* 
One matched pair, circa 1956+/-, U.S.A. made by RCA,
type 6SN7GTB vacuum tubes
as pictured.

Condition:
No original packaging, selling as used tubes

Silk-Screening:
Please refer to photos

Acid Etched Designations:
6SN7 / GTB
6SN7 / GTB

Date Codes:
JBR
WXT

Tubes feature carbonized-black ladder plates, short glasses, small black bases, copper grids and side-mounted 'Rectangular' getters construction.

Tubes appear identical in construction.

*

Hickok TV-7D/U* tested

@  94/96     100/102

minimum acceptable value for a good tube:
50/50

(Plate#1 / Plate#2)

*Hickok TV-7D/U is a mutual conductance(Gm) type tube tester. It does check for mutual conductance which is a more accurate measure of tube's age.

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