M2 Antenna Systems 7-10-30LP8 UP-KIT Manuale utente

M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722

Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com

03/29/13

Rev.00

M2 Antenna Systems, Inc.

Model No: 7-10-30LP8 UP-KIT

FOR CONVERTING THE 10-30LP8 TO A 7-10-30LP8 'SKIP LOG'

OVERVIEW OF UPGRADE: Very little has to be done to your original 10-30LP8. In fact the only element

that you even work on is the longest element. If it is possible to remove just the rear element and leave the

rest of the antenna up, that would be the easiest. Please look over the ASSEMBLY DETAILS AND TUNING

CHART before beginning and familiarize yourself with the new parts to be added. Note the basic element sec-

tions do not change in any way.

Refer to the two “add-on” assembly drawings for screw and bolt sizes when not called out in the text.

NOTE: WHEN USING THE 5/64” ALLEN WRENCH PROVIDED BE SURE THAT IT IS FULLY INSERTED

INTO THE 8-32 SET SCREWS TO BE SURE FULL TORQUE CAN BE APPLIED WITHOUT STRIPPING

THE SET SCREW.

1. Begin by installing the VERTICAL SUPPORT TUBE. Remove the two center bolts in the element clamp

plates. Feed the 1/4-20 x 3 1/2 bolts through the clamp plate holes and add the 1/4-20 locknuts. Tighten se-

curely.

NOTE: If you have our early version log periodic, the bolt pattern may not match the square tube

holes. Place the square tube in position, mark the plate where the holes should be and drill 1/4" holes

through your clamp plates. Then assemble as noted above.

3. Next you should prepare each element half by adding the STABILIZER INSULATOR AND DUAL WING

SKIP SUPPORT ARMS. Then add the 3/4” AND 1/2” LINEAR LOADING ARMS. Do this by opening the 1" to

3/4" element joint on each element half and sliding on the parts to their approximate positions as shown. Then

reconnect the element joints. The white plastic rod insulators can be installed at this time in each support arm.

4. Place the element on a level surface with the support post up. FROM THE ELEMENT BUTT SIDE, feed a

3/16” x 72” LINEAR LOADING ROD through the flat support insulator and on to the un-insulated side of

the DUAL SUPPORT ARM until 5/8” extends beyond arm. Install (4) and tighten the (2) 8-32 x 1/4" set

screws locking this rod in place. Install two SHAFT RETAINERS, one at a time, onto this rod tip and snug

up to linear loading arm.

NOTE: to start the RETAINER, hold the 3/8 x 3" PUSH TUBE in your hand with one end between your

thumb and forefinger. Now center retainer on this end, “dish” into tube, and hold in place with the same

thumb and forefinger. Grasp the linear loading rod near the end with your other hand and firmly push the

retainer onto the rod.

5. In the same way, feed another 72” LINEAR LOADING ROD through the flat support insulator and on

through the white polyethylene insulator until 5/8” extends beyond insulator. Tighten the (2) 8-32 /4” set

screws locking the rod in the arm. Install two SHAFT RETAINERS, one at a time, onto this rod tip and

snug up to insulator. Install two 8-32 x 1/4” set screws into a 1/4” x 1/2” x 1” SPLICE BLOCK and install

block on 1/2” rod tip up against the retainers. Tighten set screw. Repeat for other element half.

6. Insert (2) 8-32 x 1/4” set screws into each remaining SPLICE BLOCK. Slide a splice

block 1/2” on the open ends of each of the rods just installed and tighten the set screw.

Now insert two more 3/16” x 72” rods per side into these SPLICE BLOCKS and tighten

the set screws.

7. Slide another 3/16” x 72” rod through the white insulators on the 3 arms beyond the dual

support arm. Insert the inner rod end into splice block at the dual support arm and tight-

en set screw. Now slide the second 72” rod in through the white insulators and connect

it at the spice block as before. SEE THE FREQUENCY CHART on the LINEAR LOAD-

ED ELEMENT ASSEMBLY DRAWING and select the desired center frequency for Ele-

ment #1. Cut this outer linear loading rod to the desired dimension. Position the outer-

most linear loading arm about 6” from tip. Space the other arms to support the rod at

equal intervals. Then tighten all clamp screws. Repeat for other element half.

