JJ 12AX7 ECC83 ECC83S Low Noise Vacuum Tube With Box August 03 2022 new in box GE 26HU5

new in box GE 26HU5 tubes tested to spec on our on our Jackson 648

I have listened to all four LPs

This matched pair of RCA black plate triple mica 6CL6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

beefy black plates: side O getters

JJ 12AX7 ECC83 ECC83S Low Noise Vacuum Tube With Box August 03 2022 new in box GE 26HU5This low noise JJ 12AX7 ECC83S 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 a perfectly balanced 41 41 where minimum (65%) is 32 32 and 100% is 49 49. It has excellent silkscreening; excellent flashing and an O getter. Its filaments are spirally wound hence the "S" in "ECC83S" for low noise operation. I am playing it in my Pro Ject Tube Box S phono pre