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Page 27
CHAPTER THREE
SECTION 3.0
DIRECTOR 1 EHU (continued)
ATTACH THE ELEMENT MOUNTING PLATE—DIRECTOR 1
The DB42 Driven loop element is 49 feet in length. The other two loop elements (REF& DIR 2) on the
DB42 are 39 feet in length. There is a reason for this— by having the middle loop element 49 feet, it
electrically makes the two end elements perform as if they are 49 feet in length too. This is the he ba-
sis for one of the SteppIR patents and is fundamental in the outstanding performance the DB42 delivers
on the 40m and 30m bands while being 40% shorter than a full sized Yagi on those bands.
The construction of the Director 1 element is the most complex portion of the DB42 installation process.
To make life easier for the installer, we have condensed this procedure into four separate sections.
Figure 3.02
shows the items required for installing the element mounting plate for the Driven element.
Detailed instructions follow.
Key
QTY
Part
Number
Description
A
4
60-0066
5-1/6” X 4” Hex head bolt
B
4
10-1601-41 2-1/2” Aluminum saddle half
C
4
60-0046
5/16” Nylock nut
D
1
10-1605-11 Element mounting plate
E
2
10-1606-01 Reinforcing plate
F
4
10-1613-11 1/4” Aluminum spacer
A
A
D
A
A
B
B
B
B
C
C
C
C
E
E
FIG. 3.02
F
D
F
F
FIG. 3.03
