GE 5814A / 12AU7 / ECC82 - SINGLE TUBE (1 PC)

GRADE: GOLD SERIES | VINTAGE USA MILITARY-SPEC TRIPLE-MICA DUAL TRIODE WITH BLACK PLATES & TOP RING GETTER

Made in USA GE 5814A / Premium 12AU7 Green Print Black Plates Top Ring Getter Triple Mica Construction New in White Box Hickok 752A Tested

Up for sale is a single (1 PC) vintage NOS GE (General Electric) 5814A premium dual triode vacuum tube, packaged in a white box. The 5814A is General Electric’s military-spec, ruggedized drop-in upgrade for any standard 12AU7 / ECC82 circuit. Featuring classic GE green print, dark black plates, a heavy-duty triple-mica structure for microphonic resistance, and a top ring getter, this tube is prized by audiophiles for its exceptionally balanced tone, robust construction, and low noise floor. As shown, this tube has been thoroughly tested on a legendary Hickok 752A mutual conductance tube tester. Mutual conductance (Gm) measurements alongside percentage performance ratings relative to nominal factory specs are detailed in the table below.

Serial No.	Triode Section	Mutual Conductance (Gm)
Serial No.	Triode Section	Ref Spec	Result	% Gm
S/R NO. 528001	Triode 1 (T1)	2200 µMhos	2100 µMhos	95%
S/R NO. 528001	Triode 2 (T2)	2200 µMhos	2100 µMhos	95%

Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.

Precision Verified — NOS Audio Tubes