Matched Pair JJ 12AX7 ECC83 ECC83S Low Noise Vacuum Tubes Valves NOS NIB ECF80 T35 and if it is

and if it is

These lot of six new old stock

I am playing them in my Mini Mite 2013 and they sound great

Oh Sweetheart

This is a new old stock

Matched Pair JJ 12AX7 ECC83 ECC83S Low Noise Vacuum Tubes Valves NOS NIB ECF80 T35 and if it isThis new old stock, new in box matched pair of JJ low noise 12AX7 ECC83 12AU7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: Tube One: 44 48 Tube Two: 46 48 Minimum (65%) is 32 32 and 100% 66 66. These tubes have excellent silkscreening; excellent flashing and O getters. Their filaments are spirally wound hence the "S" in "ECC83S" for low noise