell shaped structure inside the movable tuning plunger to conduct heat from the inner surface of the movable plunger to the inner surface of the fixed stub or directly to the shield to provide for a heat conductive path to the shield to carry heat away from the inner plunger. The barbell is an integral structure machined from stock aluminum, but resembles three right circular cylinders butting end to circular end. The upper cylinder has a diameter appropriate to maintain tight contact with the stub. The lower cylinder has a smaller diameter, appropriate to maintain contact with the movable plunger. The central cylinder has a diameter which is sufficiently small to avoid contact with any portion of friction buttons located on the side of the plunger to serve as a spacer between the plunger and the stub, especially such portion of the button which may extend entirely through the plunger for support of the button.

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First Claim