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MFJ-1866 

Skyband Discone Antenna 

Instruction Manual 

 

Thank you for purchasing the MFJ-1866, Skyband Discone Antenna.  Please read this 

instruction manual completely and thoroughly before using the MFJ-1866. 
 

Specifications: 

• 

Frequency:  Receive: 25-1300 MHz

 

    Transmit: 144-220-440-900-1290 MHz

 

• 

Maximum Power: 200 W

 

• 

SWR: 1.5

 

• 

Connector: SO-239

 

• 

Mast diameter: 1.37 inch (35 mm)

 

 

Installation Instructions: 

• 

The MFJ-1866 is designed to be mounted on any 1.37-inch (35mm) pipe. 

• 

Feed your coax through the pipe. 

• 

Tightly screw your coax onto the SO-239 connector of the MFJ-1866. 

• 

Insert the pipe you selected into the base of the MFJ-1687 and tighten the setscrews, so that the 
base is securely attached to the pipe. 

• 

Screw in all 8 of the 11-inch radials horizontally around the top of the base as shown.  Use a 
wrench to tighten the radials. 

• 

Screw in all 8 of the 32.5-inch radials in the lower row of holes at an angle as shown.  Use a 
wrench to tighten the radials. 

 

Notes: 

• 

If you install the radials before securing the base onto the pipe, you may have trouble tightening the 
setscrews on the base. 

 
 

Warning: 

• 

Always place the antenna in a location away from people.  Serious RF burns may occur if a person 

comes in contact with the antenna.

NEVER INSTALL AN ANTENNA IN A LOCATION WHERE CONTACT 

WITH POWER LINES IS POSSIBLE.  DEATH OR SERIOUS INJURY MAY 

OCCUR.

 

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