Tubes Vacuum

RCA 5U4G Vintage 1960s Rectifier Tube ST Style NOS in Box Tested / Guaranteed  This Tube and all others I sell, have been tested on a B&K Dyna-Quik Model 700 Dynamic Mutual Conductance Tube Tester and tests at or close to a NOS full Emission...

RCA 6CL6 New Old Stock Vacuum Tubes Sleeve of 5 These tubes were purchased in bulk and came in Styrofoam packaging so there are no branded boxes.   They will be shipped in small white tube boxes, packed very well. RCA 6CL6 Vacuum Tubes: The RCA...

This RCA 5557 New in Box Thyratron Mercury Vapor Triode, is a rare find. Newer versions of this tube do not have the quality of this original RCA. Description 5557 THYRATRON TUBE HIGH SENSITIVITY SPARK PROTECTION TUBE FOR HIGH FREQUENCY MACHINE...

RCA 5R4GY Rectifier Tube ST Style with "D" Getter 1950 Date Codes NOS Tested / Guaranteed  To Date I have (2) of these NOS in stock   This Tube and all others I sell, have been tested on a B&K Dyna-Quik Model 700 Dynamic Mutual Conductance...

RCA 5R4GY Vintage ST "Coke bottle" Rectifier tube with Black Plates and a D Getter Date Code 1955   I have only 6 of these tubes in stock.   This Tube and all others I sell, have been tested on a B&K Dyna-Quik Model 700 Dynamic Mutual...

RCA 5R4GYB Rectifier Tubes 1960s Date Codes NOS Tested / Guaranteed   This Tube and all others I sell, have been tested on a B&K Dyna-Quik Model 700 Dynamic Mutual Conductance Tube Tester and tests at or close to a NOS full Emission /Tube...

RCA 5U4G Vintage 1960s Rectifier Tube ST Style NOS in Box Tested / Guaranteed  This Tube and all others I sell, have been tested on a B&K Dyna-Quik Model 700 Dynamic Mutual Conductance Tube Tester and tests at or close to a NOS full Emission...

This Tube has been tested on a Dyna-Quick Model 700 Dynamic Mutual Conductance Tube Tester. This tube measures 100 % Grid Emission.  The tube in the photograph is the actual Tube in this listing...

This Tube has been tested on a Dyna-Quick Model 700 Dynamic Mutual Conductance Tube Tester. This tube measures 100 % Grid Emission.  The tube in the photograph is the actual Tube in this listing...

This Tube has been tested on a Dyna-Quick Model 700 Dynamic Mutual Conductance Tube Tester. This tube measures 95% Grid Emission.  The tube in the photograph is the actual Tube in this listing...

This Tube has been tested on a Dyna-Quick Model 700 Dynamic Mutual Conductance Tube Tester. This tube measures 95% Grid Emission.  The tube in the photograph is the actual Tube in this listing. The original box was not in good shape This tube comes...

This Tube has been tested on a Dyna-Quick Model 700 Dynamic Mutual Conductance Tube Tester. All NOS tubes I sell measure 100 % Grid Emission.  The tube in the photograph is the actual Tube in this listing...