Rare NOS NIB early 70's PHILIPS AMPEREX 12AU7 ecc82 DIMPLED DISC GETTER Heerlen perfect matched pair very strong, fully tested Superb sounding tubes !

Here for sale is a superb NOS NIB Philips Dario Miniwatt ecc82 tightly matched pair.

Made by Philips Amperex in the famous Heerlen factory in Holland, one in June 1970 and the other in august 1971. Both have the Heerlen delta factory code. Rare and highly sought after dimpled disc getter.

Tests results   tube 1 : 94 % 95 %

Tests results   tube 2 : 95 % 97 %

Code gf8 Δ0F1  and (gf8) Δ1H1

Super strong over full specs and tightly balanced.

Perfect for regarding stereo use.

Provided with their original Philips boxes.

Best tests for sound, noise and microphony. V1 grade, Tube mic grade.

When giving them my usual auditioning test for sound , noise and microphony prior to listing, I really appreciated the superb sound qualities of these tubes . Very musical.

Very unique and detailed sound.
Crystal clear clean with warmth.

Very sought after by audiophile and pro recording studio for their unrivaled 3D midrange ( Which is subtlety more pronounced than Blackburn ones) this makes it an outstanding tube for vocal . It Has good bass and sweet pleasant highs too.
Incredible sounding tubes in mic or line preamp , unbeatable on vocals but add some clarity and depth on anything.
Highly recommended also on mastering tube devices.

Top condition, look like new , sold as new or very few use.

I COMBINE SHIPPING ,

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

Shipping price 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 regularly tested for calibration.  Photos are part of the description you get what you see. ,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