These were tested on a B&K 707 Mutual Conductance tube tester @ 98, 98 GM and on a B&K Dyna Jet 606 for emissions @ 97, 97.
Item Tag: EL34 6CA7
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Matched Pair 1960s Mullard xf2 OO Getter EL34 Tubes Test NOS TV7=51/51 @ 36/37ma
Near perfect match. Tested for Gm on TV7-D/U . Tested for Emissions on B&K Dyna Jet 606. TV7 Results = 51 & 52 where minimum/good is 30. Dyna Jet 606 Results = 105 & 106 emissions. Plate current near perfect match at 36 & 37 milliamps. New Mullard boxes. View my sellers list for more EL34s. I have hundreds of high end EL34, KT77, EL37, 6L6G/6L6GC/STR387, 6V6G/GT, 8417, 5372, 7591, and a smorgasbord of high end preamp tubes that are not listed on ebay…inquire if interested.
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(2) Vintage Amperex “DD” Getter Brown Base EL34 6CA7 Tubes Tested @ NOS
Production codes are xf4-L1O & xf4-X9I. Also tested for Micromhos on my Hickock 800A (see photos for all test results)
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MATCHED PAIR MULLARD 6CA7 EL34 TUBES xf2 B8F3 TV/7 and Amplitrex Tested 100%
Etched Code is xF2 B8F3 = 1968 Blackburn Factory. Mullard EL34 6CA7 Tubes. Amplitrex AT1000 Tested. The minimum for a EL34 is 30. Years ago, I put away a bunch of great Tubes. Matched Pair. There are tens of thousands of tubes there.
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NEW MATCHED QUAD Electro Harmonix EL34 EH tubes valves EL34EH
New in generic boxes. Fully tested and professionally matched. Quickest shipping from NessTone Tube Sales
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(4) NOS RFT Germany EL34 Tubes With Test Documentation G1 Bias, Gm, GL, IKP, VG2
Understanding Tube Test Results: G1 Bias, GM, GL, IG2, IKP, VG2. This is from a pulse test and indicates the tube’s maximum current capability. NOS Quad of (4) original RFT Germany EL34 tubes from bulk 100 count cases produced for amplifier builders.