Matched Pair RCA USA 5751 NOS NIB Black Plate, D-Getter, Triple Mica Tubes

- Very RARE, Matched Codes Pair

Ruggedized Broadcast version of 12AX7 Designed to withstand Shock & Vibration

Triple Heavy Mica, Black Plates, Welded D-Getters; Support Rods; Use of gold-plated grids for reduced grid emission; 

50-hour aging on all tubes before final test.

Tubes Test +++NOS with closely Matched triode sections

Tubes are closely Matched on TV-2/u

Tube 1 - Triode 1/2: 116% / 112%

Tube 2 - Triode 1/2: 114% / 112%

Tubes are Fully Guaranteed as Described and Pictured.  

New in Original 1970 Military Boxes

Due to recent changes in worldwide Shipping services, Please contact for shipping options and prices for your country.

***Shipping to Greece, Norway, Poland, Turkey is $26.95 with Tracking

Tubes will be packed securely and shipped via Canada Post Air Parcel (Canada); USPS Priority (USA); Asendia Global Tracking (Europe / Asia) 

Please email with any questions before bidding.