millett-starving-student-hybrid-amp
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    I think I got a soft spot for black and white.
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    The final iteration of what started as a Millett "Starving Student" amplifier. More than 2 years after the start of this project, following countless redesigns and rebuilds, this amplifier is now much more than a Starving Student. (The price tag alone makes it everything but a Starving Student.) A p
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    The final iteration of what started as a Millett "Starving Student" amplifier. More than 2 years after the start of this project, following countless redesigns and rebuilds, this amplifier is now much more than a Starving Student. (The price tag alone makes it everything but a Starving Student.) A p
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    The final iteration of what started as a Millett "Starving Student" amplifier. More than 2 years after the start of this project, following countless redesigns and rebuilds, this amplifier is now much more than a Starving Student. (The price tag alone makes it everything but a Starving Student.) A p
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    The final iteration of what started as a Millett "Starving Student" amplifier. More than 2 years after the start of this project, following countless redesigns and rebuilds, this amplifier is now much more than a Starving Student. (The price tag alone makes it everything but a Starving Student.) A p
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    For the first time in half a year since I began this project, I am listening to music trough the MSSH and actually enjoying it. The noise level is now low enough to be forgotten even with my most sensitive headphones. I concluded the MSSH and the NFB-12 hate each others, and they will only be happy
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    Debugging session in December 2012. There was dirt in a tube socket, which allowed arcing between pins.
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    My setup in December 2012.
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    Mini2496+O2+MSSH
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    My Millett "Starving Student" Hybrid headphone amplifier, sitting atop the Audio-gd NFB-12. The enclosure I used for my MSSH is almost the same size as the NFB-12. It's the Hammond 1455T2201. I installed orange LEDs inside the tube sockets, but I used low intensity LEDs so they are useless. The tube
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    My Millett "Starving Student" Hybrid headphone amplifier. The whole circuit was built using Point to Point wiring. I designed and built a 48v linear regulated power supply for the amplifier. The transformer and the cubic heat sink beside it are part of the PSU. I built Faraday cages around the tubes
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    My Millett "Starving Student" Hybrid headphone amplifier. The whole circuit was built using Point to Point wiring. I designed and built a 48v linear regulated power supply for the amplifier. The transformer and the cubic heat sink beside it are part of the PSU. I built Faraday cages around the tubes
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    My Millett "Starving Student" Hybrid, complete and working circuit. I designed a 48v linear regulated power supply for this amplifier, it consists of everything behind the tube sockets.
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    My Millett "Starving Student" Hybrid, complete and working circuit. I designed a 48v linear regulated power supply for this amplifier, it consists of everything right of the tube sockets.
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    Finished reassembling the wiring for the tubes and the MOSFETs. This time the original layout was recycled. I also installed the back panel and some shields.
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    Finished assembling the power supply in the new enclosure. Since the case is shorter than the clear plastic one I had, the original layout did not fit. I rebuilt the power supply from the ground up. I placed the capacitors so they shield AC from the rest of the circuit.
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    Exploded view of my Starving Student. Everything is painted and ready for final assembly.
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    Hammond 1455 enclosure machined by hand.
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    Placing the amplifier on a grounded metal pan muted the hum.
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    First series of tweaks to my MSSH. Connected the 0V rail to earth with a 100Ω resistor. This eliminated the noise picked from the floating inputs. Doubled the value of R13 hoping to lower the back ground noise, it didn't change anything. Added an identical resistor in parallel with the one in
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    Picture of my head-fi setup.
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    Line in is wired using braided solid core copper. Physical power rails using 18 AWG solid copper. The 4 power decoupling capacitors are Nichicon ES MUSE.
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    My freshly finished SSMH on it's first test drive. View of the interior. The output coupling capacitors are Elna Silmic II. The inter-stage coupling capacitors are Mundorf M-CAP MKP Series.
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    My freshly finished SSMH on it's first test drive. View of the interior. The output coupling capacitors are Elna Silmic II. The inter-stage coupling capacitors are Mundorf M-CAP MKP Series.
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    My freshly finished SSMH on it's first test drive. The tubes are 12AX7.
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