M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com
©2018 M2 Antenna Systems Incorporated
7/16/18
REV A
M2 Antenna Systems, Inc.
Model No: 2M HO LOOP
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
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.
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.
SPECIFICATIONS:
*Subtract 2.14 from dBi for dBd
Summary of Contents for 2M HO LOOP
Page 3: ...2M HO LOOP ASSEMBLY MANUAL...
