ge 12at7 tube, tested at, 5200-4000, with 2500 being min good tube on a hickok 539c, no shorts leakage or gas.
eBay
• 12BA6 (3 tubes) - Remote-cutoff pentode. • 12AT7 (3 tubes) - High-gain dual triode. • 407A (2 tubes) - Premium pentode. • IU5 (1 tube) - Battery-type pentode. • 12AU7/12AU7A (8 tubes) - Popular dual triode preamp tube.
eBay
Matched pair testing very strong.
eBay
Excellent condition NOS
eBay
One General Electric and two United (made in Holland) 12AT7 tubes. Price is for one tube. We also used to repair wire and tape recorders and 16mm projectors.
eBay
Hi tested good. Min value 50/50.
eBay
One lot of three heavy duty 12AT7 tubes, by GE. Most of my tubes were U.S. made. For example.
eBay
eBay