Matched Trio Sylvania 12BY7 12BY7A Vacuum Tubes Cunningham Type Tube Two measured 3120/27

Tube Two measured 3120/27

beefy black plates: three mica spacers for improved mechanical stability and low microphonics

7 and 1830/20

This matched pair of Sylvania 6DE4 rectifier tubes was tested on our Paul Hart-calibrated TV7/U for shorts

It has an anode radiator for cooler operation and longer tube life

Matched Trio Sylvania 12BY7 12BY7A Vacuum Tubes Cunningham Type Tube Two measured 3120/27This matched trio of Sylvania 12BY7 12BY7A tubes was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 54 while Tube Two measured 57. Tube Three measured 58. (Minimum (65%) is 46. 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