5 General Electric GE 6SF7 Vacuum Tubes Valves Lot Of Five 6AC7 Octal OM2 copiously-illustrated book is in excellent

copiously-illustrated book is in excellent condition

This new old stock-testing matched pair of milspec/industrial Tung-Sol 6098 / 6AR6WA output tubes was tested on Paul Hart-calibrated TV7/U for shorts

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

(New US-made 7408s typically test with plate current from the mid-teens to mid-30s with transconductance from 2300 micromhos or so

These five US-made 6F5s were tested on our Paul Hart-calibrated TV7/U for shorts

5 General Electric GE 6SF7 Vacuum Tubes Valves Lot Of Five 6AC7 Octal OM2 copiously-illustrated book is in excellentThese 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.