ozQRP DDS VFO 2, Руководство по монтажу

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DDS VFO 2 Construction Manual – Issue 1 Page 20
8 I
NSTALLING IN A
MST
8.1 F
RONT
P
ANEL
The DDS VFO is simply screwed to the inside of the front panel of the MST. The DDS VFO PCB is
set back from the panel using threaded spacers to allow room for the LCD. If you use the LCD
supplied in the kit the distance will be 22mm. This can be made up of a 10mm spacer and 12mm
spacer or a single 22mm spacer or a long screw and nuts.
A countersink screw is used on the front panel to provide a flush surface for the front panel
label to sit. If preferred round head screws can be used which means that holes need to be made
in the label and also the heads will be visible from the front.
If a LCD is used that does not incorporate a backlight it will not be as high and so the length of
the screws and spacers need to be reduced accordingly.
The general mounting arrangement is shown in Figure 5.
.
Figure 5 Installing in a MST
12mm x 3mm tapped
nylon spacer
10mm x 3mm tapped
nylon spacer
3mm x 16mm C/S screw
Front panel
PCB
LCD
3mm x 6mm screw