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Updated!
The power supply schematic. |
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This is
the first version of the power supply printed circuit board. |
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The
modified +/- 15 Volt power supply printed circuit board, with 2x1000uF
to stabilize the power supply. |
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Pcb file
updated 2009.08.27 |
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Updated!
The potentiometer schematic. |
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This is
the printed circuit board with the volume potentiometer. |
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The
volume potentiometer printed circuit board, with a nice Alps audio
potentiometer. |
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Pcb file
updated 2009.08.27 |
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Updated!
The audio schematic. |
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The over
side of the main printed circuit board, we choose to make it double
sided to get a good groundplane. |
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The
bottom side of main pcb. |
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And this
is the finished main printed circuit board, with BUF634 and OPA627, as
we can't buy black gate capacitors any more we used the best audio
capacitors we could buy from RS components.
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Pcb file
updated 2009.08.27 |
Take a
look at the front of the finished amplifier, I am very pleased with the
design, and the impressive Neutrik 6,3mm headphone connector.
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This is
the back of the finished amplifier, we choose to let the audio signal
pass through the amplifier and have mounted it in the audio signal way
between the preamplifier and the power amplifier. This gives the
advantage of remote controlled signal source and volume. The
volume potentiometer in the amplifier is used to adjust the signal level
for the chosen in ear headphones. We use a 14 Volt AC, 500 mA wall
outlet from Conrad to power the amplifier. |
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Here is a look inside the finished amplifier, we have choosen to mount
heat sinks on the BUF634 even though it is not really necassary. |
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We
ordered the aluminum front and back plates from Schaeffer Apparatebau as
we are very pleased with their work. There is a link to the firm web
site on the Links webpage. |
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Cad
file updated 2009.08.27 |
