Italian Sylvania 12SN7 12SN7GTA Vacuum Tube NOS NIB Vinyl LP MGM Records new in box GE 38HE7

new in box GE 38HE7 tube tested to spec on our Paul Hart-calibrated Hickok TV7/U

new in box Sylvania 7056 tubes tested to spec on our Paul Hart-calibrated TV7/U

55 and 55 where minimum (65%) is 40

This CD is in excellent shape

new in box RCA 6BN4A tubes tested to spec on our Paul Hart-calibrated TV7/U

Italian Sylvania 12SN7 12SN7GTA Vacuum Tube NOS NIB Vinyl LP MGM Records new in box GE 38HE7This new old stock, new in box Italian Sylvania 12SN7GTA dual triode was tested on our Hickok 600A for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured a perfectly balanced 2700 2700 micromhos. (New 6SN7s typically test within a standard deviation of 2600 micromhos; minimum (65%) is 1690). It has copper support rods; staggered gray plates; copious flashing and a large, side D getter. I have played it in one of