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Now it is time to route the element wires around the antenna.  Start with the 10 meter
wire on the inner most loop.  The 10 meter wire will be the shortest one.  Attach the end
with the eyelet to one side of the balun box.  Route the wire around the antenna to each
of the inner most holes in the support arms.  Insert a 1 inch screw with a flat washer on it
through the fiberglass tube.  Thread the nut onto the screw but do not tighten.  Do this on at
each hole as you add the wire.  Do both sides and then attach the insulator.  See figure below
as to how to wrap the wire around the bolt on the insulator.  Do this for both sides and try to
make sure the insulator is centered.  The same amount of wire should loop around each bolt.
Pull the wire so that there is just a small about of slack in the wire.  Do not tighten the wire to 
remove sag.  A little sag will not hurt the performance of the antenna and it will prevent stress 
to the element wire and support arms when icing or strong wind occurs.  
Leave the screws with the washers on them loose to allow movement of the wire when installing
the rest of the loops.   Route the other loops the same way.  Mind the tension of the wires on 
each element and try to keep them even. The insulators will naturally sag more than the other 
sections because of the added weight.  This will not cause any problems with the operation of 
the antenna.  When your happy with how all the wires look, tighten the screws on the element 
tubes to prevent the wires from moving.  Tighten the lock nuts on the matching box and 
compress the eyelets down for a good  connection.

Element Wires

Loop extra wire back around
Don't trim it yet.
Wait for tuning

Your insulator may differ

Install nuts just enough that 
the nylon lock engages. 

Содержание MFJ-1835H

Страница 1: ...ons Before Operating Equipment 300 Industrial Park Road Starkville MS 39759 USA Tel 662 323 5869 Fax 662 323 6551 COPYRIGHT 2015 MFJ Enterprises Inc C MFJ 1835H 10 12 15 17 20 METER INSTRUCTION MANUAL...

Страница 2: ...y but take your time anyway As with all antennas safety glasses are recommended during the assembly and tuning We don t want you to Poke your eye out Pick a clear open spot and assemble the antenna aw...

Страница 3: ...In the box 2 mounting plates 1 mounting bracket 4 element arms 1 feed arm 5 insulators 1 matching box Parts pack 2 rolls of element wire for each band Lots of Nuts and Bolts 10 12 15 17 20...

Страница 4: ...e sure the nuts are on the bracket side 4 places mounting bracket holes Select one of the four element arms Install the arm between the two plates using four 6 32 x 1 inch screws and nuts Snug the nut...

Страница 5: ...e using the last two holes in the plate It does not matter which end you use The hole patterns are the same These holes are under the mounting bracket but it is not shown in this diagram Feed arm moun...

Страница 6: ...ng plates Wind 12 turns of coax with a six inch diameter or install equivilant balun Mounting plate Mounting plate Now would be a good time to mount the antenna on a temporary mast if you haven t alre...

Страница 7: ...t of slack in the wire Do not tighten the wire to remove sag A little sag will not hurt the performance of the antenna and it will prevent stress to the element wire and support arms when icing or str...

Страница 8: ...t frequency This location will be the highest frequency This location will be between the two EXAMPLE Remember that It is not necessary to add the strips if the antenna is already at the frequency you...

Страница 9: ...will cut down on the weight of the insulators Note that there are extreme high voltages present at the tips of the wires and arcing may occur while transmitting if the wire is frayed S Loop around th...

Страница 10: ...In addition the coaxial cable feeding the antenna should have the shield grounded to eliminate the risk of any indoor equipment failure from allowing hazardous voltages from appearing indoors and crea...

Страница 11: ...meter wire assembly 12 meter wire assembly 15 meter wire assembly 1 1 2 2 2 17 meter wire assembly 13 1835 20 20 meter wire assembly 2 2 Parts Pack 17 1835 1 13 1835 17 656 0375S 705 0632 NL 561166 6...

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