M2 Antenna Systems EB-432/RK70CM 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 Incoporated 05/28/15
Rev.02
Model .........................................EB-432/RK70CM
Frequency Range.......................400 To 470 MHz
Gain, Overhead 90.....................5.5 dBic Typical
Impedance .................................50 OHMS
VSWR.........................................< 2.0:1
VSWR.........................................1.5:1 @ 420– 450 MHz
Pattern........................................Omni Directional
Polarity .......................................RH Circular Overhead
Polarity .......................................Horizontal @ Horizon
Power Handling..........................500W Max
Mounting.....................................1-1/2” to 2” Nom.
Connector...................................“N” Female
Size.............................................13.5” H x 9.5” W
Wind Survival / Wind Area..........100 MPH / .07 Sq. Ft.
Weight / Ship Wt.........................2 Lbs. / 3 Lbs.
M2 Antenna Systems, Inc.
Model No: EB-432/RK70CM
Eggbeater Satellite Antenna
FEATURES:
The EB-432 EGGBEATER offers exciting new performance characteristics for both fixed and mobile operations.
The EGGBEATER produces smooth Omni directional HORIZONTAL polarity at the horizon. Above the horizon, the pat-
tern transforms to RIGHT HAND CIRCULAR, making it a natural for OSCAR satellite use. By spacing the EGGBEATER
1/8 wave above a metal surface or the RK-70CM for base installations, the circular lobe increases by 6 dB, producing a
hemispherical pattern. No rotation or steering is required. For terrestrial mobile, base, net control, contest or field day op-
eration, increasing the distance above ground or over a metallic surface improves the horizontal radiation by up to 6 dB.
This produces instantaneous communications in all directions. Hams with little room or budget for larger antennas will
experience a new standard of performance with the EB-432/RK70CM.
SPECIFICATIONS:
Peak= 5.62 dBi Total Field
Circular Omni Antenna
ElevaƟon
Shown with RK-70CM
Reflector Kit

EB-432/RK70CM ASSEMBLY MANUAL
Caution: The copperweld steel loop elements are packed in a tightly
wrapped condition. Use extreme care while unpacking the loops. Work in a
clear area and be sure no one is standing near during unpacking.
Tool Required: 3/32” and 5/32 Allen wrench (provided) and 1/2 & 9/16 end wrench or socket.
1. To facilitate shipping, the loops are bent slightly in the middle. Straighten these, and any other bends, so
the elements form round circles. Locate the rod and thread the loop elements through the crossed holes in the
tip to their midpoints.
NOTE: be sure the loop elements are not shorted together at the crossover point; the pattern will be distorted.
2. Align the elements carefully with the terminals at the top of the balun case. Install the set-screws with the
3/32” Allen wrench, and insert the ends of the loop wires into the appropriate terminals. Insert wires until ends
butt against the Delrin collar at the base of the fiberglass rod. Tighten the 3/32” set-screws. This completes
assembly. A common mobile mounting 3/8-24 thread in bottom of balun case is used for mounting the EB-
432.
MOBILE INSTALLATION:
For best TERRESTRIAL results in a horizontally polarized mobile installation, the Eggbeater should be at
least two feet above the top of the vehicle, preferably higher. To prevent damage to the antenna or mount, a
heavy duty spring should be installed 4” to 26” below the threaded insert on the balun case. Another mast
section can be added below the spring if additional height is desired. To enhance the overhead circular
pattern for SATELLITE communications, mount the EB-432 loops at 1/8 wave (3.5”) above the roof, basically
at roof level or attached directly to a mag-mount.
FIXED LOCATION INSTALLATION:
For best TERRESTRIAL results, no reflector is
required. Mount the EB-432 as high as possible and
preferably on the top of a mast.
For mostly SATELLITE communications use, add the
RK-70cm Reflector as shown. Alternately, mount the
EB-432 directly on a metal plane of mesh or solid
metal 15” square or larger. Mounting this way will
reduce your terrestrial performance by about 6 dB but
improve your satellite signal by about the same
amount. The Eggbeater produces an omnidirectional,
horizontally polarized pattern, so no particular
orientation is necessary.
EB-432 WITH RK-70CM REFLECTOR

