• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

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6V6 SE triode/UL switchable

Hello all,

Here is the most recent build on the workbench.
 

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Neat balanced headphone amplifier from Bottlehead. Uses 12AU7 for power and two 6C45-Pi. This build features a powdercoated antique copper top plate, copper-leaf wood base, big 10uF Jupiter capacitors, and classy Cardas copper wire.

Enjoy the pics! Build log with lots more photos and details here.

Bottlehead-Mainline-Interior-2.jpg


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Bottlehead-Mainline-Finished.jpg

Looks like a million dollars! Incredibly nice build, I love the smooth control plate and knobs WOW!
 
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Neat balanced headphone amplifier from Bottlehead. Uses 12AU7 for power and two 6C45-Pi. This build features a powdercoated antique copper top plate, copper-leaf wood base, big 10uF Jupiter capacitors, and classy Cardas copper wire.

Enjoy the pics! Build log with lots more photos and details here.

Bottlehead-Mainline-Interior-2.jpg


Bottlehead-Mainline-Interior.jpg


Bottlehead-Mainline-Finished.jpg

Incredible build, happy to see that also art is being taking serious here, chapeau.
 
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Single ended EL85 amplifier

This is what I build last week :D
2 watts per channel EL85 single ended 'power' amplifier, based on the RH84 rev.2 (with auto bias) schematics by A. Kitic.
ECC81 driver, with an EZ80 for rectification.
Featuring 5 watt Hammond output transformers, power transformer is custom made at HB amp design in Germany.
Uses 33 watts in total which isn't much considering it's a class A tube amplifier!
Sound quality is really neat.
 

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I built a preamp

Full tube consruction. 6C5S rectifier, ECL85 / 0B2 voltage regulator and line level amplifier with 6N2P-EV and 6N6P.
 

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My first preamp project.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.



ECC83/E88CCtubes at this point in time.
I have russian 6n2p-EV/6n6p too.

separate tone adjust, balance, bass output level adjust, program selector and mastervolume pot.

Yes. amplifier has two sets of outputs. Full frequency and the other is 40hz 18db/octave low-bass filter,with level adjust.

back row is the operating voltage rectifier and regulator.
5U4S/ECL85/0B2 from artosalo.


And my third power amp.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.


6F12P cathodyne driver/KT77 pentode connected PP powerstage. And GZ34 rectifiers.

Bad english. Google translator :D
 
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