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Tube Database (7,341 tube types · 1,270 archive entries)

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Test instrument record

Mercury

990

Mercury

Archive ID
4wmz2n3q
Type
Emissions Type Tester
Type B
Tube
Model
990
Brands
Mercury
Archive ID
4wmz2n3q
Type
Emissions Type Tester
Type B
Tube

Mercury tester details