RCA Black Plate 6L6 6L6GC Vacuum Tube For Your Univalve Larry Ferrari Transconductance measured micromhos with a

Transconductance measured micromhos with a plate current draw of milliamps

This happens perhaps once -- maybe twice -- per decade

There is no dust jacket and I suspect there never was

000 VACUUM TUBES AND RELATED ANALOG AUDIO ITEMS

These are ultra-low-noise

RCA Black Plate 6L6 6L6GC Vacuum Tube For Your Univalve Larry Ferrari Transconductance measured micromhos with aThis RCA 6L6GC output tube was tested on our Maxi Matcher with 400 volts on the plates and a bias of 48 volts for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 1320 micromhos and it drew 63 milliamps' plate current. (New US made 6L6s typically test with plate current from the low 20s to mid 30s with transconductance from 2200 micromhos or so.) This tube tested above spec for plate current draw and below spec