Telefunken 12AX7 ECC83 Vacuum Tube Ribbed Plate For Your Univalve Or Bottlehead 12AU7 ECC82 new in box Tung-Sol 25Z6GT

new in box Tung-Sol 25Z6GT tube tested to spec on our Paul Hart-calibrated TV7/U

This Moss Music Group DBX pressing has no surface noise but a very few pops and ticks

Both tubes measured 30 where minimum (65%) is 22

There was no gas

new in box Philco 7A5 tube tested to spec on our Paul Hart-calibrated TV7/U

Telefunken 12AX7 ECC83 Vacuum Tube Ribbed Plate For Your Univalve Or Bottlehead 12AU7 ECC82 new in box Tung-Sol 25Z6GTThis Telefunken ribbed plate ECC83 12AX7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas, noise, transconductance and gain. There were no shorts, noise or gas. It measured 39 42 where minimum (65%) is 32 32 and 100% is 49 49. It has excellent flashing and a chunky O getter. Its base has the requisite Telefunken diamond embossed with a "24" code with a backwards "7" below it. I am playing it in my Pro Ject Tube Box S phono