Ta det helt med ro, og hell opp et glass øl til nytelse. Da jeg brukte uttrykket "military grade", var det ikke med henvisning til hvordan kinesiske produsenter selv markedsfører røret, men heller med tanke på hvordan 5881-rør generelt omtales og beskrives i reklame og produktpresentasjoner. Dette underbygges av følgende eksempler hentet fra ulike nettsteder:Det er jo bare vås.
Ikke noe som heter eller kan kalles military grade ifm ny produserte rør.
Militæret kjøper ikke rør. Spesifiserer ikke heller.
Ingen tester rør mot militære spesifikasjoner.
Kan du vise sertifikatet på de Kina rørene?
Built to rigid military standards, the MH 5881 will tolerate higher voltages than any other 6L6. In fact, they're frequently used as replacements for the old 7027 model in vintage Ampegs. Extremely consistent from piece to piece, the 5881 is used by Marshall, Soldano, Solo and others.

5881 Valve-Tube
Like all of Mike Hill products this MH 5881 valve has been hand tested, listened to and matched using a test rig designed by Mike.
www.mikehillservices.com
Built to a standard reserved for the Military, these 5881 tubes will tolerate a higher voltage than a 6L6. Often used as an OEM tube for Marshalls, Soldano, Solo etc these tubes are renowned for delivering the tone that guitarist wants and expect from their tubes.

Sovtek 5881 Power Tubes
Sovtek 5881 Power Tubes available in singles, matched pairs and matched quads. Evatco carries all the parts you need for your guitar amps at great low prices. These 5881 are in sotck ready to ship today from Evatco's Brisbane warehouse

The Harma 5881 is the button based Russian military valve that powered the Marshall and Mesa Boogie amps( STR 425) in the late eighties. This valve has bullet proof reliability and proven track record over decades of use in Russian military applications.
So what is the difference between the 5881 tube and the 6L6GB tube? Answer: military ruggedisation. So the 5881 is built to withstand high g-forces as it was used in Russian fighter jets amongst other applications.

The Difference Between a 5881 and a 6L6GC Valve? | ampvalves.co.uk
6L6GC valve versus the 5881 valve. As manufacturers improved the design over the years as they discovered new ways to push up the power.

The russian 5881 was born as 6P3S-E in the Saratov plant and was designed for the use in military vehicles and aircrafts.

Russian tube 5881 / 6L6WGC / 6P3S-E "NOS". Matched pair
Russian tube 5881 / 6L6WGC / 6P3S-E "NOS". Matched pair
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