Instruction manual

DDF1  13
1 Main PC board (DDF-1)
1 Antenna switch board (ANTINT-1)
4 Antenna boards (ANTMTG-1)
REQUIRED ITEMS (But Not Supplied)
1 Length of RG58 cable for connecting between your radio and the
DDF1. (Not supplied due to unknown length required!)
1 Length of 5(or more) conductor control cable such as CAT5 LAN
cable (Not supplied due to unknown length required!)
Hot glue or silicone RTV sealer/adhesive
RAMSEY Learn-As-You-Build KIT ASSEMBLY
There are numerous solder connections on the DDF1 printed circuit board.
Therefore, PLEASE take us seriously when we say that good soldering is es-
sential to the proper operation of your direction finder!
 Use a 25-watt soldering pencil with a clean, sharp tip.
 Use only rosin-core solder intended for electronics use.
 Use bright lighting, a magnifying lamp or bench-style magnifier may
be helpful.
 Do your work in stages, taking breaks to check your work. Carefully
brush away wire cuttings so they don't lodge between solder con-
nections.
We have a two-fold "strategy" for the order of the following kit assembly
steps. First, we install parts in physical relationship to each other, so there's
minimal chance of inserting wires into wrong holes. Second, whenever possi-
ble, we install in an order that fits our "Learn-As-You Build" Kit building phi-
losophy. This entails describing the circuit that you are building, instead of
just blindly installing components. We hope that this will not only make as-
sembly of our kits easier, but help you to understand the circuit you’re con-
structing.
For each part, our word "install" always means these steps:
1. Pick the correct part value to start with.
2. Insert it into the correct PC board location.
3. Orient it correctly, follow the PC board drawing and the written
directions for all parts - especially when there's a right way and a
wrong way to solder it in. (Diode bands, electrolytic capacitor polar
ity, transistor shapes, dotted or notched ends of IC's, and so forth.)
4. Unless otherwise instructed, ALL components should be placed
snugly against the board.
5. Solder all connections unless directed otherwise. Use enough
heat and solder flow for clean, shiny, completed connections.
6 . Trim or “nip” the excess component lead wire after soldering.
Save some of the trimmed leads for later use.