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Now You Need To Install The Top Whip 

Whip Length versus Frequency Coverage 

4 ft. -- 1.8 MHz to 30.0 MHz 
5 ft. -- 1.7 MHz to 29.0 MHz  
6 ft.-- 1.6 MHz to 28.0 MHz 
8 ft.-- 1.5 MHz to 20.0 MHz 
12 ft.-- 1.2 MHz to 15.0 MHz  
 

CH-1 -- Capacitance Hat 

Hat only -- 1.8 MHz to 30.0 MHz 
Hat with 3 ft. whip 

 1.6 MHz to 25.0 MHz  

Hat with 6 ft. whip 

 1.5 MHz to 21.0 MHz 

Our standard whip is 6 ft. long; it can be cut to any length for the coverage you need. 

Keep  in  mind  that  the  longer  your  whip  is  the  better  the  performance  will  be  on  the 
lower bands, however you will loose your upper frequencies with the longer whip.  
 

Always try to use the longest whip possible for best performance. After mounting of the 
antenna you need to route your antenna control cable and your coax cable 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. However, if you are having problems with this initial 

tuning please call. 

Operation 

Remember that when the coil is all the way in, it's 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 

watts and watch the SWR meter till the dip. 

 
 

Summary of Contents for 300A

Page 1: ...nnas Inc Instruction Manual for the Model 300A Continuous Coverage HF Antenna 18511 CR 304 St Joseph MO 64505 816 671 9409 816 662 2416 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 300A 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 300A Antenna Specifications Lower Mast Length 3ft Frequency Coverage with 6 whip 1 7 to 28 MHz Power Rating 250 watts P E P Typical SWR 1 5 to 1 or less Total Height with 6 whip at 29 MHz 9 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: ...uning positions of the Model 300A Tarheel Antennas LEXAN COVER REMOVED FOR CLARITY Model 300A full down position with 5 ft whip 28 0 MHz Model 300A 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 300A 3 9 MHz with 5 ft whip and 4 of coil showing Model 300A 3 5 MHz with 5 ft whip with 5 of coil showing Model 300A 1 9 MHz with 5 ft whip and 15 of coil showing Model 300A 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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