MFJ MFJ-57B Manual de usuario

MFJ –57B Instruction Manual PVC Cross Loop Antenna Kit

1

MFJ-57B PVC Cross Loop Antenna Kit

Introduction:

The MFJ –57B PVC Cross Loop Antenna Kit is designed to be used along with the MFJ-

933, MFJ-935B and MFJ-936B Small High Efficiency Loop Tuners to provide coverage

on 10.100 –14.350 MHz by using only one loop length. The length provided in this kit,

13-feet, is designed to be most efficient on 14.350 MHz, and the loop can be tuned lower

in frequency with some efficiency loss. Exact frequency coverage and efficiency depends

on each individual installation involving shape of loop, height above ground level, and

operating environment.

Loop Length Band Coverage

13 feet----------------30 – 20 Meters (10.100 –14.350 MHz)

Parts included in this kit:

•3–PVC Cross Arms, Notched for loop wire

•1–PVC Cross Base, Un-notched

•1–PVC Cross Connector

•1–Insulated, 10 gauge Flexible Loop wire for 30 –20 Meters, 13 ft long with

low resistance lugs

Installation Instructions:

1. Assemble the PVC Cross Mount as shown in Figure 1.

a. Place Notched PVC Cross Arms (2) on each side and top of the PVC Cross

Connector (3).

b. Place Un-notched PVC Cross Base (4) on the bottom of the PVC cross

Connector (3) and fit into the Cap (5) on the top of the Loop Tuner (6) as

shown in Figure 1.

2. Place the Loop Tuner (6) at the chosen place of operation and attach the Flexible

Loop (1) as shown in Figure 1.

a. Place the Flexible Loop (1) wire around the PVC cross mount and fit into

the notches on the Notched PVC Cross Arms (2) forming a loop.

b. Attach the lugs to the rear panel of the tuner using the wing nut terminals

provided on the back of the Loop Tuner.

3. Read and follow Loop Tuner instruction manual for system operation.

MFJ –57B Instruction Manual PVC Cross Loop Antenna Kit

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Figure 1: PVC Cross Mount Loop

Assembly

Notched PVC

Cross Arms

(2)

PVC

Cross Connector

(3)

Un-notched

PVC

Cross Base

(4)

Loop

Tuner

(6)

Flexible

Loop

(1)

Cap

(5)

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