Very rare 1971 NOS NIB La Radiotechnique EZ80 6v4 MULLARD label super strong perfect balanced best rectifier for Vox AC4

Here is a very rare  NOS NIB EZ80 6v4 made in France at the Chartres factory by La Radiotechnique the second week of Janurary 1971
KC5 model, nice construction .The Mullard foreign made label and print is still nice and date factory code intact.
New, top conditon and can't be better balanced !
This is the perfect rectifier.
  Tests results
                                  120 % 120%   so extra strong too.  

Provided in its original Mullard "Kradlepak" box
This is real gold for VOX AC4 any early British amp of this era  and later ones or other devices too, of course.

I COMBINE SHIPPING ,  SO PLEASE HAVE A LOOK AT MY OTHER ITEMS AND SAVE .

These tubes has been tested with a first tester for

Heater filament test: Short circuit
Heater filament test: Open circuit
Heater filament test: Tolerance check
Heater cathode insulation: Leakage
Heater cathode insulation: Short Circuit
Tests for heater current abnormalities
Amplification factor
Voltage gain
Power gain
Screen grid test
Mutual conductance test
Dual test for double triodes
Emission
Inter electrode leakage
Inter electrode short circuit
Flash-over (arc detection, high voltage breakdown)
Gas ionisation test

and then with a second tester ( Jackson 648S ) for

Leakage

Filament

Circuit

Shorts

Plate

Life test...

The Jackson 648. It is definitely one of my favorite tube testers. While it does not employ a mutual conductance test circuit, it does use an advanced emission circuit that applies separate element voltages to each tube element, and separate load circuits are also used. “These voltages and loads have been carefully selected for each tube to meet most ideally the normal operating condition of the tube.” (Source: 1950 Jackson catalog.)

In my experience, the Jackson circuitry is very effective, and often will surprise you with accuracy that approaches Hickok’s coveted “mutual conductance” test method. ( Source tubesound web site.)

I do my best to test and describe the tubes the best I can.

Note that test results may vary from one tester to an other so this must be taken as an indication, although my Jackson is regularly tested for calibration.

But if any problem (never happened yet ) please contact me first.

Thank you for your interest.