DIY 6V6 SE-UL Tube Amplifier Schematic

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DIY 6V6 SE-UL Tube Amplifier Schematic - Lacewood

DIY Single-Ended Ultra-Linear 6V6 Tube Amplifier

This amp is designed to provide high quality music for an office or small den. It uses two 6V6 tubes in a single-ended (SE) ultra-linear (UL) configuration with a warm 6SN7 driver to give great music quality. The power transformer and power chokes are made by Hammond and the output transformers are made by Edcor. This amplifier uses an ultra quiet power supply to ensure zero hum and great detail.

SE-UL 6V6 Tube Amplifier Schematic showing Both Channels

In this amplifier, the 1k resistors in the driver stage can be bypassed by 50 uF capacitors to increase overall sensitivity

Power Supply Schematic

The schematic uses a 350 ohm power resistor to limit the B+ such that old style 6V6 tubes can be used. This resistor may be safely omitted if only 6V6GT type tubes are used.

Full information on this amplifier build can be found on the 6V6 Lacewood Amp project page. Comments and questions about the amp are welcome in the 6V6-6SN7 Humless "Lacewood" Amp thread.

About the Author

Matt Renaud is a career Electrical Engineer with over 25 years experience in advanced radio frequency system design. He has a passion for tube audio and teaching tube based circuit design to others through participation in tube audio forums and his own website, www.CascadeTubes.com. The majority of his designs are fully original and may be found on his website and on this forum. Here are a some DIY audio projects and articles contributed by Matt: