Pictures of two hombrew sockets for the GS-23B are presented below. From these pictures, and the drawings on the tube specifications page, it should be possible to reproduce these. Note that the center pin (filament only) fits the center contact of the SO-239 UHF connector very well! These sockets should be used for HF amplifiers only; the grid and screen bypassing requirements are much more stringent for VHF and up!
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#1.
#2.