4 US-Made 6211 Vacuum Tubes Lot Of Four Sylvania NOS NIB new in box Westinghouse 12EH5

new in box Westinghouse 12EH5 tubes

likely Tung-Sol-MANUFACTURED) measured 31 while Tube Two (no silkscreening 6AK5-LABELED

This matched pair of General Electric 12AU7A / ECC82 dual triodes was tested on our Hickok 600A for shorts

Tube One measured 1900/1900 while Tube Two measured 1900/2250 where new/nominal is 2200

4 US-Made 6211 Vacuum Tubes Lot Of Four Sylvania NOS NIB new in box Westinghouse 12EH5This quad of US made 6211 dual triodes was tested on our Hickok 800 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 2000 1900 micromhos for Tube One and 2000 2000 micromhos for Tube Two. Tubes Three and Four measured 2400 2650 and 2800 3200, respectively. (New 6211s typically test within one to 1. 5 standard deviations of 3600 micromhos and tend to be rather erratic readings wise like their 12AT7 cousins).