Tungsram ECC83 / 12AX7 Black Plate Top Ring Getter Amplitrex Tested

Tungsram ECC83 / 12AX7 — Pair of Vintage Black Plates

Rare Black Plate Construction
Top Ring Getter
Military-Grade Reliability
Amplitrex AT1000 Verified

Presenting a premium pair (2 pieces) of vintage Tungsram ECC83 / 12AX7 vacuum tubes. These tubes feature the esteemed Black Plate construction and Top Ring Getter, highly regarded by audiophiles for their exceptional detail, wide dynamic range, and robust European build quality.

Each tube has been meticulously tested on a calibrated Amplitrex AT1000 professional tube analyzer. These units qualify for our Gold Grade, ensuring they meet or exceed standard operational parameters for high-end audio performance.

Serial No.	Test Triode	Parameter Ip mAdc	Result Ip mAdc	% Ip	Parameter Gm uMhos	Result Gm uMhos	% Gm
#1185001	T1	1.2	1.3	108.3%	1600	1800	112.5%
	T2	1.2	1.7	141.6%	1600	1900	118.7%
#1185003	T1	1.2	0.8	66.6%	1600	1300	81.2%
	T2	1.2	1.3	108.3%	1600	1700	106.2%

Technical Note: Percentage values are relative to original factory NOS specifications (1.2mA / 1600uMhos). These tubes exhibit strong emission and are ready for service in critical audio stages.

International Shipping: Buyers are responsible for any applicable customs duties, import taxes, or VAT.