background image

12. OVERHEAD BOOM SUPPORT SYSTEM. 
 
Install a temporary mast if possible to get the overhead system just right before installing the antenna. 
 
 

Attach one end of the HPTG-4000 Philistran cable at the eyebolt at the REAR end of the boom. 
Install a thimble or cable eye in the eyebolt. Secure the cable using two 1/4” cable clips. Repeat at 
the other eyebolt.  Attach the turnbuckle plate to the mast about 5 feet above the boom to mast 
plate. Open the 3/8 forged JAW AND EYE turnbuckles till just one thread is showing inside the of 
the turnbuckle. Attach the JAW  end of each turnbuckle at the plate. Insert a thimble or cable eye 
in each turnbuckle eye and then attach the two HPTG-4000 cable, tensioning the cables and 
securing with two more clips on each. Do final boom straightening with the turnbuckles now or at 
the time of installation on the tower. 

 
13. Check ALL hardware for tightness. Check ALL element sections, especially tip sections, for correct 

placement. Make any final adjustments to linear loading tension. 

 
14. Attach feedline section to balun. Route from element #8, back to boom to mast plate. Secure at 

regular intervals with tape or nylon ties. 

 
15. When mounting this log periodic on a tower or mast with other antennas there may be interaction 

with other nearby antennas,  particularly if they are resonant in the 8 to 30 MHz band.  In general 
VHF and/or UHF antennas mounted for HORIZONTAL POLARITY should be at least 40 inches 
above or below the log antenna. Use good quality 50 Ohm feed line to feed the log and be sure 
your tower and rotator system can handle to wind area and weight of this antenna.  

 

THIS COMPLETES ANTENNA ASSEMBLY 

 
 

M

2

 

ANTENNA SYSTEMS, INC.

 

4402 N. SELLAND AVE. 

FRESNO, CA 93722 

(559) 432-8873  FAX: 432-3059 

www.m2inc.com

  Email: 

[email protected]

 

8-30LP9 ASSEMBLY MANUAL 

Содержание 8-30LP9

Страница 1: ... log periodic is a rugged versatile performer designed for years of trouble free service Ma chined aluminum element to boom clamps and solid fiberglass rod center insulators are just a few of the unique structural features in this remarkable antenna The 8 30LP9 is a single antenna system that matches up with today s modern solid state equipment Maritime Government Commercial MARS and Scientific us...

Страница 2: ...addles hold the 1 1 4 diameter fiberglass rod center insulators and the plates mount on the boom with 4 saddles Element 1 and 2 have 3 4 vertical support risers Element 3 does not The center insulator is 1 1 4 diameter Push on two 1 1 4 poly rings and center them at just over 6 apart Set this assembly on the 1 1 4 aluminum saddles and add the top saddles Hardware for this whole assembly is shown o...

Страница 3: ...s grounded to the boom A 7 8 x 30 sleeve couples the two 3 4 element halves together with the same bolts that hold the bottom saddles Assemble loosely at this time LOG PERIODIC ELEMENT ASSEMBLY 1 REFER TO ELEMENT ASSEMBLY SHEET 2 Start with the smallest elements Elements 8 7 6 and 5 are similar There are two halves to each element Do the following for both halves Locate and install a 1 hole ELEMEN...

Страница 4: ...clamp block with a 1 1 4 hole at 1 4 from the butt of the element Align with element hole as before and secure using an 8 32 x 1 3 4 screw and locknut Add the small clamp block and 1 4 20 x 1 flat head bolt and locknut loosely If it is not already there insert a 1 1 8 x 20 sleeve in the butt of the element and hold in place temporarily with a 1 4 20 x 1 3 4 bolt and locknut but don t tighten yet C...

Страница 5: ...8 30LP9 DIMENSION SHEET ...

Страница 6: ...8 30LP9 ELEMENT ASSEMBLY ...

Страница 7: ...f Open the 5 16 turnbuckles till just one thread shows inside the body of the turnbuckle Add a thimble to each turnbuckle eye and secure the cable at each turnbuckle with two clips 6 Element 1 is last and requires the most attention SEE LINEAR LOADED ELEMENT ASSEMBLY drawing This element is almost the same as 2 except for the linear loading Prepare the element as shown except for the linear loadin...

Страница 8: ...LINEAR LOADED ELEMENT ASSEMBLY ...

Страница 9: ... the rear plate on your first mark ALIGN the elements horizontal perpendicular to the eyebolts and tighten bolts EVENLY and firmly Use element 1 as the element alignment reference 10 Mount element 2 and align and tighten as before Note it is usually easier to begin installing the phasing lines at this time between each new element mounted Mount the next to the longest pair as shown on the dimensio...

Страница 10: ...buckles now or at the time of installation on the tower 13 Check ALL hardware for tightness Check ALL element sections especially tip sections for correct placement Make any final adjustments to linear loading tension 14 Attach feedline section to balun Route from element 8 back to boom to mast plate Secure at regular intervals with tape or nylon ties 15 When mounting this log periodic on a tower ...

Страница 11: ...ent section 3 4 x 049 x 48 SOE 2 Element tip section 3 4 x 049 x 52 50 2 Element tip section 3 4 x 049 x 33 00 2 Element section 1 2 x 049 x 62 0 2 Element tip section 1 2 x 049 x 60 0 2 Element tip section 1 2 x 049 x 58 50 2 Element tip section 1 2 x 049 x 53 625 2 Element tip section 1 2 x 049 x 45 0 2 Element tip section 1 2 x 049 x 34 0 2 Element tip section 1 2 x 049 x 32 0 2 Rod phasing 3 1...

Страница 12: ... 3 4 x 3 0 Delrin black 7 Linear loading arm 375 x 1 5 x 4 0 1 hole 4 LL Shorting bar halves 1 4 x 3 4 x 6 4 Insulator stabilizer bar 1 4 x 1 x 6 black ABS bar 2 Support arm for stabilizer bar 375 x 1 50 x 2 875 alum 1 1 4 hole 2 Turnbuckle plate 2 x 5 x 3 16 1 Balun mounting L bracket 2 x 4 5 x 1 8 1 Eyebolt 3 8 x 6 forged 2 Eyebolt 1 4 20 x 2 1 2 zinc 2 Turnbuckles 3 8 eye and jaw forged 2 Turnb...

Страница 13: ...20 x 1 1 2 stainless 8 Bolt 1 4 20 x 1 1 4 stainless 4 Bolt 1 4 20 x 1 stainless 4 Screw 1 4 20 x 1 countersunk flathead stainless 16 Nut 1 4 20 locking stainless 68 Screw 8 32 x 2 panhead stainless 6 Screw 8 32 x 1 3 4 panhead stainless 18 Screw 8 32 x 1 1 2 panhead stainless 26 Screw 8 32 x 1 1 4 panhead stainless 40 Screw 8 32 x 1 0 panhead stainless 42 Nut 8 32 locking stainless 132 Set screw ...

Отзывы: