5 Sylvania 14X7 Vacuum Tubes NOS NIB Lot Of Five

5 Sylvania 14X7 Vacuum Tubes NOS NIB Lot Of FiveThis lot of five new old stock, new in box Sylvania MANUFACTURED 14X7 tubes tested to spec on our Paul Hart calibrated TV7 U. Most loktals were made by Sylvania and these Philco BRANDED 14X7s are not an exception 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

Plate Current Draw: 31 Plate Current Draw: 34

54/53 and 54/55

60 and 82 where 40 is minimum

new in box GE 6DU3 / 6DQ3A tube tested to spec on our Paul Hart-calibrated TV7/U

new in box Philco 12BA7 tubes tested to spec on our Paul Hart-calibrated TV7

Here's a new old box

Transconductance: 1616 / 1526

copper support rods and gray plates

Transconductance measured an underwhelming-but-well-balanced 40/42 where minimum (65%) is 50/50 and 100% is 77/77

new in box matched pair of Sylvania 12SL7 / 12SL7GT dual triodes was tested on our Pau Hart-calibrated TV7/U for shorts

This (low side of) new old stock-testing Canadian GE 12SN7GT dual triode was tested on our Hickok 600A for shorts

Dynamic Range: -77