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Some month
later the front plate was finished. I only had to do the final surface
finish. Being no specialist in this field I took the front plate to
the local shop with the proper tools.
They also
did the anodising job providing a very neat surface.
The text
on the front plate is made using silk screen transfer. |
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On
the left side we find AF gain and IF gain. I like to be able to change
the gain directly, and prefer manual controls for these functions.
The button
marked Multi however hides a small mechanical encoder, which connected
to the controllers second encoder input, enables software control of
vox and mic gain settings. The encoder has a pushbutton function by
which I can toggle to the desired function.
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The tuning
button on the right hand side is machined as well. Made from aluminium
it has weight as a small flywheel giving a nice touch to the tuning.
To the
right is the power switch which also controls the display backlight.
Two of the
five pushbuttons in the top controls bandwidth and noise reduction on a
small reboxed audio DSP unit.
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All
buttons and handles have been selected to match the design. Knops are
made to fit on sprocket shafts, however the small mechanical
shaft encoder had its own
ideas.
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When everything else fails
try Araldite - it works very well on encoders too. |
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The tuning encoder has 512
steps. I found a shaft encoder from Agilent, which is made to fit on 8
mm shafts. Therefore I made this small unit from aluminium.
The ball bearings in
combination with the flywheel weight of the tuning button gives a very
nice feeling. |
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The pushbuttons must fit
exactly in the holes. The supporting PCB's was made after several
trials. I simply printed the PCB drawing to check if things was right. |
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The tuning encoder and
supporting PCB's are finally mounted in holes planned from the drawing
phase. |
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