United Electron 31LQ6 Vacuum Tube Valve NOS NIB

United Electron 31LQ6 Vacuum Tube Valve NOS NIBThis new old stock, new in box United Electron 31LQ6 tube tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS

likely Tung-Sol-MANUFACTURED) measured 33 where minimum (65%) is 22

almost-perfectly-matched pair of RCA (Hewlett-Packard By RCA) 6AG7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

5 record cleaner and played on my Rega Planar Three

new in box Sprague TVL-4712 capacitor tested is rated 20 and 15 mfd at 450 volts and 20 and 20 mfd at 20 volts

4 milliamps' plate current while Tube Two drew 21

milspec Sylvania 3Q5GT / JAN-CHS-3Q5GT / VT-221 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 12AF6 tubes tested to spec on our Paul Hart-calibrated TV7/U

There were no shorts or gas and they measure as follows:

Thery measured as follows where minimum (65%) is 39: 52

This loosely-matched pair of new old stock-TESTING Tung-Sol-MANUFACTURED 6BG6G output tubes was tested on our Maxi-Matcher with 400 volts on the plates and a bias of -48 volts for shorts

9 milliamps where new 6L6GCs typically test with plate current from the low 20s to mid 30s and transconductance from 2200 micromhos or so

They measured (from left to right) 51/50