Antique radios, Old Time Radios
VX3114
| Filament |
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| Description |
(b> Pre-TR Cell for S-Band radar.
Glass tube filled with Brazillian Rock Crystal, 80% neon and 20% helium and 0.4% argon at a pressure of 40mm Hg.
(The pupose of a Pre-TR tube is to reduce the damage to TR tubes in high-power equipment.)
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| Information source |
-- Original-techn. papers.
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