SHINING LIGHT is Offering the Following Tubes:
Two Excellent SYLVANIA 6K6GT Tubes 
Lot#: K218
  • NOS NIB
  • Matched Construction
  • Both Tubes Test Strong from a Reference AMPLITREX AT1000 Tester
  • Black Plates
  • "O" Getters
  • Date Codes: jb over BCP, FK over MYS
  • Description & Pictures for Current Tube Set
Value Added Tubes
  • Tube Pins Cleaned & Straightened
  • Tube Surfaces Cleaned
  • "Plug & Play"

AMPLITREX AT-1000 Results
Fixed Bias.
GM Takes Precedence Over EM
Tubes Test as Follows:
  • GM [%]: 98 & 111
  • EM [%]: 10 & 104
  • Fixed Bias
  • No H-K leaks
  • No gas
Murphy's Law: 
"All Tube Testers are Wrong but Some are Useful"
The results of your tube tester may vary from these measurements.

Tube box will be taped on ends and have cotton inserted on each end of tube.

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 out my career in electro-mechanical, then Electrical Engineering.
  • Moved into Biological Engineering where I spent most of my career.
  • 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.