Matched Pair General Electric GE 12SN7 12SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing

Matched Pair General Electric GE 12SN7 12SN7GTA Vacuum Tubes Copper Support Rods NOS-TestingThis new old stock testing matched pair of General Electric GE 12SN7 12SN7GTA dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 82 82 and Tube Two measured 85 84 where minimum (65%) is 50 50. Both tubes have gray, ladder plates; side horseshoe getters; crenelated, gapped, top mica spacers with smooth sided rectangular bottom mica spacers; copper support rods

These four milspec National Union JAN-CNU-2X2 rectifier tubes were tested on our Paul Hart-calibrated TV7/U for shorts

46 and 50 where minimum (65%) is 35 and 100% is 54

marked for safe and easy insertion

terrific flashing and L2E date codes

new in box US-made 9001 tubes tested to spec on our on our Jackson 648

I can't tell if this relay is functional

This well-written diary details the attempted dehumanization of its author

new in box US-made 6F5s tested to spec on our Paul Hart-calibrated TV7/U

new in box Philco 6L7 vacuum tube tested to spec on our Paul Hart-calibrated TV7/U

It has dual D getters

balloon / globe Number / Type 36 tubes tested as follows on our Paul Hart-calibrated TV7/U:

This hardcover book is in very good condition and comes from a non-smoking household