Here for sale a quite rare perfectly matched very nice pair of Toshiba el84 6bq5 . Made in Japan.

Tests results 88 %

So healthy strong tube.

Sought after tube either for high end hifi or guitar amp for their sweet and warm sound.

They are often called the Japan Mullard. They have ineed this warmth can nice sweet character.

I found them to have some similarities to the excellent Brimar too, with which they share close construction and tone. Fluid and very pleasant to listen even after long hours.

Really great sounding tubes.

It would be perfect to warm up and sweeten the tone of an agressive AC4 type amp while giving rich harmonics and musical break up tone when pushed.

You can see that like the Mullard el84 Thoshiba el84 have some brown marks that appear on glass after some use.

Nice used condition.

Ring getter, l rectangular hole in plate, non copper post, copper rods.

Highly recommended tubes to also bring back life to boutique amps missing a bit of vintage flavour.

Note those measurements are even stronger than ones found on many unused vintage and modern el84...

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

These tubes has been tested with a first digital tube 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: my trustfull 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 regulary tested for calibration.

 Photos are part of the description you get what you see.