SHINING LIGHT is Offering The Following Tube:
One Excellent RCA 6X4 Tube 
Lot#: Z161
  • NOS NIB
  • CORONADO Lettering.  RCA Mfg.  Commercial 6X4 Tube Box
  • Classic Black Plates
  • Rugged Hanging "D" Getter
  • Tube Tests Very Strong & Balanced
Value-Added Tube
  • Pins Straightened & Cleaned with Proprietary Process.
  • Tube Surface Cleaned
  • "Plug & Play"
Testing 
AMPLITREX AT-1000
Tube Tested on a AMPLITREX AT-1000 Tester.  
Tube Tested as Follows.
Tube Readings: 
  • FWD Diode Conductance: 978uA & 979uA
  • No REV Conductance
  • No Shorts.
  • No H-K Leakage
Murphy's Law:
"All Tube Testers are Wrong but Some are Useful"
The Results from Your Tester will probably Differ from my Results.

Condition
Please Review Pictures Before You Purchase.  I provide lots of close-up pictures. :-)
Flashing: Decent Flashing that is Plentiful.
Lettering: Tube has decent lettering. > See Picture
Box: Commercial Box in good shape.
Date Codes: Cannot Read
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.