4 US-Made 6211 Vacuum Tubes Lot Of Four Sylvania NOS NIB This matched pair of General

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

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

IN NEARLY 9000 SALES

This lot of five Toshiba-MANUFACTURED 8FQ7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

4 US-Made 6211 Vacuum Tubes Lot Of Four Sylvania NOS NIB This matched pair of GeneralThis 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).