Due to continual product improvements, the information in this manual is subject to change any time without notice. TransWorld Antennas will be held free from liability, any problems arising from the use of this manual or the products described herein. Manual Rev V1.0 TW4040 Instruction Manual...
This warranty gives you specific rights. Other rights may apply, which vary from state to state. An optional extended limited warranty purchased from TransWorld Antennas extends the period of this warranty to 24 months or 36 months, depending on warranty product purchased. TW4040 Instruction Manual...
5. While your antenna is on Tx mode (transmitting) DO NOT stand nearby. 6. It is recommended to strictly respect the maximum power settled by law and follow the instructions manual of the product. 7. Stick self-adhering “DANGER” label at eye level on your mast. TW4040 Instruction Manual...
The TW4040 is a center fed vertical dipole antenna with a very low radiation take-off angle (around 27 degrees above horizontal), allowing for very long skips using low power on 40 meters.
VSWR of 1.5:1 or less. Test conditions: 100 feet of quality RG8/U coax, 100W output power, antenna mounted approx. 24” above ground with no external objects, metallic or otherwise, within 20ft radius of the antenna. TW4040 Instruction Manual...
Save all packaging materials! The original shipping materials may serve as a very handy travel box for portable applications. Also, if the antenna is returned for warranty or money-back guarantee claims, all original packaging materials will be required for approved shipping. TW4040 Instruction Manual...
See below for a summary of these four components. Top Section 32.2” x 6.25” x 3.8” Middle Section 30.13” x 7.41” x 4.88” Bottom Section 33.75” x 6.25” x 3.8” Permanent Mounting Assembly 48.00” x 3.20” x 1.25” TW4040 Instruction Manual...
TW4040 TransWorld Antennas 6 Getting Started Getting started with your new TW4040 is quick and easy. Follow these steps to get started using your new antenna right away. 6.1 Tools Needed A small Phillips screwdriver should be the o n l y...
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Second, attach the middle section to the top section as shown in step 2 below. Again, the clamp knob stud should fully engage with the slots on the end of the top section. Tighten the clamp knob snugly. TW4040 Instruction Manual...
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Permanent Mounting Assembly’s insulator rod. As with assembly above, the slots on the end of the bottom section should fully engage with the mounting assembly’s clamp knob stud. Firmly tighten the clamp knob. TW4040 Instruction Manual...
Coax cable. Connect your coax cable to your radio and to the SO-239 on the TW4040’s loading array box. It is highly recommended to use at least 65 feet of coax on your TW4040. For best performance, use a high quality RG-8 or RG-8X coax cable.
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2) Tune. Determine to what frequency the antenna is best tuned. If you wish to increase the tuned frequency, spread open both “Coils A” and “Coils B” on the circuit board, as shown in the figure below. TW4040 Instruction Manual...
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Is your coax installed at a 45-degree angle with respect to the antenna as in the figure on page 11? Are you checking the VSWR using less than five watts? Once at least five watts is applied to the antenna, VSWR readings may improve significantly. TW4040 Instruction Manual...
Use this email address for help with installation, setup, tuning, or operation, for product or company information, or warranty/money back guarantee claims. Check back at our website frequently for product updates at: www.transworldantennas.com We can also be reached through our web-based contact system on the website. TW4040 Instruction Manual...
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