Sovtek 12AX7 12AX7A ECC83 7025 Triple 3 Mica Vacuum Tube And Ronald Wolf new in box RCA 5AM8

new in box RCA 5AM8 tubes tested to spec on our Paul Hart-calibrated TV7/U

They tested 53

a horseshoe getter and terrific flashing

I am playing it in one of my ArtSound monoblocks as I write and it is absolutely silent

This matched pair of Sylvania black plate 12BY7 / 12BY7A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Sovtek 12AX7 12AX7A ECC83 7025 Triple 3 Mica Vacuum Tube And Ronald Wolf new in box RCA 5AM8This Sovtek 7025 (lower gain 12AX7 ECC83) 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 40 44 where minimum (65%) is 32 32 and 100% is 49 49. It has outstanding silkscreening; a third mica spacer for increased vibration resistance and lowered microphonics; was made in China; has excellent flashing and a foil getter. I am playing it in one of my ArtSound single