M2 Antenna Systems 6-30LP11, Assembly Manual

BEFORE YOU BEGIN: Look over the ELEMENT ASSEMBLY sheets to get familiar with the various 
parts of the log periodic.  These written instructions attempt to give some order and efficiency to the 
overall assembly and make you aware of critical areas.  TWO CUPS OF ZINC PASTE HAS BEEN 
PROVIDED AND SHOULD BE USED AT EACH JOINT WHERE MACHINED PARTS JOIN 
ALUMINUM RODS OR TUBES AND GENERALLY AT EACH ELECTRICAL CONNECTION POINT. 

WE ALSO STRONGLY RECOMMEND THAT EACH BOLT AND SCREW USED, BE TOUCHED IN 
THIS PASTE WITH THE FIRST FEW THREADS.  THIS WILL PREVENT GAULING AND BETTER 
TIGHTENING OF THE STAINLESS HARDWARE

. 

 
THIS IS A VERY LARGE ANTENNA WHEN COMPLETELY ASSEMBLED.  WE SUGGEST YOU 
ASSEMBLE THE ELEMENTS FIRST AND WHEN DOING THE LARGER ELEMENTS, ASSEMBLE 
THE TIP SECTIONS UP TO THE 1-1/2” SECTIONS, MARK AND SET ASIDE UNTIL THE BOOM IS 
ASSEMBLED AND THE INNER SECTIONS 2” DIAMETER AND LARGER ARE MOUNTED ON 
THE BOOM.   
 
THE LONGEST 3 ELEMENTS ARE BOXED INDIVIDUALLY TO MAKE IT EASIER TO IDENTIFY 
AND ASSEMBLE  THE CORRECT ELEMENT SECTIONS. 
 
BEGIN ASSEMBLING THE SMALLEST ELEMENTS FIRST TO ESTABLISH A “ROUTINE” 

REFER TO THE ELEMENT 4 THOUGH 11 ASSEMBLY SHEET 

1.  Locate five (5) 7/8 x 30” FIBERGLASS RODS and (10) POLY DISCS with 7/8” holes. Press a 

disc onto the end of a rod and slide it down until it is about 3/4” inside the INNER two 1/4” holes. 
Then slide another poly disc on from the other end of the rod and position it about 3/4” inside the 
other 1/4” hole. Repeat this for all five of the 7/8” FIBERGLASS RODS. Slight repositioning of the 
poly discs may be required when the element is mounted below the boom. 

ELEMENT #11 (Smallest) 

2.  Install a PHASE LINE CLAMP with 1” hole at the butt of the 1” x 60.75” element half with the two 

grooves facing the butt. Secure the clamp block temporarily using an 8-32 x 1-1/2” screw and 
locknut. Add a PHASING LINE CLAMP CAP to the PHASE LINE CLAMP using a 1/4-20 x 1” flat 
head bolt and locknut, but finger tighten only at this time. Repeat for the other #11 element half. 
Now slide each element half onto a previously prepared 7/8” FIBERGLASS ROD and align the 
holes. Secure with 1/4-20 x 1-1/2" bolt and locknut. Finally, align the grooved side of the clamp 
block assembly on each side with the NUT SIDE of the bolt holding each element half onto the 
rod. Position the clamp blocks about 1/2” from the end of the element butts and tighten the 8-32 x 
1-1/2” screws and locknuts securing the clamp blocks.  Use a marking pen to identify the element 
as #11. Element #11 is now complete and ready to be installed on the boom at a later time.  

ELEMENTS #10, #9, #8,  & #7   

3. These are very similar to #11. Follow the same procedure as in step #2. Follow the ELEMENT 

ASSEMBLY SHEET for the element information and the hardware needed.  Don’t forget  to use 
PENETROX (ZINC) PASTE on all aluminum joints and on the threads of the screws and bolts. 
Element #7 has a 1-1/8” outer sleeve but it still uses a 7/8” FIBERGLASS ROD and a PHASE 
LINE CLAMP with 1” hole for the phasing lines.  

6-30LP11 ASSEMBLY MANUAL