RCA Clear Top 6211 Vacuum Tube For Your Bottlehead February 10 2022 DB and CV batch codes

DB and CV batch codes

In addition

All of these tubes have very-good-testing triodes and each has a strong-testing as well as a functioning diode

Transconductance measured 44 and 48 where minimum (65%) is 35 and 100% is 54

5 volts with adapters (not included) and they sound tremendous even though they straddle the cusp and are running with a lowered filament voltage

RCA Clear Top 6211 Vacuum Tube For Your Bottlehead February 10 2022 DB and CV batch codesThis 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