C_Western

Western Electric abandoned development early on for this tube. Called the "Lyre" tube because of the glass arbor construction. Instead of an arbor in front of and/or behind of plate structure, this tube used a glass arbor on either side of the plate structure, resembling a Greek lyre. This tube was intended to be used as a low power output tube for use in connection with loud speaking telephones.

The grid bars are vertical, in the same plane as the filament making this tube "co-planar". The filament was twisted coated ribbon.

Replaced by the Type H tube.

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