New Old Stock! - New In Box!

2 (1Pair) 1950's NOS - General Electric -  JG-12AU7 / ECC82 Tubes

The JG-12AU7 is a Heavier Duty Military version 
of the traditional 12AU7

SUPER STRONG
Matched and Balanced 
 Matched and Balanced at over 110+% of NEW
 Tested on a NEW Maxi Matcher PreAmp II Tube Tester
Confirmed on Hickok 539B

Same Date Codes of 2-35
These tubes were made in August of 1952.
Long Grey Ribbed Plates with Top D Getters


Each tube exceeds 
General Electric's Factory Specifications.
General Electric's Original NEW Factory Specifications were 
for each tube to be at least 2200 micromhos when manufactured. 
Hickok's 539B Specifications state that any tube over 
1950 micromhos is good to use.
These tubes tested at a SUPER STRONG
2700 micromhos and Higher.
Both tubes are within 5% of each other tubes rating.

The DIGITAL Maxi Matcher PreAmp II Tester 
is used to find balanced tubes and them match them.
(They use their own proprietary GM Micromhos number value system and can not be used to compare to original factory specifications.)

The Hickok 539B is then used to confirm the test results and provide an 
actual number so that you can compare 
to the manufacturers New Old Stock Factory Requirements.
Please see final photos with the Hickok test results.


This sale is for One Pair of Tubes.

I have several matched Pairs for sale if you wish to purchase more.

Several photos are to show that I professionally 
test every Tube for Sale.
All Tubes are Tested for Noise, Shorts, Leakage, Gas, 
Plate Current, Life Test, and GM or Transconductance (micromhos).

9-12-25 update
The remaining Original White Military GE Boxes are in poor condition.
(Not the ones shown in the original ad.) 
I will ship the tubes in new white aftermarket boxes unless you ask for the original Boxes. 


NEW OLD STOCK

I am selling my father's vintage audio collection including his huge inventory of New In Box New Old Stock Tubes. All tubes have been tested and matched on two Hickok Professional Tube Testers. A Hickok 539B and then confirmed on a recently Updated and Calibrated Hickok 752A.


PreAmplifier and Power Tubes are tested on a NEW DIGITAL Maxi Matcher PreAmp II Tester,  and a NEW DIGITAL Maxi Matcher Power Tube II Tester.


Many of my tubes are marked in silver ink with my reference numbers. No returns will be accepted if the ink has been removed. The ink can easily be removed with alcohol. Please do not remove my reference numbers until you are 100% satisfied with your purchase.


I ship within 1 business day!


Buy with confidence. Please see my 100% feedback since 2008.


This sale is for One Pair of Tubes.


All photos are incorporated into the description. If you have any questions or would like a further description please ask prior to purchasing and I will be happy to try and answer your questions. I make every effort to answer email ASAP and always within 24 hours.

 

GENERAL TERMS:  PLEASE READ BEFORE MAKING YOUR PURCHASE.

Some of the boxes or items may have shelf wear. Please look at photos closely.

All electronics are now inconspicuously marked to reduce fraudulent claims.


I only ship to eBay confirmed addresses.

If you have any questions or would like a further description please ask prior to purchasing.

Please note that some items sold over $200 may require a signature upon delivery.


I make every effort to ship within 24 hours of payment, depending on post office hours.


Thank you for looking.