Matched Quad RCA 2E26 Vacuum Tubes NOS-Testing Lot Of Four 6FM7 Compactron T39 rectangular mica spacers (with rounded

rectangular mica spacers (with rounded edges on top)

these tubes are quite pretty with old-fashioned shoulder bottles and should work fine in most applications

Transconductance measured 67 in Section One and 65 in Section Two for Tube One and 67/69 in Tube Two where minimum (65%) is 50/50 and 100% is 77/77

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 CD is in excellent shape

Matched Quad RCA 2E26 Vacuum Tubes NOS-Testing Lot Of Four 6FM7 Compactron T39 rectangular mica spacers (with roundedThis 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