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Picture 1 

– MT-1 & MT-30FB 

Installation 

Before  installation  of  this  antenna  there  are  a  few 

things  you  have  to  consider.  To  get  peak  performance  you 
need to try to mount the antenna in a location where the 

decoupler (this is where the coil comes out of the antenna) 
is at least as high as the highest part of the vehicle. Next, 

and this is the most important is  the vehicle ground must 
be  within  12  inches  of  the  base  of  the  antenna.  This 

ground path should be  provided with ground strap at least 
1/2 inch wide. 

After  installation  if  the  SWR  will  not  go  below  1.5  on  the 
frequencies  above  10  MHz  it's  because  of  the  ground  path 

mentioned  above.  Again,  ground  close  to  the  base  is  most 
important with this and any other antenna. 

This is a large antenna that will require heavy duty mounts 
to  withstand  the  pressure  produced  from  the  wind  load.  All 
of Tarheel Antenna mounts are designed to take this load. 

While  we  have  a  variety  of  mounts  lay  the  antenna  down 
horizontally,  it’s  designed  to  be  mounted  vertically.  While 

using these mounts, just make sure the anti-rotation rib on 
the  antenna  will  be  at  the  bottom  while  in  the  horizontal 

position. 

 

 

 

 

Picture 2 

– MT-1 & MT-5 

Picture 3 

– MT-1 & MT-3FB 

Picture 4 

– MT-1 & Automatic Lift & Lay 

Picture 5 

– MT-1 & MT-3 

Summary of Contents for 400A

Page 1: ...nnas Inc Instruction Manual for the Model 400A Continuous Coverage HF Antenna 18511 CR 304 St Joseph MO 64505 816 671 9409 816 364 2619 Fax E mail sales tarheelantennas com Technical Support 919 552 8788 E mail tarheelantennas aol com www tarheelantennas com ...

Page 2: ...ng List for Model 400A Package All of the above plus the following MT 1 Antenna Bracket Quick Disconnect for the Whip 21 ft of RG 8X Coax with connectors installed 1 pack of Coax Seal Model 400A Antenna Specifications Lower Mast Length 4ft Frequency Coverage with 6 whip 1 7 to 26 MHz Power Rating 250 watts P E P Typical SWR 1 5 to 1 or less Total Height with 6 whip at 25 MHz 10 4 Total Height with...

Page 3: ...allation if the SWR will not go below 1 5 on the frequencies above 10 MHz it s because of the ground path mentioned above Again ground close to the base is most important with this and any other antenna This is a large antenna that will require heavy duty mounts to withstand the pressure produced from the wind load All of Tarheel Antenna mounts are designed to take this load While we have a variet...

Page 4: ...install the upper half of the quick disconnect in the bottom of the antenna tight Picture 7 Be sure to use the lock washer The MT 1 antennas bracket has 6 cutouts for the anti rotation rib that s on the antenna Be sure the rib goes into one of these cutouts there is no need to cut the insulator it will compress enough to tighten the antenna down Picture 8 Don t forget to tighten down the top half ...

Page 5: ... a standard 12vdc system Keep in mind polarity of these two wires are not important With the switch mounted up wire to bottom you can wire the red wire with black stripes to positive side of your 12vdc system and the white wire with red stripes to the negative side This will allow the antenna to go up while you press the up button this is the way most wire up to their systems Up on the switch mean...

Page 6: ... in a location away from exhaust pipes and anywhere the cable can be damaged Next is the control box and control cable We preassemble everything here so you ll have a plug and play system If properly installed this antenna will have a standing wave below 1 5 from 1 8 to 30 MHz We know that every antenna installation is unique and it is impossible to describe all the scenarios in this manual Howeve...

Page 7: ...tuning positions of the Model 400 Tarheel Antennas LEXAN COVER REMOVED FOR CLARITY Model 400 full down position with 5 ft whip 28 0 MHz Model 400 21 2 MHz with 5 ft whip Do not try to twist or turn the bug shield on the outside of the antenna this is designed not to turn ...

Page 8: ... MHz with 5 ft whip and 1 1 2 of coil showing Model 400 3 9 MHz with 5 ft whip and 4 of coil showing Model 400 3 5 MHz with 5 ft whip with 5 of coil showing Model 400 1 9 MHz with 5 ft whip and 15 of coil showing Model 400 1 8 MHz with 5 ft whip and 16 1 2 of coil showing ...

Page 9: ...s it 7 Reassemble the Antenna After you have the antenna reassembled now is the time for a good cleaning on the outside Use the alcohol to remove the grime off the tube and Lexan next get a good coat or two of wax on it Warranty Guarantee IF for the 1st 30 days if for any reason you are not completely satisfied return the antenna undamaged for a full refund less the shipping charges The antenna ha...

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