SHINING LIGHT is Offering the Following Tube:

One Excellent RCA 7N7 Tube

Lot # K16

• NOS NIB
• Excellent Flashing
• Date Code: KB
• Box is in Great Shape.

Value Added Tube

• Pins Cleaned & Straightened with Proprietary Process
• Tube Surfaces Cleaned
• "Plug & Play

Testing

HICKOK TV-7D/U

Tube Tested on a Hickok TV-7D/U

Tube Test as Follows: 

• 103/105: 134%/136% of Calculated Average NOS Tubes

The Calculated NOS Average for 7N7 Tubes is: 77/77.

The Minimum for a 7N7 Tube is :50/50

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 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.