M2 Antenna Systems 432-12EME, Instructions

6.  Mount the DRIVEN ELEMENT BLOCK to the boom using a single 8-32 X 1-1/4" screw and 

lockwasher. Orient the block with feed connector facing to center and balun connectors facing to 
rear. Block orientation may be reversed if you wish feedline to exit from rear of boom. 

 
7.  Before installing the balun, thread a 3/8” SEAL NUT all the way onto each connector, with the 

black Neoprene face of the nuts facing out. Attach balun and tighten the connectors 

gently

 using a 

7/16" end wrench. Once the connectors are tight, back the Seal Nuts out and finger-tighten firmly 
up against the face of the connectors (or tighten 

gently 

with 1/2” end wrench). A lot of torque is 

unnecessary. Form the balun close to the boom and secure to boom with a nylon cable tie. Tie 
should be snug but not crushing or kinking the coax.  

 
8.  Install the 8-32 x 1/4” set screws (internal Allen head - tool supplied) into the SHORTING BARS. 

Slide the bars onto the 3/16” rod driven element tips and 1/8” Driven Element Block Rods. Position 
the Shorting Bars as specified on the Dimension Sheet: the distance given is between the outer 
edge of the Driven Element Block and the inner edge of the Shorting Bar. Align the bars and rods 
with each other and tighten the setscrews. 

 
9.  The boom to mast plate is mounted at the rear stub of the boom. 1" U-bolts and the stainless nuts 

and lock washers provided. DO NOT OVER TIGHTEN. 2” U-bolts are provided for mounting the 
antenna to your mast or ‘H’ frame. The feed line routes back and onto the mast.   

 
10.

 MOUNTING AND STACKING INFORMATION 

Keeping metallic masts, crossbooms and the feed coax out of the element plane will help maintain 
good VSWR and pattern. Since this is a rear mount antenna the rear structure material is not an 
issue regardless of chosen polarity.  If you choose to tie multiple antennas together near the 
middle or front of the boom, any metallic structure or feed line must be perpendicular to the plane 
of the elements. 

 Stacking? 

Call 

M

2 

and let us help you DO IT RIGHT 

T

HIS COMPLETES THE ANTENNA ASSEMBLY. 

CAREFULLY MANUFACTURED BY: 

M

2

 ANTENNA SYSTEMS, INC. 

4402 N. SELLAND AVE. 

FRESNO, CA 93711 

(559) 432-8873 FAX (559) 432-3059  

WEB SITE: www.m2inc.com  Email: sales@m2inc.com 

432-12EME ASSEMBLY MANUAL