8. Next, pre-assemble both pair of LINEAR LOADING SHORTING BARS using (5) 8-32 x

7/8” screws and locknuts. NOTE: THE BARS ARE NOT SYMMETRICAL IN THE CEN-

TER GROOVES. Now pass about 4” of HPTG-1200 through the CENTER groove and

back through the offset grooves so you have about 2-1/2 inches of cable end coming

back for later clamping. Using a tape measure, mark each rod at the “A” Dim. back from

where it attaches to the DUAL SUPPORT ARM. Slide a shorting bar set onto the rod

ends and position the shorting bar clamps at your “A” Dim. marks. Level the bars; equal-

ize the rod tension and begin tightening the outer screws. Once everything is straight

and aligned, tighten all 5 screws. Repeat for the other side.

NOTE: IF YOU WILL BE USING THIS ANTENNA FOR OPERATION BELOW 6.950 MHZ,

THEN DO NOT TRIM OFF THE EXCESS ROD BEYOND THE SHORTING BAR. CON-

SULT THE TUNING CHART FOR THE PROPER SHORTING BAR SETTING AND

THEN TRIM OFF EXCESS 5” BEYOND THE SHORTING BARS.

IF OPERATION IS DESIRED ABOVE 6.950 MHZ, THEN CUT THE EXCESS ROD MATE-

RIAL OFF AT 5” BEYOND THE SHORTING BARS.

EXCESS ROD MUST BE TRIMMED AS DESCRIBED ABOVE OR RESONANCE MAY BE

LOWER.

7. We have provided a new coil section to go across the rear element which is different from

some earlier coils. If this coil is different from your original, replace the original with this new

coil. FINAL CHECK ALL HARDWARE FOR TIGHTNESS.

THIS COMPLETES THE ASSEMBLY PROCESS.

NOTE: When mounting this log periodic on a tower or mast with other antennas

there may be interaction particularly if any of the other antennas are resonant in the 7 AND

10 to 30 MHz band. In general VHF and/or UHF antennas mounted for HORIZONTAL PO-

LARITY 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 We want you to enjoy operating the SEVEN AMATEUR

BANDS that this antenna covers not to mention all the other possible applications for this

versatile performer!

ASSEMBLY INSTRUCTIONS

7-10-30L8 DIMENSION SHEET

7-10-30LP8 ASSEMBLY DETAILS

7-10-30-LP8 LINEAR LOADING (TUNING)

DESCRIPTION QTY

Support post 3/4 x 11" square alum. Tube (welded) (M2ASR0253)..........1

Skip support insulator drilled with shoulder 1/2 x 1" poly (M2APL0037)....2

Skip support insulator drilled 1/2 x 1" poly (M2APL0038)..........................6

Splice block, 1/4 x 1/2 x 1 aluminum for 3/16 rod (M2APL0036)...............8

Skip support arm, dual wing, 3/8 x 1 1/2 x 5.750 (M2APL0020)................2

Skip, support arm 1/4 x 1 x 3.875 (3/4 and ½” holes) (M2APL0015).........4

Skip support arm 1/4 x 3/4 x 3.875 (1/2” holes) (M2APL0014)..................2

Insulator, stabilizer bar 1/4 x 1 x 6”, black ABS plastic (M2APL0200).......2

Support Arm for stabilizer bar, (1” hole) (M2APL0201)..............................2

Shorting bar halves, 1/4 x 3/4 x 5.875" (M2ASB0250) ..............................4

Strain Relief, Black Delrin (M2APL0100)...................................................2

HPTG-1200 x 36” Philistran.......................................................................2

Assembly manual.......................................................................................1

Linear loading rods, 3/16" X 72" ..............................................................12

HARDWARE

Turn Buckle, 1/4-20 x 4" zinc.....................................................................2

Bolt, 1/4-20 x 3-1/2” stainless ....................................................................2

Nut, 1/4-20 locking, stainless.....................................................................2

Screw, 8-32 x 1-1/2" panhead, stainless....................................................6

Screw, 8-32 x 1-1/4" panhead, stainless....................................................4

Screw, 8-32 x 1.0" panhead, stainless.....................................................16

Screw, 8-32 x 7/8” panhead, stainless.....................................................10

Nut, 8-32 locking, stainless......................................................................36

Set screw, 8-32 x 1/4 stainless................................................................20

Keeper, 3/16 stainless ...............................................................................8

Cable clips, 1/8”.........................................................................................6

Cable eye, 1/8”...........................................................................................2

Push tube 3/8 x 3" alum.............................................................................1

Allen wrench, 5/64”....................................................................................1

M2 ANTENNA SYSTEMS, INC.

4402 N. SELLAND AVE

FRESNO, CA 93722

559-432-8873 FAX 432-3059

www.m2inc.com Email: [email protected]

7-10-30LP8 UP-KIT PARTS & HARDWARE

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