Most of my tubes were U.S. made. Black plate tubes two are of 3-Mica support.
eBay
This tube is a grey plate tube with a top harp shaped getter. This tube tested on the first line at around 900 µ mhos and on the second line it tested at around 900 µ mhos. The Tube has excellent balance with a lesson 2% difference between lines.
eBay
For sale is a RARE Matched Pair GE JG-6201/12at7/ECC81 Black Plates Triple Mica tubes D-getter. Made in USA. All tubes are also tested for noise and microphonics. Tests very strong at NEW level and tightly matched.
eBay
New tubes at about 90 to 100 (a wide swing for AT tubes). Most of my tubes were U.S. made. One black plate, two 0-getters, one D-getter and one square getter.
eBay
Most of my tubes were U.S. made.
eBay
Tested strong 44/46gm (32 is minimum) on a professionally calibrated TV7U tube tester
eBay
One Matched pair of 12AT7 tubes, by GE (Canada). Most of my tubes were U.S. made.
eBay
Up for sale are 4 GE General Electric 12AT7 Tubes.
eBay