Matched Pair Sylvania 12AV7 Vacuum Tubes Valves Black Plate NOS NIB Stereo C5RS-7694-1

Matched Pair Sylvania 12AV7 Vacuum Tubes Valves Black Plate NOS NIB Stereo C5RS-7694-1This matched pair of new old stock, new in box Sylvania black plate 12AV7 dual triodes was tested on our Maxi Matcher for shorts, gas and gain. There were no shorts or gas. Gain (Mu) measured 31. 4 31. 9 for Tube One and 33. 4 31. 3 for Tube Two. (New 12AZ7s typically test within a standard deviations of 33). 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

(New US-made 6550s typically test with plate current from the low 20s to mid 40s with transconductance from 3500 micromhos or so

an anode radiator for cooler operation and longer tube life and a banded-cross top mica spacer

Tube Two measured 1750/23

new in box CBS 6AK6 tubes tested to spec on our Paul Hart-calibrated TV7/U

IN NEARLY 7000 SALES

top mica spacer

J-slot Cinch TS102U03 / SOS-6 tube shields fit 12AX7-size tubes nicely

a side-D getter

These five Ken-Rad-MANUFACTURED 6U7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

a thimble getter and excellent flashing

new in box Japanese Magnavox 10DE7 tube tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-testing RCA clear top 6CG7 / 6FQ7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts