Telefunken Smooth Plate 12AX7 ECC83 Vacuum Tube OA3 Gebraucht new in box International 6LF6

new in box International 6LF6 / 6MH6 tube tested to spec on our Paul Hart-calibrated TV7/U

28/27 and 33/26 where minimum (65%) is 18/18

They measured 39

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

Telefunken Smooth Plate 12AX7 ECC83 Vacuum Tube OA3 Gebraucht new in box International 6LF6This 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