uA6V6-2 — A 2W Single-Ended 6V6 Micro-Power Amplifier

The above micro-power Amplifier utilizes a small extruded Hammond Chassis, a 160V heavily filtered power-supply, a DC Filament supply, and a single 6V6 Power Tube to deliver ~2W into 8 ohms. It has a simple input Level control and a feedback Contour control.

The Contour control utilizes a specialized feedback arrangement to provide a tightening of tone of the single-ended stage for cleaner smoother characteristics, or when backed off allows for an open-loop single-ended overdrive tone.

Use of a 6V6 provides a very smooth and sweet overdrive tone when driven hard, or a silky smooth clean tone when backed off.

Micro-Power Amplifiers are typically utilized in studio-style signal chains to provide a nice final stage of tube-tone to the system. At 2W it is sufficient for driving a mic'ed speaker cab, or driving into a speaker-emulator load/attenuator and then into the mix. Inputs of the uA6V6 are at the high line levels, requiring ~+10dBu for full drive. The entire unit fits on a shelf within 3U rack height, and is ~9.25"W, ~3.25"D, and ~4.5"H. A small thermal resistant box is fitted over the vertically mounted 6V6 to allow ease of tube swapping, and good tube protection for handling, without the size and weight penalty of a full cabinet surround.

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