Telefunken ECH81 Vacuum Tube Valve

Telefunken ECH81 Vacuum Tube ValveThis Telefunken ECH81 6AJ6 was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. It measured 70 59 where minimum (65%) is 50 50 and has the Telefunken diamond (<>) embossed in its base. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE

milspec Sylvania 5Y3GT/G / JAN-CHS-5Y3GT/G / VT-197A rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts

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

Transconductance measured 3900/4500 micromhos

Tube Two (Ameco-BRANDED) measured 21

Transconductance measured 1170 micromhos for Tube One and 1870 for Tube Two

The dynamic range and Mu readings

IF YOUR COUNTRY IS SIMILAR

where the range is from 33-43

64 and 72 where minimum (65%) is 45 and 100% is 69

This Matsushita 12FQ7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

anode radiators for cooler operation (and longer tube life) and hot-stamped/engraved bases

It measured 45/40 where minimum (65%) is 40/40 and 100% is 62/62