April 1, 2024
National 6414 labeled 6201 12AT7 Triple Mica NOS Vacuum Tube (Quantity 10)
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These are really interesting long plate 6411 but for some reason were labeled 6201(Low Noise 12AT7) by National. National was a relabeler and did not make tubes. I don't know who made these (GE, Sylvania or RCA). My guess is RCA or GE due to how the plates look. THese are authentic triple mica tubes. These are the tallest 6201 variants I have ever seen. The glass envelope is as tall as a 6Aq5 with width similar to any 6201/12AT7. This auction is for a total of 10 tubes. All Tes t about 1,600 micromos where 675 is the minimum for a good tube. SO all test NOS and are strong. None showed any leakage or shorts. All tests completed on a calibrated Hickok 752a.International buyers are welcome to bid but must have perfect eBay feedback and 25 completed transactions in the last 24 months. All shipping via the eBay global shipping program.
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