Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB Zenith Drawer Tube One measured 1630 micromhos

Tube One measured 1630 micromhos

wire snubbers for lowered microphonics

1 milliamps while it measured 2380 micromhos where new US-made 6L6s typically test with plate current from the low 20s to mid 30s and with transconductance from 2200 micromhos or so

milspec Sylvania JHS-12AT7WA (12AT7 / ECC81) dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

This matched pair of French Amperex 6BL8 pentode/triode tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair General Electric GE 6C4 6C4WA Vacuum Tubes Milspec NOS NIB Zenith Drawer Tube One measured 1630 micromhosThis perfectly matched pair of 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 72 where minimum (65%) is 55 and 100% 85. 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 68 26 188 5 67 50