Pair Amperex 7308 USN-CEP PQmade in USA, strong, matchedPair Amperex 7308 USN-CEP PQ made in USA, strong, matched gold pinUp for your consideration are matched pair of Made in USA Amperex 7308/E188CC USN-CEP vacuum tubes with gold pins. Painted letters are in very good shape and both tubes have identical constructi...190.00

Pair Amperex 7308 USN-CEP PQ made in USA, strong, matched gold pin [Expired]


no longer for sale

Up for your consideration are matched pair of Made in USA Amperex 7308/E188CC USN-CEP vacuum tubes with gold pins. Painted letters are in very good shape and both tubes have identical construction. These are made for US Navy, and they are exactly the same tubes as Amperex White Label PQ 7308 tubes. (only with tighter and more stringent military spec) They have "VR" code which indicates 7308 type tubes. Both tubes are made in the same year December and October of 1963 indicated by date code (VR5*3L and VR5*3J), and both tubes are packaged in 22nd week of 1964. My most favorite 7308 tubes, Quiet, Dynamic, Tightly matched and Strong! Many consider Amperex 7308 tubes the best of the best in 6DJ8 family tubes. Rated to have 10,000 hours useful life! Should last for years! I have many more of these tubes, so please ask if you need more than one pair. Test very strong! Tightly matched (all 4 sections are within 9%)! Low noise! Guaranteed! Paypal add 3.5%. *************************************************************************************************** Shorts, Gas and Noise: passed Noise Test: passed with very good noise and micorphonic characteristics Gm Test: Tube #1 Triode Section 1: 12600 Tube #1 Triode Section 2: 13300 Tube #2 Triode Section 1: 12200 Tube #2 Triode Section 2: 13000 Where minimum good is 7000 and spec for new is 12500 *************************************************************************************************** I guarantee excellent performance, so bid with confidence. If you are not satisfied with my tubes for any reason, I will issue full refund for your purchase price. (Buyer pays for return shipping) Priority Mail shipping within US with delivery confirmation is $5.90. Priority Mail International Small Flat Rate Box shipping is $13.45. First class mail will cost less. I can ship by First class mail if requested. All tubes are tested by Hickok 539C vacuum tube tester. This tester was precision calibrated by Roger Kennedy to improve measurement accuracy. 83 and 5Y3 tubes were replaced by Solid State rectifiers to minimize calibration drift in the tester. I also perform listening tests on these tubes using Music Reference RM-4 pre-preamp (moving coil head amp), which has 30 db gain. This unit uses two 6DJ8 tubes (one for each channel). Each channel uses both sections of the 6DJ8 tube.
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