RCA Clear Top 6211 Vacuum Tube For Your Bottlehead February 10 2022 new in box 956 tubes

new in box 956 tubes tested to spec on our Paul Hart-calibrated TV7/U

The TV7- tubes measured 60

It measured a nicely-balanced 52/50 where minimum (65%) is 40/40 and 100% is 62/62

They tested 50/46 and 52/45 where minimum (65%) is 40/45 and 100% is 62/69

In addition

RCA Clear Top 6211 Vacuum Tube For Your Bottlehead February 10 2022 new in box 956 tubesThis RCA clear top 6211 dual triode was tested on our Hickok 800 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 3200 3100 micromhos. (New 6211s typically test within one to 1. 5 standard deviations of 3600 micromhos like their 12AT7 cousins). It was also tested on our Maxi Preamp II (as a 12AT7) for shorts, gas, dynamic range, transconductance and gain. There were no shorts, noise or gas and it tests as