3 Sylvania 12AB5 Vacuum Tubes Valves NOS NIB Lot Of Three

3 Sylvania 12AB5 Vacuum Tubes Valves NOS NIB Lot Of ThreeThese three new old stock, new in box Sylvania 12AB5 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

" "Water In The Lake

They have black/dark gray plates

These tubes have four shiny copper support rods

Tube One measured 31 while Tube Two measured 32 where minimum (65%) is 22

Transconductance measured 56/56 for Tube One and 58/58 for Tube Two where minimum (65%) is 25/25 and 100% is 38

new in box RCA 12HG7 / 12GN7 / 12GN7A tubes tested to spec on our Paul Hart-calibrated TV7/U

Tube Two Transconductance: 2610

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

beefy black plates: side O getters

It has a sheet getter

55 and 55 where minimum (65%) is 30 and 100% is 46

Transconductance measured 82 for Tube One (6AU6A) and 84 (6AU6) for Tube Two where minimum (65%) is 58