Full mutual conductance test, strong pristine nos pair: 110/110 ~ 109/110 % gm (65) + leak/short/gas/life/sound checks. 12at7 ecc81 ecc801s e81cc 12at7wa B739 B309 6211 cv4024 cv455 a2900 6060 6201 5965 12ay7 12av7.
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