M2 2M HO LOOP Manual

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SPECIFICATIONS:

Model ......................................... 2M HO LOOP

Frequency Range ....................... 144 To 144.5 MHz

Gain, Typical @ 10 ft. ................. 4 dBd @ 10 deg.

Gain, 2 STK @ 82" & 132" ......... 8 dBd @ 9 deg.

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

Impedance ................................. 50 ohms, unbalanced

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

FEATURES:

For quick and easy communications up to 200 miles or more, the new 2M HO LOOP provides an omnidirectional, HORIZON-

TALLY polarized signal ideal for mobile and base operations on sideband and CW. Horizontal polarity permits a single HO loop to pick

up 4+dB of ground gain that verticals can't. As with most horizontally polarized antennas, performance improves dramatically with

height above ground. By stacking two HO LOOPS, another big gain jump occurs. HO LOOPS do not need a counterpoise, so mounting

options are simplified. Mounting 18" high, in the middle of a vehicle roof produces 2 dBd gain in a ball pattern upward for LEO satellite

and modest terrestrial operation.

Physically, the 2M HO LOOP is a 11.25" square loop, fabricated from two 3/8" dia. aluminum tubes to minimize 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 coax feedline. Mounting is via a single 3/8" hole (standard mobile mounting hardware size).

For more performance, try the HO LOOP-STACK KIT: INCLUDES: phasing lines, "T" junction block, upper and lower 1/2 " and 5/8"

mast sections. For easy base-station installation use the optional wall / mast mounting bracket and U-bolts. For a powerful mobile sig-

nal, stack and 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.

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

M2 Antenna Systems, Inc.

Model No: 2M HO LOOP

*Subtract 2.14 from dBi for dBd

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

Feed Connector......................SO– 239

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

Vehicle Mounting height............18" or more

Stacking Separation ................... 36" to 50"

Wind Area ................................... 0.025 sq. ft.

Weight...................................14 oz.

7/16/18

REV A

Page 1: Specifications
Physically, the 2M HO LOOP is a 11.25” square loop, fabricated from two 3/8” dia. aluminum tubes to minimize 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 coax feedline.
Page 2 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.
Page 3 2M HO LOOP ASSEMBLY MANUAL...
Page 4 2M HO LOOP STACK KIT Mount both antennas with no phasing cables installed. Make sure the feed connectors are facing each other and the larg- er feed blocks are on the opposite side on each anten- na. (2M and 222 only). Creating a 180°phase shift.
Page 5 MOUNTING & OPTIONAL KITS UNIVERSAL MAST BRACKET KIT (PT# FGMASTBRKTKIT) SIDE MOUNT TOPMOUNT BIG FOOT MAG HO LOOP MAG MOUNT (PT# FGBIGFOOT) (PT# FGHOMAGKIT)
Page 6 2M HO LOOP PARTS & HARDWARE HO LOOP, STANDARD PARTS LIST DESCRIPTION H.O. LOOP HALF H.O. FEED ASSEMBLY WITH SO-239 CONN H.O. SHORTING BAR SET SCREW, 1/4-20 X 1/4 S.S. ALLEN WRENCH, 1/8 BOLT, 3/8-24 X 1” SS FLAT WASHER, 3/8 SS...