TELEFUNKEN ECC88 / 6DJ8
GRADE: GOLD SERIES | LABORATORY VERIFIED NOS MILITARY SPEC
Genuine Telefunken (Made in Germany)
Diamond Bottom Logo
Small Ring Getter
Black Plate Construction
Clear Glass
New in White Box
Amplitrex AT1000 Tested
Diamond Bottom Logo
Small Ring Getter
Black Plate Construction
Clear Glass
New in White Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pieces) of vintage Telefunken ECC88 (6DJ8) dual triode tubes, brand new in white boxes. Made in Germany, these ultra-rare audio tubes feature authentic Diamond Bottom glass molding, small ring getters, and premium black plates with clear glass. Highly sought-after by audiophiles worldwide for their legendary resolution, silky highs, and vast soundstage.
As shown in, both tubes have been thoroughly tested on our laboratory-grade Amplitrex AT1000 tester. The measured plate current (Ip) and transconductance (uMhos) results are calculated against standard factory specifications (15.0 mA / 12500 uMhos) and detailed in the table below.
| Serial No. / Markings | Tube Section | Plate Current (Ip) | Transconductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Factory Spec | Result | % Ip | Factory Spec | Result | % Gm | ||
| TFK ECC88 SR: 4253001 |
Triode 1 (T1) | 15.0 mA | 9.6 mA | 64% | 12500 uMhos | 11200 uMhos | 90% |
| Triode 2 (T2) | 15.0 mA | 9.4 mA | 63% | 12500 uMhos | 10900 uMhos | 87% | |
| TFK ECC88 SR: 1789018 |
Triode 1 (T1) | 15.0 mA | 8.6 mA | 57% | 12500 uMhos | 11000 uMhos | 88% |
| Triode 2 (T2) | 15.0 mA | 8.2 mA | 55% | 12500 uMhos | 10510 uMhos | 84% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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