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(2) National Union 6SN7-GT Black Glass Tubes; 1940's - Lot# 157
(2) National Union 6SN7-GT Black Glass Tubes; 1940's - Lot# 157
(2) National Union 6SN7-GT Black Glass Tubes; 1940's - Lot# 157
(2) National Union 6SN7-GT Black Glass Tubes; 1940's - Lot# 157
(2) National Union 6SN7-GT Black Glass Tubes; 1940's - Lot# 157

(2) National Union 6SN7-GT Black Glass Tubes; 1940's - Lot# 157

$ 15.83

Availability: 41 in stock
  • Country/Region of Manufacture: United States
  • Type: Vacuum Tube
  • Condition: Tested working condition.
  • Brand: National Union
  • Modified Item: No
  • Model: 6SN7-GT

    Description

    (2) National Union 6SN7-GT Black Glass Tubes; 1940's - Lot# 157
    Two (2) tested tubes (see Gm on each tube in pictures) from an estate. I had them professionally tested by a technician on a calibrated Hickok 539C using full voltage on the plate; checked for shorts, gas, and leaks. 1940's production with black glass bulb to reduce RF interference. These tubes are considered among the best by many audiophiles. (Reject
    @ 1640)
    Bad tubes from the estate were tossed out - listed tubes are guaranteed to be good (actual readings can vary by tester of course).  Tubes you see will be the ones you receive.
    Many more tube listings to come.
    Flat rate shipping CONUS.