JJ / Groove Tubes 12AX7 ECC83 7025 GTECC83 Vacuum Tube Vacuum Tube Valves Realistic / Radio Shack-BRANDED 12AU6

Realistic / Radio Shack-BRANDED 12AU6 tube tested to spec on our Paul Hart-calibrated TV7/U

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This paperback book is in very good shape

Its only flaw is an inscription on the first blank page

JJ / Groove Tubes 12AX7 ECC83 7025 GTECC83 Vacuum Tube Vacuum Tube Valves Realistic / Radio Shack-BRANDED 12AU6This 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