Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods

Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support RodsThis matched pair of GE 6SN7GTA dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 53 53 for Tube One and 56 56 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have 4 48 188 5 and 4 43 188 20 date factory codes; copper support rods, horseshoe getters and excellent flashing. I have played them in my Cern Audio phono preamp and they

Plate current measured 23

You will always get the-best-testing tube(s)

These four GE 8BM11 tubes tested to spec on our Paul Hart-calibrated TV7/U

They sound great in my Alan Eaton single-ended 45 amplifier (with an adapter

This new old stock-testing matched pair of milspec RCA JAN-CRC-6F6 / VT-66 tubes was tested on our Maxi-Matcher 325 volts on the plates and a bias of -36 volts for shorts

They measured 66/59

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

This LP sounds very good with nary a pop and tick

Bases: N/A

This Philco 6N7G tube was tested on our Paul Hart-calibrated TV7/U for shorts

They have 939 and 252 date codes

This new old stock-testing Sylvania 6N6G tube was tested on our Paul Hart-calibrated TV7/U for shorts