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Initial Tune Up 

For the initial tune up a SWR analyzer is nice to have if you have access to one. If not, 
make all your adjustments with low power. Now, lower your antenna until it reaches the 
end  stop  and  go  to  6  meters  and  check  your  SWR,  you  might  have  to  raise  the 

antenna  a  small  amount to come into 6 meters, next go to 10 meters and check your 
SWR, it should be low. Next, you can go to 15 meters and raise the antenna until you 

get a SWR dip there. Then 20, then so on. 

Keep in mind that 6-20 meters are close together. If the SWR doesn't go below 1.5 on 

these bands the ground is most likely the problem, remember the ground needs to right 
at the base of the antenna. 

Now you need to go to the middle of 20 meters and check your SWR. Record that and 

then go to 40 meters and do the same. Your standing wave should be below 1.5 on both 
bands.  If  it  is  below  1.5  on  both  bands  no  adjusting  is  needed  on  the  matching  coil. 
However,  if  the  SWR  is  above  1.5  on  20  meters  and  low  on  40  meters  this  means 
there is too much inductance from the matching coil. This can easily be corrected by 

simply spreading the matching coil until a low SWR is attained on 20 and 40 meters. If 
you  have  spread  the  coil  approximately  1  1/2  inches  wide  and  the  SWR  has  not 

dropped on 20 meters you might need to remove a turn or two from the coil. However, 
keep in mind if you had to go to this extreme to tune, your ground path is most likely 

too far away or you have other antennas too close to this antenna. 

If properly installed this antenna will have a standing wave below 1.5 from 7 to 54 MHz. 

We know that every antenna installation is unique and it is impossible to describe all 
the scenarios in this manual. However, if you are having problems with this initial tuning 

please call.

  

WARNING:

 

When  using  the  SDC-102  controller  make  sure  to  reduce  the  stall 

current  value  in  the  controller  to  between  (020  to  030).  Not  changing  the  factory 

default  current  from  (075)  to  (020  to  030)  when  using  auto  park  the  antenna  or 
holding  the  up  or  down  more  than  10  seconds  with  the  antenna  all  the  way  up  or 

down could burn up the motor in the Little Tarheel HP. 

Operation 

Remember that when the coil is all the way in its resonant on the high bands and all 
the way out on the low bands. It will take a little time to get use to this style of antenna, 
some  mark  the  antenna  with  tape  to  mark  the  approximate  location  of  the  bands, 

some  just  listen  to  the  noise  level  increase  on  the  radio's  receive  when  it's  close  to 
resonant. When you fine tune you need to transmit a low carrier (AM, FM, CW) at 5 to 

10 watts and watch the SWR meter till the dip. 

Running an Amplifier 

This antenna is designed to handle up to 500 watts P.E.P.

 

SSB Only

.  

Carrier modes (AM,CW, FM and RTTY) are limited to 125 Watts PEP Maximum. 

  

Do not exceed these ratings. Always do the initial tuning with low power, and then 
apply the amplifier if needed. 

Summary of Contents for Little Tarheel HP

Page 1: ...el HP 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 UNITED STATES OF AMERICA PROUDLY MADE IN THE ...

Page 2: ...32 whip supplied with the antenna 5 3 MHz to 38 MHz with a 56 whip 3 4 MHz to 18 MHz with a 12 portable whip Before proceeding with the installation make sure you have received everything You should have the following 1 Little Tarheel HP Antenna 1 32 Whip 1 3 8 x 24 TPI Stud 1 Matching Coil 1 20 ft Control Cable 1 Ferrite Core 1 Manual Control Switch ...

Page 3: ...ol wire from the antenna without this core the antenna will be untunable The next thing is the tuning coil Photo 4 This coil must go from the antenna base to the immediate ground Included are miscellaneous connectors for different mounting options You will need to scrap away the enamel for the connectors then crimp and solder for best results On a loaded mobile antenna you ll need this so the ante...

Page 4: ... mind if you had to go to this extreme to tune your ground path is most likely too far away or you have other antennas too close to this antenna If properly installed this antenna will have a standing wave below 1 5 from 7 to 54 MHz We know that every antenna installation is unique and it is impossible to describe all the scenarios in this manual However if you are having problems with this initia...

Page 5: ...ill show you relative tuning positions of the Little Tarheel Antenna Little Tarheel in 6 meter position Little Tarheel in 10 meter position with 32 whip Little Tarheel in 20 meter position with 32 whip Little Tarheel in 40 meter position with 32 whip ...

Page 6: ...ed The coil and contact assembly fingerstock have a lifetime warranty to the original owner Your antenna needs to be sent in to the manufacturer for any warranty repairs 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 has a ONE YEAR NO MATTER WHAT WARRANTY to the original owner If for any...

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