SHINING LIGHT is Offering the Following Tube:
One Excellent ARCTURUS 6BK7 Tube
Lot #: N297
  • NOS NIB
  • TUNG-SOL Mfg. ARCTURUS Lettering & Tube Box
  • Tests Very Strong & Balanced
  • Black Plates
  • "Horseshoe" Getter
  • Cu Grid Rods
  • Date Code: 9-61
Value Added Tube
  • Pins Cleaned & Straightened with Proprietary Process
  • Tube Surfaces Cleaned
  • Plug & Play
TESTING
TV-7A/U
Tube Tested on a NOS Reference TV-7A/U Tester
Tube Tests as Follows:
  • 78/75: 126%/121%
The Calculated Average for NOS 6BK7 Tubes is: 62/62.
The Hickok Minimum for a 6BK7 Tube is: 43/43.
The Minimum Value is Defined when a Tube has 65% of it's Life Left.

Murphy's Law:
"All Tube Testers are Wrong but Some are Useful"
The results of your tube tester may vary from these measurements.

Returns:
  • We Offer 30 Day Returns with a Free Shipping Label!
  • Returns Accepted if the Items are Returned in the Exact Same Condition.
  • The Pull Tabs on the Tube Boxes Must be in the Same Condition.
  • The Cotton must be Installed on Each End of the Tube in Each Box.
  • The Pull Tabs will be Taped so Tubes do not Fall-Out of Boxes During Shipping.
  • Carefully Cut the Tape on the Pull Tabs to Open Boxes.
  • The Lettering on the Tubes Must Also be in the Same Condition upon Return.
  • Hold Tubes in Areas where there is No Silkscreen.
  • Tubes Must Test with the Same Results Upon Return.
Facts about Murph...
  • Dairy Farmed in Green Bay, WI until I was about 27 years old.
  • Started in Electrical Engineering before moving to Biological Engineering.
  • If you ever ate a candy bar, I might have had something to do with the quality...
  • Over the last 10 years, I have moved my spare time to repairing tube and discrete amps & receivers.
  • I like Fisher Receivers and Scott Amps.
  • I have too many tubes.
  • Statistics-driven when evaluating vacuum tubes > Certified Six Sigma Master Black Belt.
  • Testing Equipment: Two Nelson Hickok TV-7s, Two Hickok 539Bs, One Recently Acquired AMPLITREX AT-1000.
  • I have too many testers.
  • Murph really tries to to list and sell really good vacuum tubes.