Description

2 x 6AS7ga GE Tubes Made in USA Black plates The offer is for 2 tubes and there are 3 offers available You pick or I will just send next in line Ask any questions before buying, not after Tested on enhanced Triplet E3444 Laboratory Tester prepared by Paul Hart of Roswell Ga. Pair # 1 = Sold 7300/7000 micromhos @ 105/104 mA 6700/7000 micromhos @ 117/112 mA Pair #2 7000/6700 micromhos @ 125/126 mA 6950/7050 micromhos @ 136/136 mA Pair #3 6700/7000 micromhos @ 113/108 mA 6850/6900 micromhos @ 113/130 mA Bogey (100%) = 7000/7000 micromhos @ 125/125 mA +/- 10% These are industry standard specifications and are not tester proprietary The measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us. The test conditions for this listing are __ 135 _Volts plate, __ 135 _Volts screen, ___ 250 ___Volts bias or Cathode resistance *(CBR) What were your tubes tested at? I do combine S&H