Telefunken Smooth Plate 12AX7 ECC83 Vacuum Tube OA3 Gebraucht I am playing them in

I am playing them in my Musical Paradise MC-3 single-ended integrated amplifier (with adapters

This new old stock-testing matched pair of GE 12SN7GT dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

It has 0 26 date codes

new in box Sylvania 3Q5GT tube -- and another just like it -- tested to spec on Paul Hart-calibrated TV7/U

They measured 39

Telefunken Smooth Plate 12AX7 ECC83 Vacuum Tube OA3 Gebraucht I am playing them inThis Telefunken smooth plate 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 they measured as follows: It measured 38 36 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 62 2 code. I am playing it in my Pro Ject Tube Box S phono preamplifier with an