M2 Antenna Systems 450-800-12 User manual

M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
Tel: [phone] Fax: [phone] Web: www.m2inc.com
©2015 M2 Antenna Systems Incorporated 12/15/15
Rev.01
Model .........................................450-800-12
Frequency Range.......................390 To 650 MHz
*Gain ..........................................12 To 13 dBi
Front to back ..............................20 dB Nominal
Beamwidth ...............................46° Nominal
Feed Impedance........................50 Ohms
Maximum VSWR........................1.5:1
Input Connector..........................“N” Female
Power Handling..........................1 kW
Polarity........................................RHCP or LHCP
Mounting.....................................Adjustable AZ-EL on 2”
Operating Temperature..............-50 F To 130 F
Wind area / Survival...................100 MPH
Weight / Ship Wt.........................35 Lbs.
M2 Antenna Systems, Inc.
Model No: 450-800-12 HELICAL ANTENNA
FEATURES:
The M2 450-800-12 Helix antenna offers performance characteristics for specialized fixed and rapid deploy oper-
ations within the 400 to 600 MHz band. It is perfect for either terrestrial or satellite applications. The antenna is supplied
with a manually adjustable Azimuth / Elevation mount and a counter weight. The antenna is shipped with the helix assem-
bled less ground plane. Finishes are optional. The steel adjustable mounting fixture and counterweight are zinc plated.
Optional arrays of 2 or more are available. Other frequency ranges and gains are also available down to 100 MHz. Com-
plete motorized, computer controlled AZ-EL systems are also manufactured by M2.
Where circular polarity is not required but high bandwidth is, M2 offers a line of various log periodic antennas from 5 to
1300 MHz. If it is antenna related, we probably have made it. Call us with your requirements.
SPECIFICATIONS:
*Subtract 2.14 from dBi for dBd

4402 N. Selland Ave, Fresno CA 93711 [phone] FAX [phone]
www.m2inc.com Email: [email protected]
450-800-12 HELICAL
ANTENNA
TOOLS REQUIRED: #2 Phillips head screwdriver, 11/32 nut
driver and 7/16” socket open end wrench.
1. Unpack the factory assembled HELICAL antenna, the CEN-
TER REFLECTOR PLATE, and the two (2) REFLECTOR
HALVES. Attach the Reflector halves to the Center Reflector
Plate using 8-32 x 1/2” screws and locknuts. Lightly lubricate
the rear end of the helix center tube and inside the collar. Then
slide the assembly up to the end of the helix element. Align the
holes of the helix assembly with that of the mounting plate collar
and secure with a 1/4-20 x 1-3/4” bolt and locknut. Slide the
‘N’-connector block assembly on the helix and rotate the con-
nector down through the large hole in the plate. Secure the
block to the plate with four (4) 8-32 x 1-1/2” screws
and locknuts Now install the 1/4-20 x 1/4” set screw
in the round end of the feed block assembly and
tighten, using the supplied 1/8” Allen wrench. Finally
mount the matching block and rotate it so it is paral-
lel to the helical tube. The final position can be ad-
justed for best match at a specific frequency if de-
sired..
2. Assemble the Elevation Bracket hardware as
shown on the assembly drawing. For the time being
set the elevation angle to 0 deg. (mast bracket per-
pendicular to the antenna). Attach the 1” saddle
adapter plate to the elevation bracket. Next, using
four 1/4-20 x 1-1/2” bolts and locknuts, attach the
four saddles loosely to the saddle adapter plate.
Now slide the entire assembly onto the back of the
boom, position right up against the mounting plate
collar, and set the feed connector to the desired
rotational orientation. Tighten the four saddle bolts.
3. With an associate, slide the antenna onto the
top of a 2” support pole. Point the antenna to the
proper azimuth and elevation angles, and tighten all
of 1/4-20 hardware on the mast clamp bracket.
This completes the assembly.
450-800-12 HELICAL ANTENNA
PARTS LIST
DESCRIPTION QTY
HELIX AND MAIN BOOM ............................. 1
CENTER MOUNTING PLATE, WELDED ..... 1
REFLECTOR PLATE.................................... 2
FEED BLOCK W/ “N” CONN......................... 1
MATCHING POST, 1/4X3/4X1-1/2” .............. 1
SADDLE ADAPTER PLATE.......................... 1
SADDLES, 1-1/2”.......................................... 4
ELEVATION BRACKET................................ 1
MAST BRACKET (2 halves).......................... 1
REAR BOOM STUB, 1-1/2 X 18” ALUM....... 1
COUNTER BALANCE 4” DIA........................ 1
ASSEMBLY MANUAL................................... 1
HARDWARE BAG
DESCRIPTION QTY
BOLT, 1/4-20 x 3/4” SS..................................7
BOLT, 1/4-20 x 1-1/2” SS...............................4
BOLT, 1/4-20 x 1-3/4” SS...............................1
BOLT, 1/4-20 x 2” SS.....................................1
BOLT, 1/4-20 X 2-1/2”,SS..............................4
BOLT, 1/4-20 X 4-1/2”.SS..............................1
SET SCREW, 1/4-20 x 1/4” SS......................1
FLATWASHER, 1/4”, SS................................4
LOCKNUT, 1/4-20, SS...................................7
SCREW, 8-32 X 1-1/2”, SS ...........................4
SCREW, 8-32 X 3/4”, SS...............................12
SCREW, 8-32 X 3/8”, SS...............................1
LOCKNUT, 8-32 SS.......................................16
LOCKWASHER, #8 SPLIT RING , SS...........1
1/8 ALLEN WRENCH ....................................1
450-800-12 HELICAL ASSEMBLY MANUAL

PHOTOS OF RANGE TEST SETUP AND CLOSE UPS OF THE FEED
SYSTEM AND THE MANUAL TILT MECHANISM.
450-800-12 HELICAL ASSEMBLY MANUAL