background image

ITEM 

DESCRIPTION 

QTY/UNIT 

PART NUMBER 

Crossarm Assembly 

28829-501 

Element 6.85 in. 

21910-040 

Element 7.30 in. 

21910-041 

Element 7.80 in. 

21910-042 

Element 8.35 in. 

21910-043 

Element 8.95 in. 

21910-044 

Element 9.60 in. 

21910-045 

Element 10.30 in. 

21910-046 

Element 11.05 in. 

21910-047 

10 

Element 11.85 in.  

21910-048 

11 

Element 12.80 in. 

21910-049 

12 

Element 13.75 in.  

21910-050 

13 

Element 14.85 in. 

21910-051 

14 

Mounting Bracket, Vertical 

28859-501 

15 

U-Bolt 

20041-001 

16 

Mounting Bracket, Horizontal 

28860-501 

LPD-12 REPLACEMENT PARTS 

*Spare hardware for these items is included for the installers convenience. 

Summary of Contents for LPD-12 225-400

Page 1: ...tapered from the front of the antenna to the back and successive dipole halves are transposed along the antenna transmission line An internal cable in one of the crossarm sections functions as a balun to convert the balanced 50 ohm input at the front of the an tenna to 50 ohm unbalanced coaxial N type connector mounted at the rear of the antenna This internal balun effectively chokes off the surfa...

Page 2: ...G H PLANE 75 DEG VSWR MAX 1 5 1 TERMINAL TYPE IMPEDANCE N 50 OHM MAX POWER 500 WATTS LENGTH 79 50 IN 201 93 CM LONGEST ELEMENT 26 75 IN 67 95 CM WEIGHT 14 LBS 6 35 KG MOUNT MAST DIA Up to 3 00 in 7 62 cm WINDLOADING 85 Knot with 1 2 in 1 27 cm Radial Ice 109 lbs 49 44 kg ELECTRICAL MECHANICAL ...

Page 3: ...ning you should ground your equipment 1 To ground the antenna attach a ground wire under the head of the 3 8 16 x 3 1 4 in long hex head screw at the mounting bracket see Figure 2 Run the ground wire down the mast to a ground rod driven at least 4 feet into the ground 2 Keep the antenna and cable a safe distance from any power lines Antenna Mounting 1 Loosely assemble the two 3 8 diameter U bolts ...

Page 4: ...Horizontal Mounting Bracket Detail ...

Page 5: ... Element 9 60 in 2 21910 045 8 Element 10 30 in 2 21910 046 9 Element 11 05 in 2 21910 047 10 Element 11 85 in 2 21910 048 11 Element 12 80 in 2 21910 049 12 Element 13 75 in 2 21910 050 13 Element 14 85 in 2 21910 051 14 Mounting Bracket Vertical 2 28859 501 15 U Bolt 2 20041 001 16 Mounting Bracket Horizontal 1 28860 501 LPD 12 REPLACEMENT PARTS Spare hardware for these items is included for the...

Reviews: