Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB 1821A NOS NIB new in box 1X2 tubes

new in box 1X2 tubes tested to spec on our Paul Hart-calibrated TV7/U

This perfectly-matched pair of milspec GE 6C4 6C4WA triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 95%/93% and 95%/94% for Tube Two

This LP is in very-good shape with very little noise

210 5213 and no provenance/date codes

Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB 1821A NOS NIB new in box 1X2 tubesThis perfectly matched pair of new old stock, new in box milspec GE 6C4 6C4WA triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Both tubes measured 69 where minimum (65%) is 55. They have gray plates; top O getters and two additional support rods for increased ruggedness and microphony suppression. These tubes have acid etched codes and designations as well as silk screened 67 05 67