SHINING LIGHT Offers Quality Products. Our #1 Focus is Taking are of our Customers.  
Three GE 12AT7 ECC81 Tubes
  • Fully Vetted Tubes
  • MULLARD BLACKBURN, SYLVANIA, & RCA Tube Lettering & Tube Boxes
  • There is a very small piece of mica flake in the RCA Tube.  No Biggie > Mica is non-conductive.
  • Mfg/Date Codes: VF3/B0D1, LD, BN
Value Added Tubes
  • Pins Straightened & Cleaned with Proprietary Process. 
  • Tube Surfaces Cleaned. 
  • "Plug & Play"
Testing
HICKOK TV-7B/U
Test Procedure: 
  • Let TV-7 Warm-Up for at Least 1/2 Hour.
  • Some Tubes Tend to Take Time to Reach Steady State and Reach Their Full Reading on the TV-7.
  • Allow Time for Tubes to Reach Steady State.
Tubes Tests as Follows:
  • Tube #1: 63/69: Percentage of Calculated NOS: 82/90.
  • Tube #2: 64/64: Percentage of Calculated NOS: 83/83.
  • Tube #3: 70/65: Percentage of Calculated NOS: 91/84.
  • No Shorts
The Calculated Average for a NOS 12AT7 Tube is: 77/77.
The Hickok Specified Minimum for a 12AT7 Tube is: 50/50.
The Hickok Minimum 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.

Shipping:
  • I Have Combined Shipping that Adjusts the Shipping Weight for Multiple Items in a Shopping Cart. 
Returns:
  • I Do not Have Many Returns.  
  • My Overall Return Rate is 1.11%.
  • At Times, when I Get a Return Request, I Might Just Refund w/o Returning Depending on the Situation.  Makes No Sense to get a Shorted Tube back in the Mail!
  • If You Need to Return, it is Cool.  
  • Sometimes, Tubes will not Make the Journey to Your Address.  
  • The Frequency is very small, approximately 0.25%.  
  • Usually, the shipping box is destroyed or the Tube Shorts during Shipment.
99% of Audio Tube Buyers are Easy to Work with.  We are family.  That 1% is where the Problems Usually Occur.

We Offer 30 Day Returns with a Free Shipping Label.  Returns Accepted if the Items are Returned in the Exact Same Condition.

Test Driving Tubes and Returns.
  • The Same Exact Tubes Must be Returned.  No Switching Tubes.
  • Tubes must Test with the Same Numbers Upon Return. There is normal variance in Test Results so I take this into Consideration.  I Validate Test Instrumentation in my Professional Life.
  • The Flashing Must be in the Same Condition Upon Return.
  • The Plate Surfaces Must be in the Same Condition upon Return.
  • The Lettering on the Tubes Must Also be in the Same Condition upon Return of Package.
Tube Boxes and Pull Tabs
  • The Pull Tabs on the Tube Boxes Must be in the Same Condition upon Return.
  • Try Opening the Rear Pull Tab First.  If the Tube is Not Accessible from the Rear Tab, Go to the Front Tab. 
  • The Supplied Foam or Cotton must be Installed on Each End of the Tube in Each Box.
  • If the Pull Tabs are Torn Upon Return, the Refunded Price will be Adjusted Accordingly.
Tape Might be Used to Hold End Pull Tabs in Place when You Receive Your Package.
  • The Pull Tabs might be Taped so Tubes do not Fall-Out of Boxes During Shipping.
  • Carefully Cut the Tape on the Pull Tabs to Open Box Pull Tabs.
Inexpensive Retractable Box Cutting Knife Works Well for Opening Tube Boxes. 
  • Use the Blunt Side of a Thin Box Cutting Knife to Aid in Opening the Pull Tabs.
  • Hold Tubes in Areas where there is No Silkscreen.  This is an Art.
Facts about Murph...
  • I Grew Up in the 70s and Love Rock Music.
  • The Best Concerts I saw were Aerosmith, Judas Priest and Iron Maiden.
  • I was at the Forefront of Installing Sound Systems in Cars. Alpine Head Units and Rockford Fosgate Amps were my preferred selections.
  • 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, at UW-Madison and it was a good move.
  • I spent most of my career in the Confectionery Industry in R&D, Continuous Improvement & Quality Engineering.
  • If you ever ate a candy bar, I might have had something to do with the quality...
  • Over the last 15 years, I have moved my spare time to repairing tube and discrete amps & receivers.
  • I like Fisher Receivers and Scott Amps.
  • Statistics-driven when evaluating vacuum tubes > Certified Six Sigma Master Black Belt.
  • Testing Equipment: Two Nelson Hickok TV-7s, Two Hickok 539Bs, and an AMPLITREX AT-1000.
  • I Really Try to List & Sell Really Good Vacuum Tubes.