Matched Quad RCA 2E26 Vacuum Tubes NOS-Testing Lot Of Four Marshall 5 out of ten for

5 out of ten for sonic quality

Transconductance was 1670 for Tube One and 1570 for Tube Two where new/nominal is within one standard deviation of 1900

new in box Raytheon 6BA11 tubes tested to spec on our Paul Hart-calibrated TV7/U

5 inches in circumference

new in box GE 2D21 tubes tested to spec on our TV7

Matched Quad RCA 2E26 Vacuum Tubes NOS-Testing Lot Of Four Marshall 5 out of ten forThis 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: 64, 64, 64 and 67 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