You are buying a:

Strong GE Brown Base 5881 Tube

Logo as pictured

made in USA

Tube Codes: 63-13 188-5

Tested strong on a calibrated tester at: 90%

MINIMUM reading is 70% , NEW reading is 100%+ & MAX reading is 130%


All tubes are tested for filament, leakage, Dynamic Mutual Conductance and emission value - Tube passed ALL tests

Also tested and worked good in our equipment with no microphonics or shorts

 

Sold as is as Pictured as Described

 

 

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IB 1A10