Ken-Rad (GE) 12AU7 ECC82 Pewter Plate Tubes, Matched Quad, NOS, Tested, Matched Codes

Hello - I have a matched quad of pewter plate Ken-Rad GE 12AU7 ECC82 tubes for sale. These tubes are NOS. GE bought the Ken-Rad factory around 1950-1951 and continued to build Ken-Rad tubes with GE markings. The etched 12AU7 is a Ken-Rad marking. These tubes have long (17 mm) pewter plates, horse shoe getters and matching 1951 date codes. TV-7/B test results: 105/105, 105/105, 105/105 and 105/105. Minimum is 56. They have also been checked for noise and microphonics in the phono stage of my DIY pre-amp and are dead quiet. All tubes are tested on my calibrated TV-7/B or on my calibrated Hickok 539C. All of these tubes have been tested for transconductance, shorts, gas, leakage and life. All tubes meet or exceed manufacturer published specifications of transconductance (Gm) for the specified tube type. All tests are tested twice - prior to the listing and prior to shipping. Please check out my other ad's on Audiogon. If you don't see the tubes you are looking for, please contact me. Be sure and click on the “other items' link for more tubes. I will ship international. Free shipping in the USA. Canadian shipping is $15.00 and international shipping by first class is $18.00. Your tubes will be carefully packed. No charge for paypal. Please check my feedback and buy with confidence.