Triode #1 - Plate Current = 9.22mA \ Rp = 11101 \ Gm = 5884 \ Mu = 65.3 \ Corners = PASS. Triode #2 - Plate Current = 9.65mA \ Rp = 10441 \ Gm = 5855 \ Mu = 61.1 \ Corners = PASS. Triode #1 - Plate Current = 10.24mA \ Rp = 10420 \ Gm = 6141 \ Mu = 64.0 \ Corners = PASS.
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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.
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MIN = 32 / 32.
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Tested Good.
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eBay
The pictures shows an GE 12ax7 Long Grey plate Horseshoe getter 95/90 each side 1950s. Tube Tester Scale reads. So, for example. -- George Kostyrko. I don’t plan to do any price gouging. I back my tubes up.
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
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