4 Sylvania 12AX4 12AX4GTA Vacuum Tubes Valves NOS NIB Lot Of Four Mozart Für Bläser

4 Sylvania 12AX4 12AX4GTA Vacuum Tubes Valves NOS NIB Lot Of Four Mozart Für BläserThese four new old stock, new in box Sylvania 12AX4GTA tubes 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

Both tubes have 2-48 SC 471 date/contract codes and are World War Two vintage

IN PRACTICE THIS MEANS YOU TAKE ON THE RESPONSIBILITY FOR THE LOSS IF THE PACKAGE IS MARKED AS "IN TRANSIT" OR AS "DELIVERED

Transconductance measured 58 for Tube One and 60 for Tube Two where minimum (65%) is 40

32 and 52 where minimum (65%) is 36 and 100% is 55

new in box GE 12JN8 tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 6EW6 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Matsushita-MANUFACTURED

This hard cover book is in very good condition

new in box milspec (US Navy) Raytheon CRP-78 number / type 78 tube tested to spec on our Paul Hart-calibrated TV7/U

These two Philco 6U7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Tube Four (diodes): 55/62

3 milliamps' plate current while Tube Two drew 19