Fortress Technologies Fortress Micro Dépliant

micro series receiver comes equipped with eight channels.  When hooking up power 
to your receiver, you may either connect a nicad battery pack to any unused channel 
input or purchase one FMA Direct Y-Connector block (PN:  209) available through 
your local hobby dealer.  The Y-Connector block connects battery power and one 
servo to one channel of the Fortress micro. 

• 

RANGE TEST 
To assure proper performance, the Fortress micro series receiver must be range tested with 
the "host" transmitter.  The major reason for this important test is that over time, all R/C 
transmitters are susceptible to de-tuning and frequency “drift”.  To ensure the utmost in 
secure RF reception, current technologies for narrow-banding used in FMA designs can 
actually place a higher demand on transmitters.  Power level and frequency accuracy of your 
transmitter are more important than ever before.  Therefore, for the initial range check and in 
rare cases when you suspect degradation of performance from your R/C system, FMA would 
like to suggest the following guidelines:  Begin by placing the receiver on a cardboard box or 
another non-metallic surface to elevate it about 2 feet off the ground.  Connect only one servo 
and the battery direct.  Do not install a switch harness for the initial range test because switch 
harnesses are often the cause of poor range.  Perform the range test with the receiver 
antenna fully extended VERTICALLY into the air on a dowel rod or the like, and the 
transmitter antenna collapsed.  Apply power and walk away from the receiver moving one 
stick on the transmitter.  You should obtain at least 200 feet of line-of-sight ground range if 
everything is operating properly.  If any loss of servo control occurs, the system must be 
calibrated by an FMA service station.  CALL (301) 831-8980 for FMA Direct technical 
assistance.  In certain cases, the FMA service station may ask you to send in your transmitter 
along with your receiver. 

 
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ACCESSORIES: 
Aileron extension cables, Y-harness, switch harness, and numerous other accessories as 
well as a full line of servos, batteries, and chargers are available for use with your FMA 
receiver either direct or from your local FMA dealer. 

 
 
 
FMA LIMITED WARRANTY ON RADIO RECEIVER PRODUCTS 

 
THE WARRANTY 
FMA, Inc. warrants this receiver to be free of manufacturing defects for the term of one year from the 
date of purchase.  Should any defects covered by this warranty occur, the receiver shall be repaired 
or replaced with a unit of equal performance by FMA, Inc., or an authorized FMA service station. 
 
LIMITS AND EXCLUSIONS 
This warranty may be enforced only by the original purchaser, who uses this receiver in its original 
condition as purchased, in strict accordance with the Fortress micro series owner's manual.  
Receivers returned for warranty service to an FMA service center will be accepted for service when 
shipped post-paid, with a copy of the original sales slip or warranty registration form, to the service 
station advised by FMA, Inc. 
 
THIS WARRANTY DOES NOT APPLY TO 
1. 

Consequential or incidental losses resulting from the use of this receiver. 

2. 

Damage resulting from accident, crashes, misuse, abuse, neglect, electrical surges, reversed 
polarity on connectors, lightning or other acts of God. 

3. 

Damage from failure to follow instructions supplied with the product. 

4. 

Damage occurring during shipment of the product either to the customer or from the customer 
for service (claims must be presented to the carrier). 

5. 

Damage resulting from repair, adjustment, or any alteration to product by any one other than 
an authorized FMA technician. 

6. 

Installation or removal charges, or damage caused by improper installation or removal. 

 
CALL (301668-7614 FOR MORE INFORMATION ABOUT SERVICE AND WARRANTY REPAIRS.  
 

 

 

 

 
 

 

 

 

series receivers are designed to be the smallest, lightest, dual conversion R/C receivers 
available.  You may fly your Fortress micro in anything from indoor R/C to IMAA legal quarter 
scale aircraft with complete confidence.  Offered in either AM or FM versions, these high-
performance designs incorporate the latest advancements in RF technologies available to the 
R/C industry.  Superior RF mixer technology and advanced circuitry for detecting and 
amplifying PPM information enables the Fortress micro series to out-perform other single and 
dual conversion designs presently offered.  Heavy-duty, SMT construction on a single, glass-
epoxy P.C. board provides outstanding reliability.  New, universal operation makes user-
programmable shift switching a snap in the FM version.  This means that the same FM 
receiver can now be programmed to operate with any FM transmitter regardless of the 
direction of the FM shift. 
 
SPECIFICATIONS: 
SIZE:   

FORTRESS 

MICRO 

FMA, Inc. 
5716A Industry Lane 
Frederick, MD 21704 
Sales: (800) 343-2934 -Technical: (301) 668-7614