Instruction manual

DDF1  36
FINAL CASE UP
OK… Now that you’ve completed testing and setting up your DDF1 it’s time
to make it look pretty. This is the final phase of you trip.
CASE ASSEMBLY
1. Place the main circuit board in the top half of the case and secure it in
place using the 8 4-40x1/4 inch screws.
2. Notice that the bottom of the case has a bunch of holes drilled in it.
Find the speaker and mount it over the holes using the 2 black 6-32
screws and 6-32 nuts. Tighten the screws in place.
3. Plug the wire from the speaker into J4, the 2 pin connector near the
speaker input jack on the main board. It doesn’t matter which way it is
plugged in.
4. Place the top and bottom of the case together and use the six(6) 4-40
x 3/8 self tapping screws to secure them together.
FINAL ANTENNA SYSTEM ASSEMBLY
1. Make 6 small notches to fit over the cables on the bottom edge of the
plastic cap for the antenna switch board. You can use a sharp hobby
knife, side cutters or a hot tool such as your soldering iron. Melting with
an iron will be smelly… use your ingenuity here.
2. Use hot glue or silicone calking and apply a bead around the base of
the caps to attach the cap and seal the cable entry areas. You may also
want to seal around the whip antennas.
TROUBLESHOOTING INSTRUCTIONS
While we had hoped that it wouldn’t come to this, if you are having trouble
with your direction finder, here are a few suggestions.
Use a methodical, logical troubleshooting technique. Most problems can be
solved using common sense. A volt-ohm meter and a clear head are usually
all that are needed to correct any problem. Over 95% of problems with kits
returned for repair are due to misplaced parts and/or bad solder connections.
Working backwards through the assembly steps will often lead you to the
problem. We also suggest having someone else check over your work as it
is very common to miss an error several times and you will get even more
frustrated.
If you call our tech support for help please be sure to have the unit in front of
you and also have a multimeter available. If you have an oscilloscope avail-
able that might also be helpful. Please understand that due to the complex-
ity of the DDF1 it may be difficult to troubleshoot over the phone but at lest it
will possible to get immediate real time information. If you decide to contact
us by email it will be even more difficult and time consuming because we will
need to ask questions and wait for answers numerous times.