6 US-Made 6S4 6S4A Vacuum Tubes Valves Lot Of Six Rita Marshall

6 US-Made 6S4 6S4A Vacuum Tubes Valves Lot Of Six Rita MarshallThese six US made 6S4A tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measure as follows: 40, 51, 64, 66, 74 and 80 where minimum (65%) is 52 and 100% is 80. 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

It measured 40/40 where minimum (65%) is 40/40 and 100% is 62/62

This GE-MANUFACTURED

side-D getters

They tested (from left to right) as follows: 44

though they are labeled differently

top mica spacer

45/49 and 48/48 on our Paul Hart-calibrated TV7/U where minimum (65%) is 40/40

They have shoulder / ST bottles

These are beautiful tubes

66 and 71 where minimum (65%) is 42

This Sylvania-MANUFACTURED

There were no shorts or gas and it measured 42 where minimum (65%) is 26