LNR EF-40 40M End FED Dipole User Manual

: June 16, 2024
: LNR

Table of Contents

LNR EF-40 40M End FED Dipole
Product Information
FAQ
PARTS LIST
ASSEMBLY
SPECIFICATIONS
CONTACT
References
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Download This Manual (PDF format)

LNR EF-40 40M End FED Dipole

LNR-EF-40-40M-End-FED-Dipole-PRODUCT

Product Information

Assembly Instructions

To assemble the ENDFEDZ EF-40, follow the steps below:

Step 1: Matchbox Installation

Take the 40 METER EF MATCHBOX (PART NO. SUB7001) and attach it to a suitable mounting location.

Step 2: Radiator Installation

Take the 40M RADIATOR 65′ 6 (PART NO. 701) and connect it to the matchbox using the provided hardware (PART NO. 2814, PART NO. 2815).

Step 3: End Insulator Installation

Attach the END INSULATOR (PART NO. 1409) to the end of the radiator.

Step 4: Tuning Stub Installation

Install the TUNING STUB (PART NO. 706) if necessary for bands other than the design band.

Product Usage

The ENDFEDZ EF-40 is designed for use as an end-fed dipole antenna on the 40-meter band. Follow the guidelines below for optimal usage:

Mounting Options

GUY: Use guy wires to provide additional support for the antenna.
RADIATOR: Attach the radiator to a suitable support structure.
COAX: Connect the coaxial cable to the matchbox for signal transmission.
INVERTED L: Install the antenna in an inverted L configuration for specific applications.
SLOPER: Use the sloper configuration for directional signal propagation.

Important Note

Using the antenna on bands other than the design band may lead to significant coax radiation and could potentially damage the matchbox. Ensure you operate within the specified frequency range.

Tuning

If necessary, use the provided TUNING STUB (PART NO. 706) to fine-tune the antenna for bands other than the design band. Follow the instructions provided in the EF-40 MANUAL (PART NO. 705) for tuning guidance.

FAQ

Q: Where can I find the EF-40 manual?
A: You can find the EF-40 manual at https://manual-hub.com/.
Q: What is the power handling capability of the ENDFEDZ EF-40?
A: The ENDFEDZ EF-40 can handle a maximum power of 200W.
Q: What is the length of the radiator?
A: The radiator is 65′ 6″ long.
Q: What is the connector type for the radiator?
A: The connector for the radiator is a Silver/Teflon SO-239 connector.
Q: Can I use the ENDFEDZ EF-40 on bands other than the design band?
A: Using the antenna on bands other than the design band may result in significant coax radiation and could potentially damage the matchbox. It is recommended to operate within the specified frequency range.

PARTS LIST

PART NO. QTY DESCRIPTION

SUB7001 1 40 METER EF MATCHBOX
701 1 40M RADIATOR 65’ 6”
1409 1 END INSULATOR
14417 1 #10 SPLIT RING LOCKWASHER
2814 1 #10 STAINLESS HEX NUT
2815 2 #10 STAINLESS FLATWASHER
32767 1 SHIPPING BOX
705 1 EF-40 MANUAL
706 1 TUNING STUB

ENDFEDZ ARE MONO BAND MATCHED ANTENNAS. THEY WILL NOT REQUIRE A TUNER– TAKE THE TIME TO ADJUST THE ANTENNA.
USE ON BANDS OTHER THAN THE DESIGN BAND WILL RESULT IN SIGNIFICANT COAX RADIATION AND MAY RUIN THE MATCHBOX

LNR-EF-40-40M-End-FED-Dipole-FIG-1

ASSEMBLY

This antenna is essentially a half-wave dipole with one important difference– the feedline is at the end of the antenna. The antenna is suspended at its ends by the two included end insulators– one of which is integral to the matchbox.
Remove the tuning stub from the end insulator and set it aside– you will not likely require its use.
To have the least possible influence on the antenna, insulated lines are recommended for attachment to the insulators. The antenna may be suspended horizontally, vertically or sloping. Portable operation is easily accomplished by suspending the far end from a tree limb and letting the matchbox hang just above the ground.
The antenna has been used in hotel rooms by hanging the matchbox end just outside the window and letting the far end hang or preferably pulling it away from the building with a guy attached to the end insulator.
Tuning is best accomplished by using an antenna analyzer attached to the far end of the coaxial cable that will be used with the antenna. Once the initial resonant frequency is established, the antenna may be tuned just like a dipole. Shortening the far end by 6” will raise the resonant frequency to approximately 25 KHz. Tighten the #10 hardware just enough to compress the lock washer.
NOTE: Should you cut the radiator too short during tuning, use the enclosed stub as in Fig 2 and continue tuning by pruning the stub.
Once you are satisfied with the overall length of the radiator, Lace the radiator through all three holes as shown in Fig 1.
Fig. 3 illustrates some mounting ideas.