MFJ 2013 Manuel utilisateur

INSTRUCTION MANUAL

CAUTION: Read All Instructions Before Operating Equipment

MFJ ENTERPRISES, INC.

300 Industrial Park Road

Starkville, MS 39759 USA

Tel: 662-323-5869 Fax: 662-323-6551

Model MFJ-2013

VERSION 1A

MFJ-2013 Instruction Manual 30/60 Meter OCFD

DISCLAIMER

Information in this manual is designed for user purposes only and is not

intended to supersede information contained in customer regulations, technical

manuals/documents, positional handbooks, or other official publications. The

copy of this manual provided to the customer will not be updated to reflect

current data.

Customers using this manual should report errors or omissions,

recommendations for improvements, or other comments to MFJ Enterprises, 300

Industrial Park Road, Starkville, MS 39759. Phone: (662) 323-5869; FAX:

(662) 323-6551. Business hours: M-F 8-4:30 CST.

MFJ-2013 Instruction Manual 30/60 Meter OCFD

MFJ-2013 Off-Center Fed Dipole

for 30/60 meters

Introduction

The MFJ-2013 is a “no-compromise” OCFD designed to deliver low

SWR, wide bandwidth, and high efficiency on both bands. On 60 Meters,

it functions as a ½-wave dipole and delivers the same gain as a dipole for

purposes of calculating ERP. On 30 Meters, it develops a full-wave

cloverleaf pattern that provides significant gain in many directions over a

conventional dipole (great for QRP). Note that the center frequencies for

30 and 60 Meters do not fall in a direct even-harmonic relationship,

resulting in an offset of a few hundred kHz. A coil installed in the shorter

leg compensates for this offset and ensures the lowest SWR at both

band centers.

Installing Feedline

Feed the MFJ-2013 with lightweight coax such as RG-58 or RG-8X to

limit wire strain and to minimize visibility. A transition to larger low-loss

cable at ground level is suggested for long coax runs. Allow the feedline

to drop straight down at a right angle to minimize stray coupling.

MFJ-2013 Instruction Manual 30/60 Meter OCFD

Installation

Best mounting height is between 40 and 70 feet, with 50 feet being ideal.

Where possible, locate away from parallel wires that might de-tune the

element. If a high support is available near the feed point, attach a

halyard to the feed block for added support (see below). Jacketed wire

makes the antenna nearly invisible and also allows some incidental

contact with branches and leaves. However, avoid routing through dense

vegetation as it will degrade performance and alter tuning. The MFJ-2013

spans roughly 86 feet. If your end supports are too close together, note

that the friction-locking end insulators allow you to “droop” one or both

legs. Feed excess wire through the retention holes and allow it to dangle

below (drop longer leg first). You may also install the MFJ-2013 as an

inverted “V”.

Insulator

Drooped End

Support Halyard

Inverted "V"

Power Rating

The MFJ-2013 matching network can handle up to 300-Watts PEP on

SSB or CW (50% of that level for RTTY and other high power-density

modes).

Directivity

The MFJ-2013 has a “dipole” pattern at 5.35 MHz and a full-wave

cloverleaf pattern on 10.1 MHz. For best 30-Meter DX, consider mounting

the antenna 45-degrees off axis rather than directly broadside to your

favored direction.

Other Bands

Efficient operation is also possible on 15 Meters with a tuner connected in

the line. Resonance typically falls slightly above the 21-MHz band, but the

MFJ-2013 Instruction Manual 30/60 Meter OCFD

antenna still exhibits substantial gain in several directions on the 21-MHz

band.

Technical Assistance

If you have any problem with this unit first check the appropriate section

of this manual. If the manual does not reference your problem or your

problem is not solved by reading the manual you may call MFJ Technical

Service at 662-323-0549 or the MFJ Factory at 662-323-5869. You will

be best helped if you have your unit, manual and all information on your

station handy so you can answer any questions the technicians may ask.

You can also send questions by mail to MFJ Enterprises, Inc., 300

Industrial Park Road, Starkville, MS 39759; by Facsimile to 662-323-

6551; or by email to techinfo@mfjenterprises.com. Send a complete

description of your problem, an explanation of exactly how you are using

your unit, and a complete description of your station.

In Case of Difficulty

MFJ warrants that your MFJ-2013 will be shipped complete and free from

defect. If your antenna is missing parts or contains damaged items,

contact the factory by phone at (662) 323-5869 to arrange for

replacement items, or write. Our mailing and shipping address is: MFJ

Enterprises, 300 Industrial Park Road, Starkville, MS 39759. Please do

not return any items to MFJ unless explicitly authorized to do by MFJ

Customer Service.

MFJ-2013 Instruction Manual 30/60 Meter OCFD

NOTES:

MFJ-2013 Instruction Manual 30/60 Meter OCFD

LIMITED 12 MONTH WARRANTY

MFJ Enterprises, Inc. warrants to the original owner of this product, if manufactured by

MFJ Enterprises, Inc. and purchased from an authorized dealer or directly from MFJ

Enterprises, Inc. to be free from

defects in material and workmanship for a period of 12 months from date of purchase

provided the following terms of this warranty are satisfied.

1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check,

credit card or money order receipt, etc.) describing the product to establish the validity of

the warranty claim and submit the original or machine reproduction of such proof of

purchase to MFJ Enterprises, Inc. at the time of warranty service. MFJ Enterprises, Inc.

shall have the discretion to deny warranty without dated proof-of-purchase. Any evidence

of alteration, erasure, or forgery shall be cause to void any and all warranty terms

immediately.

2. MFJ Enterprises, Inc. agrees to repair or replace at MFJ's option without charge to the

original owner any defective product under warrantee provided the product is returned

postage prepaid to

MFJ Enterprises, Inc. with a personal check, cashiers check, or money order for $10.00

covering postage and handling.

3. This warranty is NOT void for owners who attempt to repair defective units.

Technicalconsultation is available by calling the Service Department at 662-323-0549 or

the MFJ Factory at 662-323-5869.

4. This warranty does not apply to kits sold by or manufactured by MFJ Enterprises, Inc.

5. Wired and tested PC board products are covered by this warranty provided only the

wired and tested PC board product is returned. Wired and tested PC boards installed

in the owner's cabinet or connected to switches, jacks, or cables, etc. sent to MFJ

Enterprises, Inc. will be

returned at the owner's expense unrepaired.

6. Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to

person or

property by the use of any MFJ products.

7. Out-of-Warranty Service: MFJ Enterprises, Inc. will repair any out-of-warranty

product provided the unit is shipped prepaid. All repaired units will be shipped COD to

the owner. Repair charges will be added to the COD fee unless other arrangements are

made.

8. This warranty is given in lieu of any other warranty expressed or implied.

9. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or

manufacture without incurring any obligation to install such changes upon any of the

products previously manufactured.

10. All MFJ products to be serviced in-warranty or out-of-warranty should be addressed

to: MFJ Enterprises, Inc.

300 Industrial Park Road

Starkville, Mississippi 39759 USA

and must be accompanied by a letter describing the problem in detail along with a copy

of your dated proof-of-purchase.

11. This warranty gives you specific rights, and you may also have other rights

which vary from state to state.

MFJ-2013 Manual

Version 1A

Printed In U.S.A.

300 Industrial Park Road

Starkville, MS39759

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