RCA Clear Top 6211 Vacuum Tube For Your Bottlehead February 10 2022

RCA Clear Top 6211 Vacuum Tube For Your Bottlehead February 10 2022This 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

In addition

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

It has shiny 17MM black plates

4-17 188-5 and 2-48 188-5 date/provenance codes

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

DB and CV batch codes

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

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

This milspec / industrial-grade Sylvania JAN-CHS-5932 / 6L6WGA output tube was tested on our Maxi-Matcher 2 for shorts

The TV7- tubes measured 60

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