M2 Antenna Systems 222 HO LOOP Bedienungsanleitung

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

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

Rev.01

Model .........................................222M HO LOOP

Frequency Range.......................220 To 224 MHz

Gain, Typical @ 84” ...................4.75 dBd @ 7 deg.

Gain, 2 Stack @ 84” & 117”.......8.2 dBd 7 deg.

Polarity .....................................Horizontal Omni

Impedance .................................50 Ohms, Unbalanced

Power Handling..........................800W, 1.5kW for Stack

Feed Connector..........................SO-239

Mounting.....................................3/8-24

Vehicle Mounting Height ............18” or more

Stacking Separation...................33” to 36”

Wind Area...................................0.02 sq ft.

Weight ........................................12 oz.

M2 Antenna Systems, Inc.

Model No: 222 HO LOOP

FEATURES:

The new 222 MHz HO loop provides easy SSB and CW communications out to 200 miles or more. HO LOOPs pro-

duces an omnidirectional, HORIZONTALLY polarized signal ideal for mobile and base operations. Horizontal polarity per-

mits the HO loop to pick up 5+dB of ground gain that verticals can't. As with most horizontally polarized antennas, perfor-

mance improves dramatically with height above ground. By stacking two HO LOOPS, another big gain jump occurs (see

pattern and note great reduction of high angle lobes). HO LOOPs do not need a counterpoise, so mounting options are

simplified. Physically, the 222 HO loop is a 7.75” square, size loop, fabricated from two 3/8” dia. aluminum tubes to mini-

mize losses. The sealed feed block provides weather protection with minimum wind drag. The heart of this unique design

is the shorted stub matching to a 50 ohm coaxial feedline. Mounting is via a single 3/8" hole that is standard for most mo-

bile hardware. For enhanced performance, try the HO LOOP-STACK PACKAGE: 2 HO LOOPS, phasing lines, “T” junc-

tion block, upper and lower 1/2 “ and 5/8” mast sections. For easy base-station installation use the optinal wall / mast

mounting bracket and U-bolts. For a powerful mobile signal, stack an array of HO loops on our optional “BIG FOOT”, mag

-mount (shown above). Use, the optional 5” magnet and 18" mast for single band mobile operation.

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

1.Insert the 1/4-20 x 1/4" set screws a few threads into the two connector blocks. Use the 1/8" Allen

wrench provided. Insert the 1/4-20 x 1/4" set screws a few threads into the ends of the shorting bar.

2. Refer to the HO-LOOP ASSEMBLY SHEETand insert thetubes into the two connector blocks

as shown. Slide on the shorting bar, align the loops and GENTLY tighten the 1/4-20 x 1/4" set screw on-

to the tubes. Be sure the blocks are set to the starting ’A’ dimension. The ‘A’ dimensions controls the

FREQUENCY.

3. Set the shorting bar to the ‘B’ dimension shown and tighten gently. When complete check match and

tighten . The ‘B’ dimension controls the MATCH

4. Once the loop is assembled either final tune it in its final position on your vehicle or if tower mounted,

simulate the mast size and other conditions to minimize final tuning in position.

4. That is about it. A 3/8-24 x 1" bolt and washer is provided to attach the HO LOOP to any standard

mobile mast or any M2 mast available as an option.

REMEMBER, HORIZONTALLY POLARIZED ANTENNAS ARE AFFECTED BY THE GROUND SO

THE HIGHER YOU AND GET YOUR HOOP LOOP THE BETTER. The ground can be your friend

as well providing as much as 6 dB additional ground gain at some angle above the horizon. That angle

is defined by the frequency and height above ground. At one wavelength, 80" at two meters, the typical

angle of maximum radiation will be about 14 degrees. At two wavelengths, the angle is 7 degrees and

at 4 wavelengths ( 27 ft.), the angle is 3.5 degrees. Net gain improves with height because the pattern

hits the ground at a more grazing angle giving up less energy to the ground.

In most mobile installations 10 to 11 feet is about the practical limit for most driving conditions. The HO

LOOP works at just 18" above a vehicle roof and contacts out 200 miles are quite common. However

you will find more people to talk to and longer if you can get the HO LOOP up at the 10 foot level.

POWER CONSIDERATIONS : 10 Watts into the HO LOOP will do well out to about 80 miles. 150

Watts gets you into that 200 mile category and 350 to 400 Watts get to the 300-400 and you will enjoy

much longer QSO's on a regular basis. From a hill top location 600-800 mile QSO's have been reported

several times. We hope you enjoy your new HO LOOP and please keep an ear out for those rare but

wonderful skip openings to other parts of the country!

Contact M2 for optional items available for your HO LOOP!

M2ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: [email protected]

222 HO LOOP ASSEMBLY MANUAL

HO LOOP, STANDARD PARTS LIST

DESCRIPTION QTY

H.O. Loop Half 2

H.O. Feed Assembly with SO-239 Conn1

H.O. Shorting Bar 1

Set Screw, 1/4-20 x 1/4 S.S. 6

Allen Wrench, 1/8 1

Bolt, 3/8-24 x 1” SS 1

Flatwasher, 3/8 SS 1

Assembly Manual 1

HO LOOP ADD ON MAG-MOUNT KIT

DESCRIPTION QTY

5” Magnet 1

Mylar Cover 1

Mast, 5/8 x 18” 1

Bolt, 3/8-24 x 1/2 S.S. 1

Flatwasher, 3/8 S.S. 2

Cable Ties 2

HO LOOP-STACK KIT ADD ON LIST

DESCRIPTION QTY

Coaxial Cable RG-59 x 33” @ 3/4 w/l 2

Loop mast, 5/8 x 18" 1

Loop mast 1/2 x 32" 1

Assembly Manual 1

HARDWARE BAG

Junction Block 1

Stud, 3/8 x 24 x 1-1/2" 1

3/8 flatwasher 4

Nut Seal 2

Cable ties 4

222 HO LOOP PARTS & HARDWARE

M2ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: [email protected]

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