RCA 1B3 1B3GT 1G3 1G3GT Vacuum Tube Valve NOS NIB

RCA 1B3 1B3GT 1G3 1G3GT Vacuum Tube Valve NOS NIBThis RCA 1B3GT 1G3GT 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 UP TO $250 IN VALUE. IF AN ITEM

TV7/U readings are in (parenthesis)

Side Four is more like a 6

There were no shorts or gas and they measured 44 and 46 where minimum (65%) is 31

This lot of five GE 12CR6 tube tested to spec on our Jackson 648 Mutual Conductance tester and come in a sleeve

5 milliamps Plate current draw: 21 milliamps

excellent flashing and three horizontal holes underneath and parallel to the plates' short axes

Transconductance measured (From left to right): 42

These ten US-made gray glass 6D6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Top: smooth

GM-LABELLED 6R7GT tubes in this lot

new in box matched trio of GE-MANUFACTURED 12B4A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box US-made 38HE7 tubes tested to spec on our Paul Hart-calibrated TV7/U