COSSOR authorized production, made by PSVANE. The price is one COSSOR VALVE 274B vacuum tube.  If you need two, we provide the original factory matched All items guaranteed 100% BRAND NEW in the original edition Box. ONE-YEAR WARRANTY !!! 

COSSOR VALVE KT88 Hiend Vacuum tubes best matched A Pair NEW made by PSVANE replace 6550 100% Brand new Britain COSSOR authorized production, made by PSVANE. Notice: this is the Collection Gray version, it is  different with the Blue standard version the price is for one pair, if you need matched quad(4pic). you can make two pair we can provide the original factory  matched quad(4pic) The price is for A Pair of COSSOR VALVE KT88 Britain COSSOR authorized production, made by...

Psvane HIFI Series UK-KT88 /UK-EL34/UK-6SN7 are new-creation, never have the better cost-effective in the history of Psvane. After almost one year time, these HIFI UK Series vacuum tubes were come out by development team of Psvane The three model tubes are adopt the most UK sound charms of” Mould screen” plate material, and join into the symbolic music and the extremely emotional appeal sound performance of Psvane.this will be most music you hear with the same price of vacuum tubes.

PSVANE Vacuum Tube KT88-T II classic Grade Matched pair PSVANE KT88-T MK II tube 100% Brand New 1, PSVANE T-Collection series MK II use the Carbon Microcrystalline technology. Carbon Microcrystalline is a kind of very stable absorbent (material), and it has excellent heat transfer performance. Carbon Microcrystalline make up stabilization of the electrical performance inside of the Vacuum tube.  2, The PSVANE T-Collection series MK II tube socket is made with Teflon. It is very low...

845B is directly heated triode thorium-tungsten cathode, can be used for A1, AB1 class power amplifier. Filament heating U f: 10 V If: 3.25 A Limit Ratings Anode voltage: 1250 V Anode dissipation power: 75 W Maximum signal output power: 150 W Maximum anode current: 120 mA Electrode capacitance Input capacitance: 6 PF The output capacitor: 4.5 PF Cross-Road capacitors: 14.5 PF Static parameters Ua: 1250 V -Ug: 200 V Ia: 80 mA Gm: 3 mA / V ri: 1.7 KΩ u: -5 RL: 3.4 KΩ Ug (pk): --69 V...

The beam power quadrupole KT88 has an anode ultimate power dissipation of 42W. In the audio amplifier, two tubes can achieve 100W power for the AB1 push-pull output, and KT88 can also be used in the electronic voltage regulator circuit. KT88 is similar to CV5220 and 6550 and can be used interchangeably. Hot wire heating UH............ 6.3 V IH............ 1.6 A Limit rating ------------- --KT94 KT100 KT94 KT100 Anode voltage.................. 800 800 800 800 V Second gate voltage......... 600...

CV181-TII is double triode, used in voltage amplification circuit, Can be replaced directly by 6N8P and 6SN7GT. Heater UH: 6.3V IH: 0.6A Static Parameter Ua: 90 250 V Ug: 0 -8V Ia: 10 9 mA Gm: 3 2.6 mA/V Ri: 6.7 7.7 kΩ μ : 20 20 Ia: when Ug=-12.5V 1.3mA Ug: whenIa=-10uA - 7 -18V Maximum Rating class A1 Ua: 450V Ik: -20mA Pa: 5w Pa(No.1+No2): 7w Rg: 1MΩ Uhk: ±100V

Notice: the price is just for one tube,if you want to matched pair, please buy two tubes Some precautions about using high voltage power tubes:  Unlike other vacuum tubes such as KT88 or EL34, which typically run at 450V plate voltage, high voltage power tubes such as 845, 805 and 211 run at plate voltage 900V or even higher depending on your amp design. Due to the high voltage in the circuit, biasing an 845 / 805 or 211 amp improperly may expose you to lethal high voltage causing instant...

COSSOR VALVE 805 Hiend Vacuum tubes best matched A Pair NEW made by PSVANE 100% Brand new Britain COSSOR authorized production, made by PSVANE. The price is for A Pair of COSSOR VALVE 805 Britain COSSOR authorized production, made by PSVANE. Carbon Crystal II Generation Technology* Ten years ago, the Noble Voice R&D team applied carbon crystal technology to audio vacuum tubes. The carbon crystal II generation technology further enhances the heat conduction performance on the basis of the...