JJ / Groove Tubes 12AX7 ECC83 7025 GTECC83 Vacuum Tube Vacuum Tube Valves new in box National Union

new in box National Union 14X7 -- and another just like it -- tested to spec on our Paul Hart-calibrated TV7/U

You must indicate the quantity you want

I am playing it it in my Bottlehead Crack headphone amplifier as I write and it sounds great

This paperback book is in very good shape

It measured 41/41 where minimum (65%) is 50/50 and 100% is 77/77

JJ / Groove Tubes 12AX7 ECC83 7025 GTECC83 Vacuum Tube Vacuum Tube Valves new in box National UnionThis JJ MANUFACTURED, Groove Tubes LABELED 12AX7 7025 GTECC83S dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and it measured 36 46 where minimum (65%) is 32 32 and 100% is 49 49. It has excellent silkscreening; excellent flashing and an O getter. I am playing it in my Pro Ject Tube Box S phono preamplifier with an Ortofon X5 MC high output moving coil cartridge as I write and