Psvane MK2 T-Series 274B Valve, Premium Grade, single valve

274B is very close in all spec details to 5U4G, 5Z3P and even 5AR4/GZ34. The 274B requires a filament current of 2A  which is lower than the 5U4G/GB or 5Z4P which would need 3A.

A 5AR4/GZ34 requires 1.9A only. Since that difference is very small most good designed amplifier power supplies should easily accept this. To replace a 5AR4 or GZ34 please refer to your amp's manual to make sure this minor increase in current can be tolerated by the amp's power supply before you use a 274B instead.

The Crystallized carbon coating technology used in vacuum tubes has been patented by Psvane Audio in China and is pending abroad. The benefit of the Crystallized Carbon coating will improve on absorbing random electrons inside the vacuum tube and dissipation of heat more efficiently under extreme temperatures, which will further enhance the stability of the vacuum tubes.

Teflon Base with Oxidized Aluminum Collar: instead of using a fragile ceramic base, the TII series tubes use low conductance and highly durable Teflon materials for the base (not including the guide pin in the middle) to improve on anti-corrosion and anti-breakage.  The brass-colour sandy Oxidized aluminium collar around the Teflon base is anti-corrosion as well – no more fingerprints and oxidization on the tube base with use, and your tubes will maintain a prestige condition for a long time.

Product logo engraved on the base, not printed on the glass enclosure: As many tube amps have tube sockets installed in various directions based on circuit layout, previously the printed logo on the black bottle tubes may face inconsistent directions. TII series have logo only engraved on the base so your amp will maintain a consistent and highly desirable appearance for all TII series tubes.

Higher quality glass enclosure: Higher quality glass is used for the new TII series to offer a better hand feel of the tubes, plus slightly heavier weight (approx 10% among all models) than the previous series.

Sound Quality: The new coating materials offer an even better music presentation in terms of minor 3D imaging improvement, layering and clarity. You will not lose anything in terms of sound by going for the latest and newest TII series.

Specifications: 

Heater
Uf: 5V
If: 2.5A
Maximum Rating
anode inverse peak voltage: 1550V
anode peak current: 750mA
Recommend working condition
Anode supply voltage: 2×500V
Each arm impedance: 75Ω
load impedance: 2000Ω
Filter capacitor: 4μF
Rectifier current: ≧220mA

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