5 General Electric GE 6SF7 Vacuum Tubes Valves Lot Of Five 6AC7 Octal OM2 These four milspec Sylvania 5Z4

These four milspec Sylvania 5Z4 rectifier tubes were tested on our Paul Hart-calibrated TV7/U for shorts

It measured 50/46 where minimum (65%) is 40/40 and 100% is 62/62

Tube One measured 42 while Tube Two measured 44 where minimum (65%) is 27

copiously-illustrated book is in excellent condition

5 General Electric GE 6SF7 Vacuum Tubes Valves Lot Of Five 6AC7 Octal OM2 These four milspec Sylvania 5Z4These five GE 6SF7 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They tested as follows: 56 32, 66 35, 74 55, 77 52 and 82 48 where minimum (65%) is 50 40. 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.