I have designed and built a (0.5) 1/2-watt single ended tube amp using two 12AX7 preamp tubes and one 12AU7 preamp tube as a power amp tube.  I selected the 12AU7 because it drives a higher current than a 12AU7.

The amp features selectable 8 or 16-ohm speaker outputs. It has one volume knob and one tone knob.  There is one brightness switch and one hi-gain switch which increases gain to the preamp.

I will build these for any one wishing for one, hand-wired and without a chassis box, for $400.  Paint color, pilot lamp color, knob style, and tube shield colors are negotiable.

VALVE Cmoy Hi-Fi Headphone amplifier FULL KIT 12AU7 & HAMMOND CASE INCLUDED

VALVE Cmoy Hi-Fi Headphone amplifier FULL KIT 12AU7 & HAMMOND CASE INCLUDED

Proudly Australian made Keep your money where you live ! Buy Australian! Nows your chance to build a genuine 12AU7 Valve amplifer You need a soldering iron, Solder and wire cutters and you can do this Special Guarantee If for any reason you cannot complete the amplifier It doesn’t work! It’s too hard! the dog chewed it! Whatever!! Send it back with $10.00 for postage and it will be fixed and…

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Headphones for PC Mp3 Mp4 PSP Audio Technica PRO SERIES 5 PRO502 Wireless Handheld Microphone System Grado Prestige Series SR225i Headphones (Discontinued by Manufacturer)
12AU7 TUBE CMOY Hi-Fi Headphone Earphone amplifier diy printed circuit board

12AU7 TUBE CMOY Hi-Fi Headphone Earphone amplifier diy printed circuit board

Proudly Australian made Keep your money where you live ! Buy Australian! The simplest way to make your own Tube amplifier, just the circuit board you customise the parts So cheap why buy just one? Parts list and instructions can be downloaded email for details Uses 12volts Dozens of these have been made easy to make and great fun This is for ONE pcb only Designed to fit the Hammond 1593 range of…

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New Version Bravo V2 12AU7 TubeValve Class A Tube Headphone Amplifier preamp

New Version Bravo V2 12AU7 TubeValve Class A Tube Headphone Amplifier preamp

New Version Bravo V2 12AU7 Tube Valve Class A Tube Headphone Amplifier preamplifier Description: This is a exquisite apperance Tube Class A Headphone Amplifier with acrylic plate installed in bottom and top. It is Pure Class A amplifier with Audiophile Performance. It brings you a powerful, dynamic and sweet TUBE SOUND from your headphone. You will be astonished by the improvement of sound…

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12AU7 TUBE CMOY Hi-Fi Headphone Earphone amplifier diy printed circuit board

12AU7 TUBE CMOY Hi-Fi Headphone Earphone amplifier diy printed circuit board

Proudly Australian made Keep your money where you live ! Buy Australian! The simplest way to make your own Tube amplifier, just the circuit board you customise the parts So cheap why buy just one? Parts list and instructions can be downloaded email for details Uses 12volts Dozens of these have been made easy to make and great fun This is for ONE pcb only Designed to fit the Hammond 1593 range of…

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DIY 12AU7 tube VALVE Cmoy Stereo Hi-Fi Headphone amplifier KIT Guaranteed !

DIY 12AU7 tube VALVE Cmoy Stereo Hi-Fi Headphone amplifier KIT Guaranteed !

Proudly Australian made Keep your money where you live ! Buy Australian! Nows your chance to build a genuine 12AU7 Valve amplifier You need a soldering iron, solder wire and wire cutters and you can do this Special Guarantee If for any reason you cannot complete the amplifier It doesn’t work! It’s too hard! the dog chewed it! Whatever!! Send it back with $10.00 for postage and it will be fixed…

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