Matched Pair RCA 12B4 12B4A Vacuum Tubes Black Plates Copper Support Rods NOS-Testing Veracini Scarlatti This Ken-Rad 6A7 tube was

This Ken-Rad 6A7 tube was tested on our Paul Hart-calibrated TV7/U for shorts

These seven 6A6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

2 milliamps' plate current while Tube Two drew 40

This album sounds very good only with occasional pops and ticks

The picture of the movement was taken before it was sent to be serviced

Matched Pair RCA 12B4 12B4A Vacuum Tubes Black Plates Copper Support Rods NOS-Testing Veracini Scarlatti This Ken-Rad 6A7 tube wasThis new old stock testing matched pair of RCA 12B4A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 43 while Tube Two measured 46 where minimum (65%) is 32 and 100% is 49. Wish I could tell you how they sound, but I don't have any equipment that uses these. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY