Rare early NOS NIB 1962 PHILIPS Dario Miniwatt 12AX7 ecc83 Holland BIG O getter super strong best AMPEREX tube perfectly balanced Orange Hiwatt Marshall, preamp

Here for sale a nice, quite rare NIB NOS Philips Dario Miniwatt 12AX7 ecc83 super strong and tightly balanced.
It was made in the great Heerlen Factory, ( Philips Amperex) in Holland the first week of march in 1962.

This is the very first type of short plate built in this factory. Big O getter. The most sought after model. Said to be a bit bigger sounding.

Tests results   114 %   118 %

Code   I63 Δ2C1

Tube is new in top condition and provided with its original box.

Fully tested , including for sound, noise floor and microphony. All good .

Over full new specs. Super strong, nicely balanced , within 4 % so great even for stereo use or as a perfect phase inverter.

Very unique and detailed sound, astonishing and fantastic in high gain stage to get a more define and less muddy sound. Many vintage Marshall players love them even more than the more renowed british Blackurn.

Very sought after by audiophile also and pro recording studio for their clarity imcomparable 3D midrange ( Which is subtlety more present than Blackburn ones) this makes it an outstanding tube for guitar and vocal . It Has good bass and sweet pleasant highs too.


Let your Marshall, Orange, Hiwatt or any nice amp get its full original tone . Hear and feel the difference.

I COMBINE SHIPPING ,

 SO PLEASE HAVE A LOOK AT MY OTHER INTEMS AND SAVE .

Shipping cost includes tracking and insurance.

This tube has been tested 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 with a first tester
and then with a second tester ( Jackson 648S ) for
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.