*FantasticTubes 🎷🎶

*

Bid is for one matched pair, circa 1960s, USA made by RCA,
type 6X4 vacuum tubes
as pictured.
As pictured = What You See Is What You Get

Condition:
Tested, Satisfaction Guaranteed

Silk-Screening:
Please refer to photos

Tubes feature black-plates and top mounted 'Rectangular' (see the photo please) getters construction.

*

Hickok 539B* tested

Test Results
Tube#1        96/93                      
Tube#2        95/96                       

(Plate#1 / Plate#2)

minimum recommended value for a good tube
54/54 

*Hickok 539B is a mutual conductance type tube tester. It does check for mutual conductance which is a more accurate measure of tube's age.

Satisfaction Guaranteed!
*FantasticTubes !!!
🎷🎶