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[  ] In similar fashion, install the other 10-meter wire, connecting the ring lug to 
the match box and routing the wire around to the opposite side of the frame.  
 
[  ] At the far end, connect the second wire to the opposite end of the insulator 
using the end-hole. Don’t be concerned if the element wire sags. You'll adjust it 
later after all of the wires are installed.  
 
[  ] Install the 12-meter loop using the same procedure outlined above.  
[  ] Install the 15-meter loop.  
[  ] Install the 17-meter loop. 
[  ] Install the 20-meter loop.  
 
[  ] With all five element wires installed, reduce wire sag by relocating the rig lugs 
(as needed) to other mounting holes in the insulators. Do not tension the wires so 
tightly that they distort the spreaders or pull the frame out of square. The 
objective is to equalize tension and minimize (but not eliminate) sag. Sight down 
each support tube to ensure it is straight and 90-degree from the adjacent tubes.  
  

                

Good

Not Good

Sight down the length of the frame 

to confirm that each leg is straight

 

 
[  ] Once satisfied with wire tensioning, tighten all spreader screws to secure 
each wire in place. Also, tighten the element nuts on the matchbox, fanning out 
the ring lugs as needed to ensure flat metal-to-metal contact between each 
eyelet. Check all other hardware to confirm everything is secure. 
 

                                            

Fan leads so lugs make

full surface-to-surface

contact

 

 
 

Summary of Contents for MFJ-1835

Page 1: ...12 15 17 20 Meter Cobweb Antenna Instruction Manual Caution Read All Instructions Before Assembling and Using This Product MFJ 300 Industrial Park Road Starkville MS 39759 USA Tel 662 323 5869 Fax 66...

Page 2: ...35 4 72 Fiberglass Element Support Tube 811 1835 1 1 43 Fiberglass Feed Tube 811 1835 2 1 50 Ohm to 12 5 Ohm Match Box 10 1835 1 1 Mast Mounting Bracket 735 1835 5 Element End insulators 12 x 5 737 01...

Page 3: ...d during final assembly and installation Mounting Bracket Holes Mounting Plate Locate the second mounting plate and position it so all mounting holes align with the first plate Install one of the fibe...

Page 4: ...rt tube The two remaining tie wraps may be used later to secure your coax to the feed tube Install flat washers on four 4 1 inch screws and insert them at the four 10 meter spreader locations holes ne...

Page 5: ...ng the rig lugs as needed to other mounting holes in the insulators Do not tension the wires so tightly that they distort the spreaders or pull the frame out of square The objective is to equalize ten...

Page 6: ...clear of the insulator and add a short length of wire using a 6 32 screw Bandwidth The 2 1 bandwidth for a half wave loop is normally much narrower than it is for a straight line half wave dipole so...

Page 7: ...tallation using one or more runs of 10 solid aluminum ground wire Also always install a barrel connector or junction box where the cable enters your building and unhook it at the first sign of threate...

Page 8: ...ners who attempt to repair defective units Technical consultation is available by calling 662 323 5869 5 This warranty does not apply to kits sold by or manufactured by MFJ Enterprises Inc once assemb...

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