EB-432/RK70CM PART LAYOUT
GENERAL INFORMATION
Feedline should be good quality 50 ohm coax cable. Times LMR-400 and Belden 9913F are excellent low-loss foam
types and RG-8X is also good for short run as in a mobile setup. Connect the male "N" to the Balun case connector and,
if a mast is used, secure the cable to the mast with tape or nylon ties, beginning 4-6 inches below the connector and
repeating every 12” down the mast. Be sure to leave a little slack where the cable passes the spring.
For best performance, 80 watts, or more, are recommended particularly for mobile operation. Contacts with base
stations over 100 miles away are common and communications are possible for over 350 miles when the terrain
permits propagation. The Eggbeater will handle a Kilowatt in base station applications.
Any distortion or bends in the loops incurred during mobile use can and should be straightened out as soon as practical.
AS WITH ANY ANTENNA FED WITH RF ENERGY, AVOID CONTACT OR CLOSE PROXIMITY WHILE
TRANSMITTING.
SATELLITE APPLICATIONS:
1. The Eggbeater is very effective as a omnidirectional satellite antenna because it produces Right-Hand Circular
polarization off the top. When mounted 1/8 wave above an auto roof or M2’s RK-70CM Radial Reflector Kit for base
installations, the signal level off the top lobe increases by as much as 6 dB. No rotation or steering is necessary.
Circularity is optimized in the 420-450 MHz region but is still effective from 400 to 470 MHz.
2. Base station, contest and field day operations with the Eggbeater allows rapid fire communication with all horizontally
polarized stations, in all directions. Its also great for nets and emergency stations requiring instant communications in all
directions. The Eggbeater is not designed to replace a good directional antenna, but where space, time, or budget are
strong factors, it will prove a valuable addition to any station.
3. Experimenters: Try combining the Eggbeater with other vertical antennas. The fiberglass spacer mast is not required
for operation except to insulate the crossover points. It could be replaced with a metallic element to act as a vertical
radiator on 70 centimeters or any other frequency, or simply be used as a support for a vertical above the Eggbeater. It
may be possible to combine the Eggbeater with an HF mobile antenna so that optimum performance of both would be
preserved.
As you can see from the APPLICATIONS, the EGGBEATER is a versatile antenna.....let your imagination run free!
Write and tell us what you have done with your Eggbeater.
Note: #10 Copperweld (steel copper-clad wire) is used in the loops for maximum efficiency. The steel is exposed at
the ends and may show signs of rust in various environments. This effect is cosmetic only but can be reduced by
coating the ends of the wire with epoxy, RTV, Penetrox or equivalent after assembly.
M2ANTENNA SYSTEMS, INC.
4402 N. SELLAND AVE.
FRESNO, CA 93722
[phone] FAX: [phone]
www.m2inc.com Email: [email protected]

EB-432/RK70CM ASSEMBLY MANUAL
NOTE:
OTHER MOUNTING OPTIONS

EB-432/RK70CM PARTS & HARDWARE
DESCRIPTION.........................................................................................QTY
EB-432 BODY ASSEMBLY......................................................................1
LOOP ELEMENTS, #10 COPPERWELD, 29-1/8”....................................2
SET SCREW, 10-32 X 1/4”, SS................................................................4
3/32” ALLEN WRENCH............................................................................1
ASSEMBLY MANUAL ..............................................................................1
RK-70CM REFLECTOR KIT:
REFLECTOR PLATE, 1/2” X 2-1/2” (M23AEB0010)................................1
RADIAL RODS, 1/4” X 9” .........................................................................8
U-BOLT, 2”...............................................................................................2
U-BOLT, 1-1/2”.........................................................................................2
BOOM TO MAST L-PLATE, 4” X 4”, (M2APT0063).................................1
HARDWARE:
BOLT, 3/8-24 X 1”, SS..............................................................................1
LOCKWASHER, 3/8”, SS.........................................................................1
NUT, 5/16-18, SS.....................................................................................4
LOCKWASHER, 5/16”, SS.......................................................................4
SET SCREW, 8-32 X 1/4”, SS..................................................................8
5/64” ALLEN WRENCH............................................................................1
M2ANTENNA SYSTEMS, INC.
4402 N. SELLAND AVE.
FRESNO, CA 93722
[phone] FAX: [phone]
www.m2inc.com Email: [email protected]