Amperex

Amperex ECC88 = 6DJ8 PQ Dimple Disc Getter Matched Quad - Holland '74 - Strong

$238.90 USD

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Soundlumia's Opinion

With strong performance and pristine condition, this special set of vintage tubes are priced to sell! Many tube sound enthusiasts bought Orange Globe 6DJ8's as their first pair of vintage tubes to replace their JJ stock tubes...right here at Soundlumia's eBay store, and we believe it's the best choice they've ever made just like many others among us audiophiles.

You get the "textbook" Amperex Holland midrange presentation that is transparent, natural and expansive, with a slight touch of warmth that illuminates your musical world. The top end is super airy, smooth and nicely extended like one would expect from the best Siemens tubes. Vocals are intimate, sweet and forward (but not right in your face) and that always reminds me how the vocals sound on the best Mullard tubes. Bass is deep and well controlled and the accuracy feels very similar to the high end German ECC88's (Siemens, Telefunken.)

Professional testing & sound evaluation

This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:

Tube 1:

Measured transconductance(GM): 9.99/10.27 mA/V - 80%/82% (100% = 12.50 mA/V)

Measured plate current(IA): 10.725/11.617 mA - 72%/77% (100% = 15 mA)

Tube 2:

Measured transconductance(GM): 10.11/10.15 mA/V - 81%/81% (100% = 12.50 mA/V)

Measured plate current(IA): 11.1/12.382 mA - 74%/83% (100% = 15 mA)

Tube 3:

Measured transconductance(GM): 10.78/10.95 mA/V - 86%/88% (100% = 12.50 mA/V)

Measured plate current(IA): 13.312/13.747 mA - 89%/92% (100% = 15 mA)

Tube 4:

Measured transconductance(GM): 9.61/9.8 mA/V - 77%/78% (100% = 12.50 mA/V)

Measured plate current(IA): 11.04/10.53 mA - 74%/70% (100% = 15 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance & cosmetic condition

we treasure this pair because the pristine cosmetic condition the two tubes are in - over 90% of the paint is intact. The Heerlen date codes etched on glass are perfectly visible on both tubes. What a rare find! The Orange Globe logo is also visible on one of the tubes as well.

GAG ⊿4C4 (⊿ = Heerlen, NL, 4 = 1974, C = March, 4 = Week #4 of the production month)

GAG ⊿4D1 (⊿ = Heerlen, NL, 4 = 1974, D = April, 1 = Week #1 of the production month)

GAG ⊿4C4 (⊿ = Heerlen, NL, 4 = 1974, C = March, 4 = Week #4 of the production month)

GAG ⊿4B1 (⊿ = Heerlen, NL, 4 = 1974, B = February, 1 = Week #1 of the production month)

Packaging

New white tube boxes.