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Category: Amplifier

Nekolab

Nocturne MKIII Tube Headphone Amplifier

  Three years ago I build the first version of Nocturne – a transformer coupled tube headphones amplifier – equipped with 6C45p triode and then last year a second version with a more performing ( and more gain ) D3a triode strapped, both intended to drive with excellent performance a AKG K550 back closed headphones ( 32 ohms, 114 dB sensitivity ). A few months ago I got to try a planar magnetic open back…

Attila 6C33cb SE Power Amplifier

The 6C33C-b is an attractive tube. This indirectly heated, high transconductance, high current capability and low internal resistance, inexpensive triode, from Russia, with a large 60W anode dissipation, originally designed as a voltage regulator for the avionics in Russian military aircraft, it is the ideal “high current” triode for audio applications. The downside? The 6C33C-B requires a relatively high anode current (typically 180-220mA at 180-210V) a high heater current ( 3,6 A with filaments connect…

Madama Butterfly 2A3 SE Power Amplifier

Another 2A3 SE amp !!!! oh no !!!! What in the added value in my implementation? What I present in this blog is the result of many, many….. hours of listening sessions to various configurations and components about a SE class A 2A3 Amplifier. My target was the best design to reproduce the body, sonic texture and fine gradation characteristic of natural sound. This is what, in my opinion, is the best result in terms…

Falstaff Hybrid Circlotron Power Amplifier

     ‭ ‬ There has been considerable debate over the characteristics of tubes versus transistors…..The goal of this hybrid power amplifier is to take advantage of best performance of both technologies tubes and solid state device.‭ ‬Tube is highly linear without negative feedback,‭ ‬smooth clipping,‭ ‬wider dynamic range,‭ ‬characteristics highly independent of temperature,‭ ‬and so on‭…‬but its disadvantages such high-impedance devices that usually need a matching transformer for low impedance speakers.‭ ‬I prefer to…