Hy-Gain THUNDERBIRD TH6-DX, Instruction Manual

Page: 6 / 22

Page 13
2-3 (Continued)
NOTE
The following steps will be in singular form. They will have to be done
first for one side of the boom then repeated for the other side. Also,
remember to coat each telescoping section with electroseal.
Select the tubing bundle marked "15-20 Ref". Insert the thick-walled end of
the RI section (1 1/4 x 95 1/2") into the element-to-boom bracket assembled on the
boom. Tighten the screws to hold the element securely but do not tighten the
anchor screws at this time.
Check to see that the 15-20 meter Reflector element will lie in a plane
parallel to the earth when the antenna is mounted on the mast. This can be
done by observing the position of the Reflector element with respect to the
boom-to-mast bracket and then adjusting the Reflector element accordingly.
Re-check the 3" measurement from the end of the boom to the center of the
bracket then tighten the anchor screws SECURELY.
Select a 1 1/4" compression clamp and its associated screw and square nut and
assemble as shown in Figure 7.
NOTE
Figure 7 shows all the compression clamps with their associated hardware.
The drawing is full size to aid you in identifying the parts. Simply lay the
part over the proper drawing for easy identification.
Slip the assembled compression clamp over the end of the R1 section about
1". Select the R2 section (1 1/8 x 38") and slip the unswaged end into the R1
section.
At this time you must decide which mode of transmission you wish to
favor, either Lo Phone, Hi Phone or CW. Measure dimension of R2 for
your mode of transmission as shown in Figure 6. The measurement is
made from the. end of R1 to the end of R2.
CAUTION
Once you have selected your mode of transmission (Lo Phone, Hi Phone or
CW) you must use the same mode for all remaining measurements. DO NOT
attempt to use Phone measurements on one element and CW