rectifier tube 274b 5r4gyb specs comparison

In addition, when changing to a higher output rectifier in a 'self biasing' (aka 'cathode biased' amp, eg, Champ and others) never assume that the power tube(s) is/are safe. Always check the new B+ voltage against the maximum ratings of the capacitors. NEVER make this type of swap in an amp with 15+ year old power supply capacitors (in reality, you should never operate an amp with 15+ year old power supply caps anyway). Rebiasing of your power tubes is absolutely required. When changing from a lower output to a higher output rectifier, the new higher B+ voltage may pose a danger for the filter caps in your amp. Often, there's no problem using them but caution should be exercised. Using a rectifier which requires higher filament current than the rectifier your amp was designed for, pose a potential risk of power transformer overheating. Every amp and each type of power tube has different limits so there are no general rules that apply universally.Īll of these will 'work' in the sockets intended for any of the other ones on this list.Ĭautions: Most of these require 2 amps of filament current, the 2 exceptions are listed. They're all interchangeable within limits. Two-channel system: Makeshift Roon endpoint/server (an iPad or a laptop) -> AudioQuest Diamond USB cable -> Chord BLU-DAVE -> PS Audio BHK Signature PreAmp -> PS Audio BHK 300 Monoblocks -> MartinLogan CLX Art.4) 5V4G/A (Possibly lower if plate current of the power tubes is high enough) Other headphones: Focal Utopia (the original version) JPS Labs Abyss AB-1266 OG. Other amps: Eleven Audio Formula S w/PowerMan Woo Audio WA-234's (the older ones, w/6SN7 drivers). CDs are played on a PS Audio PerfectWave SACD Transport -> I2S via HDMI -> Holo May. All power cables are various grades of High Fidelity Cables (the magnetic ones with the big waveguides in the middle), attached to a PS Audio P20. Concurrently we have the May -> High Fidelity Cables Ultimate Reference Helix XLR -> HiFiMan Shangri-La Amplifier -> HiFiMan Shangri-La Headphones.

Primary system: Modem -> NetGear Orbi mesh router -> NetGear daughter node -> JCAT/Telegärtner M12 Gold > Innuos STATEMENT -> Göbel Lacorde Reference USB cable -> Holo Audio May KTE DAC -> High Fidelity Cables Pro RCA -> Woo Audio WA-33 JPS Labs Elite Edition (current tube complement: Raytheon 5842's, KR Audio 2A3's & a USAF 596) -> JPS Labs Superconductor headphone cables -> JPS Labs Abyss AB-1266 TC.

Rectifier tube 274b 5r4gyb specs comparison