4 RCA 50Y6 Vacuum Tubes Valves NOS NIB Lot Of Four 12JT6 Compactron great flashing and 63-48 188-5

great flashing and 63-48 188-5 and 64-13 188-5 factory/date codes

new in box National Union 25Z5 tubes tested to spec on our Paul Hart-calibrated TV7/U

Tube One measured 47/44 while Tube Two measured 48/43 where minimum (65%) is 25/25 and 100% is 38

old-fashioned Coke bottle

This lot of three Sylvania-MANUFACTURED number 19 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

4 RCA 50Y6 Vacuum Tubes Valves NOS NIB Lot Of Four 12JT6 Compactron great flashing and 63-48 188-5This lot of four RCA 50Y6 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 ITEMS UP TO $250 IN VALUE. IF AN