M2 Antenna Systems 35.7-4 Assembly Manual

SPECIFICATIONS:

Model ......................................... 35.7-4

Frequency Range ....................... 35.4 to 36 MHz

Gain ............................................ 10.89 dBi

Front to back .............................. 22 dB Typical

Feed type ................................... "T" Match

Feed Impedance. ....................... 50 Ohms Unbalanced

Maximum VSWR ........................ 1.5:1 Typical

Input Connector .......................... "N' Connector

The 35.7-4 has been computer optimized from the ground up for gain and pattern covering 35.4-36 MHz. Originally

designed for Meteor Scatter and monitoring systems. The custom 1:1 Fairite balun and low loss hairpin match help

maintain high efficiency. Element ring clamps and other important components are CNC machined for maximum strength

and electrical integrity. All antenna hardware is stainless steel and the U-bolts for mounting are Zinc plated.

M2 antenna Systems, Inc., has well over 35 designs for Meteor Scatter applications covering from 39 MHz to 50 MHz. If

you have a specific requirement, please contact us for more details.

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

M2 Antenna Systems, Inc.

Model No: 35.7-4

*Subtract 2.14 from dBi for dBd / FS = Free Space

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

Power Handling ......................... 1.5 kW

Boom Length / Dia ..................... 20' / 2"

Element Length / Dia. ................ 188" / 7/8"-1/2"

Turning Radius: ......................... Call

Stacking Distance ...................... Call

Mast Size ................................... 2" to 3 " Nom.

Wind area / Survival .................. 3.8 Sq. Ft. / 100 MPH

Weight / Ship Wt. ....................... 40 Lbs. / 45 Lbs.

08/30/22

Rev.01

Table of Contents

Do you have a question about the 35.7-4 and is the answer not in the manual?

Page 1 All antenna hardware is stainless steel and the U-bolts for mounting are Zinc plated. M2 antenna Systems, Inc., has well over 35 designs for Meteor Scatter applications covering from 39 MHz to 50 MHz. If you have a specific requirement, please contact us for more details.
Page 2 35.7-4 ASSEMBLY MANUAL 1. Refer to the Dimension Sheet. Note the approximate position of each element. Slide the 2” RING CLAMPS into their approximate positions on the boom, element channels to top. If necessary, spread the ring clamp fingers with a flat blade screwdriver to ease movement on boom. Loosely add a 1/4-20 x 1” bolt and locknut to fingers of all clamps.
Page 3 35.7-4 DIMENSION SHEET...
Page 4 35.7-4 ASSEMBLY MANUAL 7. Now adjust the ELEMENT SPACING to match the Dimension Sheet. Since the Driven element is fixed, use it as the reference for setting the position of the Reflector, 52-1/2” to the rear. Then space all Director elements forward, using the Driven element as the reference.
Page 5 35.7-4 PARTS & HARDWARE DESCRIPTION BOOM SECTION, 2” x.125 x 240” STR ........... 1 ELEMENT SECTION, 3/4” X SEE DIMENSION SHEET ......8 ELEMENT SLEEVE, 7/8” X .058 X 30” (FOR 2” RING CLAMP) ....4 BOOM TO MAST PLATE, .250” X 4” X 6” ..........1 DRIVEN ELEMENT ASSEMBLY .............