Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB 1821A NOS NIB This LP is in very-good

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

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

210 5213 and no provenance/date codes

new in box Cunningham 35/51 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB 1821A NOS NIB This LP is in very-goodThis 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