RCA VINTAGE TUBE LOT – 6201 TRIO + 7025 PAIR (5 PCS TOTAL)

GRADE: VINTAGE NOS | PREMIUM HIGH-RELIABILITY 12AT7 & LOW-NOISE 12AX7 | MADE IN USA
RCA Radiotron Tubes 3x RCA 6201 (12AT7 / ECC81) 2x RCA 7025 (12AX7 / ECC83) Top Ring Getters Clear Glass Envelopes Made in USA Original & White Boxes Amplitrex AT1000 Tested

Up for sale is a premium 5-piece combined lot of genuine vintage NOS RCA dual triode vacuum tubes, manufactured in the USA. This lot includes a matched trio (3 pcs) of RCA 6201 (heavy-duty, high-reliability industrial version of the 12AT7 / ECC81) complete in original RCA Radiotron boxes, and a matched pair (2 pcs) of RCA 7025 (ultra low-noise, non-microphonic industrial version of the 12AX7 / ECC83) in individual white boxes. All tubes feature clear glass construction and top ring getters, delivering lush vintage midrange, outstanding gain stability, and silent operation. An incredible package deal for audiophiles and guitar amplifier technicians.

All five tubes have been fully tested on a precision Amplitrex AT1000 tube tester. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specs are detailed in the tables below.

1. RCA 6201 Matched Trio (Reference Specs: Ip = 10.0 mA | uMhos = 5,500)

Serial No. Triode Section Plate Current (Ip) Mutual Conductance (uMhos)
Ref Spec Result % Ip Ref Spec Result % uMhos
SR.NO.4869001 Triode 1 (T1) 10.0 mA 8.0 mA 80% 5500 5600 102%
Triode 2 (T2) 10.0 mA 7.6 mA 76% 5500 5360 97%
SR.NO.5445006 Triode 1 (T1) 10.0 mA 8.4 mA 84% 5500 5170 94%
Triode 2 (T2) 10.0 mA 8.6 mA 86% 5500 5410 98%
SR.NO.5445007 Triode 1 (T1) 10.0 mA 11.4 mA 114% 5500 5900 107%
Triode 2 (T2) 10.0 mA 8.6 mA 86% 5500 5570 101%

2. RCA 7025 Matched Pair (Reference Specs: Ip = 1.2 mA | uMhos = 1,600)

Serial No. Triode Section Plate Current (Ip) Mutual Conductance (uMhos)
Ref Spec Result % Ip Ref Spec Result % uMhos
SR.NO.2956030 Triode 1 (T1) 1.2 mA 1.1 mA 92% 1600 1700 106%
Triode 2 (T2) 1.2 mA 1.1 mA 92% 1600 1600 100%
SR.NO.2956028 Triode 1 (T1) 1.2 mA 1.3 mA 108% 1600 1800 113%
Triode 2 (T2) 1.2 mA 1.3 mA 108% 1600 1800 113%

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

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