Mullard 12AX7 Tubes, Lot Of 5, Used, See Details In Listing, Hickok Tested

Each of these Mullard 12AX7 tubes has been checked on a Hickok 533A, and the results of the mutual capacitance (Gm) check of each triode is listed by each tube below.

1. 10M Series, yellow ink, halo getter, Triode 1: 1175, Triode 2: 1200
2. 10M Series, yellow ink, halo getter, Triode 1: 1000, Triode 2: 1100
3. Mullard, most of the ink is gone, dual post halo getter, Triode 1: 1050, Triode 2: 1000
4. Mullard, shield logo, good ink, dual post halo getter, Triode 1: 850, Triode 2: 850
   
5. Mullard, most ink gones, dual post square getter, Triode 1: 950, Triode 2: 900

All five tubes have ribbed, gray plates.

Tube data shows an original, new 12AX7 had an average Gm of 1250.  Divide each Gm value shown above by 1250 to get the "good percentage".

These will ship safely and quickly from Mississipi.