Tarheel Antennas 400A User guide

UNITED STATES OF AMERICA

Tarheel Antennas, Inc.

Instruction Manual

for the

Model 400A

Continuous Coverage

HF Antenna

PROUDLY MADE IN THE

18511 CR 304

St. Joseph, MO 64505

816-671-9409 / 816-364-2619 Fax

E-mail: [e-mail]

Technical Support

919-552-8788

E-mail: [e-mail]

www.tarheelantennas.com

Thank you for purchasing the

Model 400A Tarheel Antenna

Packing List for Model 400A

Model 400A Antenna

6 ft. Stainless Steel Whip

Up/Down Switch

20 ft. Control Cable

Ferrite Core

Fuse Holder & Fuse

1 tube of Dielectric Compound

Manual

Packing 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 6’ whip at 1.7 MHz – 12’4”

Weight – 9.0 lbs.

Picture 1

–MT-

1 & MT

-

30FB

Installation

Picture 2

–MT-

1 & MT

-5Picture 3

–MT-

1 &MT-

3FB

Picture 4

–MT-

1 & Automatic Lift & Lay

Picture 5

–MT-

1 & MT

-

3

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.

The MT-1 antenna bracket is designed to make your antenna
mounting convenient and incredibly strong. Made to clamp to
standard 1” pipe (1.312 OD) or bolted to a flat surface.
(Picture 6)

There are a few steps to make sure you
install the MT-1 antenna bracket the way it is
intended. First you need to install the upper
half of the quick disconnect in the bottom of
the antenna tight (Picture 7). Be sure to use

the lock washer.

Picture 6

Picture 7

The MT-1 antennas bracket has 6 cutouts for the anti­rotation 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 plate and the quick
disconnect. (Pictures 9 & 10)

Picture 8

Picture 9 Picture 10

Included with the antenna is a special mix
#31 ferrite core that needs to be mounted
on the control wire as close to the
antenna as possible. Loop the wire
through the choke at least 3 times.
(Picture 11) It is used to decouple the
control cable from the antenna. If you fail

Picture 11

to install this ferrite core acts like a single
radial and the antenna will be untunable.

The up/down switch (Picture 12) that comes
with the antenna package will plug directly into
the control cable to the antenna, then there will
be 2 wires left on the switch. One will be white
with red dots and one red with black dots. This
system is designed for 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

Picture 12

go up while you press the up button (this is

the way most wire up to their systems). Up
on the switch means the antenna is going UP in the band and DOWN in the bottom (this
is the way most wire up to their systems). Up on the switch means the antennas is
going up in height and Down in frequency. If you prefer that is reversed all you have to
do is reverse the connections. Be sure you add the fuse to the positive side.

Most installs:

Red with black dots – 12 volt positive

White with red dots – 12 volt ground

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 28.0 MHz
6 ft.-- 1.6 MHz to 26.0 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.

Model 400

--

full down position with

5 ft. whip

--

28.0 MHz

Do not try to twist or turn the bug shield on
the outside of the antenna, this is designed
not to turn.

Relative Tuning Positions

The following photos will show you relative tuning positions of the Model
400 Tarheel Antennas.

LEXAN COVER REMOVED FOR CLARITY

Model 400 -- 21.2 MHz with 5 ft. whip

Model 400 -- 14.2 MHz with 5 ft. whip

and 1/2" of coil showing

Model 400 -- 7.1 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 -- 1.9 MHz with 5 ft. whip

and 15" of coil showing

Model 400 -- 3.5 MHz with 5 ft. whip

with 5" of coil showing

Model 400 -- 1.8 MHz with 5 ft. whip

and 16 1/2" of coil showing

Maintenance

Very little maintenance is required for your Tarheel Antenna. You should have years of
trouble free service from this antenna. You've made a large investment for a mobile
antenna. Here is a tip to help take care of your investment.

We use an automotive finish on this antenna so whenever you wash and wax your
vehicle raise your antenna and wash and wax the shaft and the bug shield (Lexan tube),
with wax on your antenna the bugs will have a harder time sticking to it.

About once per year or so, depending on how much driving you do and where the antenna is
mounted you will need to wash the coil to remove any road grime, no parts to replace. Also a
dirty coil will show vertical black streaks.

Here's how to clean the coil:

1. Run the antenna up till all the coil is exposed.

2. Remove the are 3 screws in the top Delrin Cap.

3. Then slide the Lexan bug shield down to expose the coil, next feel the coil, is it sticky?

4. If so it's dirty, now wipe the coil with alcohol.

5. Then lightly scrub the coil with a Scotch-Brite pad (available at any hardware store).

6. Then one more wipe with alcohol and that'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 has a
ONE YEAR NO MATTER WHAT WARRANTY to the original owner. If for any reason
(other than damage due to unauthorized disassembly, negligence, improper
use, or use of Non-recommended Controllers) your Tarheel Antenna fails to
perform due to quality or workmanship Tarheel Antennas, Inc. will at our discretion
either repair or replace at no charge for parts or labor. Shipping charges are your

(the customer's) responsibility to and from Tarheel Antennas' repair shop. We here

at Tarheel Antennas hope you enjoy one of the best performing, best built, best looking
motorized antennas available.

We here at Tarheel Antennas hope you enjoy one of the best performing, best built,
best looking motorized antennas available.

Please pa ss along any suggestions you may have to make our antenna better.
All suggestions are appreciated. Also when you have your antenna installed please
send us pictures.

Thanks,
Tarheel Antennas