Matched Pair Sylvania 6C4 Vacuum Tubes Black Plates Copper Support Rods

Matched Pair Sylvania 6C4 Vacuum Tubes Black Plates Copper Support RodsThis almost perfectly matched pair of Sylvania black plate 6C4 triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 60 while Tube Two measured 62 where minimum (65%) is 55 and 100% 85. They have top D getters; copper support rods and nice flashing. They sound great in my Alan Eaton single ended 45 amplifier (with an adapter, not included). WE HAVE SCORES OF THOUSANDS

Enhanced Cooling: no

I ran it in my Dynaco Stereo 70 and it sounded great

Tube One measured 46 while Tube Two measured 48 where minimum (65%) is 25

28/27 and 33/26 where minimum (65%) is 18/18

This new old stock-testing Sylvania engraved base type 48 tube was tested our Paul Hart-calibrated TV7/U for shorts

Plate current draw: 20

They are the new

It measured 42 in its triode section where minimum (65%) is 25 and 100% is 39

ETSY DOES NOT HAVE A SYSTEM IN PLACE FOR THAT YET

Both measured 62 where minimum (65%) is 34

THERE IS A

54/54 and 54/54 where minimum (65%) is 40/40 and 100% is 62/62