This is an early 1950’s JG GE 12AT7 from military stock. Being made in the early 1950’s (1951-1953), these tubes are about as close as you can get to the origin of the most popular vacuum tube pinout on the planet. Keep in mind the 9-Pin miniature tube was developed in 1948. These specific tubes were early military orders and are of the highest quality available. The United States military relied on these for computers and targeting equipment. They *had* to work well. And they will work great in your gear. These all have the 1950’s era “D” style getter.
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For sale is a RARE GE-7025 Matched Pair 12ax7/ECC83 Double mica Gray Plate tubes, D-Getter Long Plates. Made in USA, 1960s. All tubes are also tested for noise and microphonics. Here you will find a wide selection of NOS and reissue tubes.
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Strong pair of GE 12AX7 long plate tubes. Horseshoe getters and identical 1958 date codes. Gm matched to about 6% difference on the Amplitrex AT1000. Number 12AX7. Small signal (i.e. 12AX7) tubes are generally checked for noise and microphonics; power tubes (i.e. 6L6) are usually not.
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Most of my tubes were U.S. made.
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One lot of three assorted 12AT7 tubes, by GE (Canada). Most of my tubes were U.S. made. Black plate, different getter shapes.
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From a Motorola tube caddy, new old stock, tested, new and balanced on my calibrated tv7
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Both tested strong on an Amplitrex AT1000 tube tester with the following results (as photographed): Tube 1- 100/83% ip 106/92% gm Tube 2- 91/125% ip 91/112% gm
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