NOS NIB RCA 5U4GB, Airline 5U4GB, Both Test VERY Strong, Guaranteed Lot 5519. T5

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NOS NIB RCA 5U4GB, Airline 5U4GB, Both Test Very Strong, Guaranteed. Lot 5519. Test results of the 2 sections of each tube:

The NOS RCA tube tests at 110 and 110. The maximum reading on my tester is 100, so this is an extremely high reading.
The Airline tube (used) tests at 80 and 84, also an unusually high reading. Most new tubes test lower than this.

Tested on a Precision Apparatus Model 10-12 where the minimum good reading is 54. 

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