Matched Quad RCA 2E26 Vacuum Tubes NOS-Testing Lot Of Four 6FM7 Compactron T39 I have listened to this

I have listened to this entire album and It has light to lightly-moderate surface noise audible in quiet passages and barely-audible in voice-level passages

This matched pair of Sylvania 6DE4 rectifier tubes was tested on our Paul Hart-calibrated TV7/U for shorts

One is milspec

Tube One measured 60/56 while Tube Two measured 61/58 where minimum (65%) is 50/50 and 100% is 77/77

Matched Quad RCA 2E26 Vacuum Tubes NOS-Testing Lot Of Four 6FM7 Compactron T39 I have listened to thisThis new old stock TESTING matched quad of RCA 2E26 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 68, 69, 70 and 72 where minimum (65%) is 44 and 100% is 68. These tubes are well made with eight wire snubbers per tube for increased mechanical rigidity and the suppression of microphony. They also have black plates and Micanol bases. WE HAVE SCORES OF