MFJ-259B Antenna Analyzer Modification

MFJ-259B Antenna Analyzer Modification, Home › Forums › temp › MFJ-259B Antenna Analyzer Modification, Viewing 3 posts – 1 through 3 of 3 total Author, Posts, July 11, 2013 at 3:11 am #8597, mojoe, Participant, Total posts : 25, First, a word of warning, If the information in this post doesn’t make sense to you, you probably shouldn’t be modifying your antenna analyzer, These

MFJ-259 Calibrating

Overview

MFJ 259 antenna analyzer calibration, problems, and

Calibrating the MFJ-259B Antenna Analyzer This calibration procedure is the correct procedure for later MFJ-259B’s, Take any other information with a grain of salt,

WB4IUY’s Random Blog: MFJ-259 Antenna Analyzer Repairs

MFJ-259 Antenna Analyzer Repairs I pulled out my MFJ–259 antenna analyzer to start tuning my Force-12 antenna, and discovered that it had a problem It would not operate on the last 2 bands lowest frequency ranges, Upon inspection of the internals, I discovered a battery had leaked acid on the main PCB and caused some damage, I washed the board with electronics cleaner and windex …

MFJ 259

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•MFJ lists the MFJ 259 as a “HF/VHF SWR Analyzer ” •AKA: “ONE PORT VECTOR NETWORK ANALYZER VNA” •Measures the electrical parameters of one port of a network •Won’t measure transmission parameters of a 2 port network •Network = Electrical Circuit •A port is one complete signal path •“Vector” = measures both magnitude and phase One Port Network + _ IMPEDANCE SWR

TABLE OF CONTENTS

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The MFJ–259 SWR Analyzer is an easy to operate, versatile test instrument for analyzing nearly any 50 ohm RF system on frequencies between 1,8 and 170 MHz, In addition the MFJ– 259 can be used as signal source and as an accurate frequency counter, The MFJ–259 combines four basic circuits; a wide range oscillator, a frequency counter, a 50 ohm RF bridge, and a calibrated bridge unbalance

MFJ 269 SWR Antenna Analyzer

This is the modification that every MFJ 269 or 259 should have had from the factory, If you have every needed to change the batteries in your MFJ Analyzer in

MFJ-259 Analyzer, MFJ259

MFJ–259 Analyzer, MFJ259, The MFJ–259 SWR Analyzer is an easy to operate, versatile test instrument for analyzing nearly any 50 ohm RF system on frequencies between 1,8 and 170 MHz, In addition the MFJ– 259 can be used as signal source and as an accurate frequency counter, The MFJ–259 combines four basic circuits: a wide range oscillator, a

eHam,net

Analyzer great – MFJ BAD! Time Owned: more than 12 months, The 259 is the standard for antenna analysis and components; that’s the good news, the bad news is their service which is almost non-existent, I have had MFJ products for decades and their service was acceptable but that was then and now their repair service is awful!

Tuning my MFJ 1796 for low SWR,

I have since purchased a MFJ-259C antenna analyzer and tuned the antenna in a little over two hours went well, Easy with the analyzer worth the money, Is working out well and the antenna is made for ground or tower mount, Had to trim all the rods to get where I needed to be, I would suggest you first mount the tower low where you can get at it or be able to tilt, Makes it real easy to tune, So

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How To Use An Antenna Analyzer

I show you how to use an MFJ 259/269 Antenna Analyzer to check your antenna for SWR and resonance,

HF/VHF SWR Analyzer

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MFJ-259C Instruction Manual HF/VHF SWR Analyzer 2 1,0 Introduction The MFJ-259C is a compact battery-powered RF-impedance analyzer that covers 0,53-230 MHz in nine overlapping bands, Fully portable and self contained, it delivers a wide range of basic and advanced RF measurements to present a complete picture of your antenna systems and

MFJ 259 antenna analyzer calibration, problems, and

MFJ 259 antenna analyzer calibration, problems, and service warnings; MFJ-1025/1026; Mixing Wide and Narrow Modes; Mobile antennas, short verticals, loading coil loss,and loading coil current ; Mobile Antenna Current Measurements at W8JI; Mobile Antenna FS Comparisons; Mobile Radio Wiring and Grounding; Modification for FT1000 and FT1000D Keyclicks; multi band super mini loop antenna; …

MFJ 259B Antenna Analyzer– Back from MFJ Service Repair

This is a follow up to previous video where impedance was showing high on the homebrew QRP Dummy Load, The issue was four diodes in the analyzer, Very happ