MFJ-1768 Dual Band Yagi Instruction Manual
5
[ ] One bundle of short elements for the 440 MHz band (eight of them)
GROUP 2
- Two 6 3/8" x 1/4" short tubes
- Two 11 3/8" long........................................D..........................Red
- One 11 1/2" long.........................................E..........................Yellow
- One 11 7/8" long.........................................F...........................Black
- One 11 5/8" long.........................................G...........................White
- One 13 3/4" long.........................................H...........................Green
3- Insert eighteen of the 3/16" ID black insulators using your thumb into the designated
holes on the sides of the 1-1/8" boom.
Refer to figure on inside front cover and figure 2 to locate the designated holes and the installation
example
4- Lay the antenna boom on a flat surface, a table perhaps, with the feed plate facing up.
5- Refer to Figure 3 and start the assembly of the driven elements as follows:
A- The 2 meter driven element:
Align the holes drilled on the end of a 19 1/4" x 1/4" tube with the 4-40 screws located on the
rear end of the feed plate (
see figure 3 for exact location
). Insert the 4-40 screws into these
holes. Thread 4-40 nuts over the two screws and tighten to ensure good connections. Repeat
the same procedure for the remaining 19 1/4" x 1/4" driven element.
B- The 440 MHz driven element:
Align the holes drilled on the end of a 6 3/8"" x 1/4" tube with
the 4-40 screws located on the front end of the feed plate (
see
figure 3
for exact location ). Insert the 4-40 screws into these
holes. Thread 4-40 nuts over the two screws and tighten to
ensure good connections. Repeat the same procedure for the
remaining 6 3/8" x 1/4" driven element.
FIGURE
1
FIGURE 2