Sylvania 14AF7 Vacuum Tube NOS-Testing 10 Lot Of Ten They have 3-13 188-5 and

They have 3-13 188-5 and 3-26 188-5 date/provenance codes

These four Philco clear bottle type / number 41 tubes tested as follows on our Paul Hart-calibrated TV7/U:

72/76 and 92/90 where minimum (65%) is 50/50 and 100% is 77/77

This new old stock-testing matched pair of RCA 12B4A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

plate current

Sylvania 14AF7 Vacuum Tube NOS-Testing 10 Lot Of Ten They have 3-13 188-5 andThis new old stock testing Sylvania 14AF7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and it measured as follows: 51 49 where minimum (65%) is 33 and 100% is 51 51. 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