Matched Pair General Electric GE 12SL7 12SL7GT Vacuum Tubes Valves NOS NIB Philharmonia OUR SHIPPING RESPONSIBILITY ENDS WHEN

OUR SHIPPING RESPONSIBILITY ENDS WHEN THE PARCEL IS ACCEPTED AND SCANNED BY THE US POSTAL SERVICE

new in box GE 1821A / Z-1879A is still sealed in its plastic baggie

They are dead quiet when the preamp is muted and sound good even with 6

This Tung-Sol 6L6GC was tested on our Maxi Matcher 2 for shorts

Matched Pair General Electric GE 12SL7 12SL7GT Vacuum Tubes Valves NOS NIB Philharmonia OUR SHIPPING RESPONSIBILITY ENDS WHENThis new old stock, new in box matched pair of GE MANUFACTURED 12SL7 12SL7GT dual triodes was tested on our Pau Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 38 41 for Tube One and 42 41 for Tube Two (RCA LABELED) where minimum (65%) is 32 32. These tubes have copious bottom flashing, bottom, D getters, steel plates and steel suppost rods. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES.