Port P able ort Magnet Magne ic Loop Ant An e t nna KG5EAO Rick Bono August Augus 11, 2015
|
|
- Colin Armstrong
- 6 years ago
- Views:
Transcription
1 Portable Magnetic Loop Antenna KG5EAO Rick Bono August 11, 2015
2 Overview Develop a portable magnetic loop antenna for use on HF bands running QRP. Easy to deploy Ideally run on 40m through 10m bands For theory and discussion try Steve Yates (AA5TB) website at: Design calculations were made with Steve s Excel spreadsheet also in the link above.
3 Magnetic Loop Antenna Design Points Thefollowing pages show thedesign points for the magnetic loop using a 10 foot length of RG 213 coax. RG 213 shield diameter is.314 inches
4 40m Design Point Design Frequency = 7.000MHz Loop Diameter = 3183feet 3.183feet 0970m 0.970m Conductor Diameter = 0.314inches 7.976mm Added Loss Resistance = 0.000milliohms RF Power = Watts Calculated Results: Bandwidth = 9.573kHz (-3 db points) Efficiency = 5.770% dB Loop Area = 7.958ft² 0.739m² Radiation Resistance = 5.139mΩ Total Loss Resistance = mΩ Loop Circumference = ft 000ft 3.048m Wavelength Percentage = 7.117% λ Loop Inductance = 2.961μH Distributed Capacitance = 8.200pF Q (Quality Factor) = Tuning Capacitor = pF Capacitor Voltage = V148V Minimum Plate Spacing = mils (1/1000 in) 0.467mm Circumference a bit low for 7MHz Requires 182pF of capacitance at high limit 5.8% efficiency with 9.5kHz Bandwidth
5 20m Design Point Design Frequency = MHz Loop Diameter = 3183feet 3.183feet 0970m 0.970m Conductor Diameter = 0.314inches 7.976mm Added Loss Resistance = 0.000milliohms RF Power = Watts Calculated Results: Bandwidth = kHz (-3 db points) Efficiency = % dB Loop Area = 7.958ft² 0.739m² Radiation Resistance = mΩ Total Loss Resistance = mΩ Loop Circumference = ft 000ft 3.048m Wavelength Percentage = % λ Loop Inductance = 2.961μH Distributed Capacitance = 8.200pF Q (Quality Factor) = Tuning Capacitor = pF Capacitor Voltage = V807V Minimum Plate Spacing = mils (1/1000 in) 0.622mm
6 17m Design Point Design Frequency = MHz Loop Diameter = 3183feet 3.183feet 0970m 0.970m Conductor Diameter = 0.314inches 7.976mm Added Loss Resistance = 0.000milliohms RF Power = Watts Calculated Results: Bandwidth = kHz (-3 db points) Efficiency = % dB Loop Area = 7.958ft² 0.739m² Radiation Resistance = mΩ Total Loss Resistance = mΩ Loop Circumference = ft 000ft 3.048m Wavelength Percentage = % λ Loop Inductance = 2.961μH Distributed Capacitance = 8.200pF Q (Quality Factor) = Tuning Capacitor = pF Capacitor Voltage = V Minimum Plate Spacing = mils (1/1000 in) 0.597mm
7 15m Design Point Design Frequency = MHz Loop Diameter = 3183feet 3.183feet 0970m 0.970m Conductor Diameter = 0.314inches 7.976mm Added Loss Resistance = 0.000milliohms RF Power = Watts Calculated Results: Bandwidth = kHz (-3 db points) Efficiency = % dB Loop Area = 7.958ft² 0.739m² Radiation Resistance = mΩ Total Loss Resistance = mΩ Loop Circumference = ft 000ft 3.048m Wavelength Percentage = % λ Loop Inductance = 2.961μH Distributed Capacitance = 8.200pF Q (Quality Factor) = Tuning Capacitor = pF Capacitor Voltage = V801V Minimum Plate Spacing = mils (1/1000 in) 0.558mm
8 12m Design Point Design Frequency = MHz Loop Diameter = 3183feet 3.183feet 0970m 0.970m Conductor Diameter = 0.314inches 7.976mm Added Loss Resistance = 0.000milliohms RF Power = Watts Calculated Results: Bandwidth = kHz (-3 db points) Efficiency = % dB Loop Area = 7.958ft² 0.739m² Radiation Resistance = mΩ Total Loss Resistance = mΩ Loop Circumference = ft 000ft 3.048m Wavelength Percentage = % λ Loop Inductance = 2.961μH Distributed Capacitance = 8.200pF Q (Quality Factor) = Tuning Capacitor = pF Capacitor Voltage = V Minimum Plate Spacing = mils (1/1000 in) 0.514mm
9 10m Design Point Design Frequency = MHz Loop Diameter = 3183feet 3.183feet 0970m 0.970m Conductor Diameter = 0.314inches 7.976mm Added Loss Resistance = 0.000milliohms RF Power = Watts Calculated Results: Bandwidth = kHz (-3 db points) Efficiency = % dB Loop Area = 7.958ft² 0.739m² Radiation Resistance = mΩ Total Loss Resistance = mΩ Loop Circumference = ft 000ft 3.048m Wavelength Percentage = % λ Loop Inductance = 2.961μH Distributed Capacitance = 8.200pF Q (Quality Factor) = Tuning Capacitor = pF Capacitor Voltage = V Minimum Plate Spacing = mils (1/1000 in) 0.452mm Circumference a bit high for 28MHz Requires 10.5pF of capacitance at high limit 89% efficiency with 169.9kHz Bandwidth
10 Loop performance vs. Frequency (assumes no additional Losses) Loop Performance Efficiency (db) Frequency (1-30 MHz) Bandwidth (khz) db khz
11 Construction Frame built from ¾ PVC pipe. Four 2 sections of pipe on a central PVC cross. Frame supported on a standard camera tripod. 4 x4 x2 4x4x2 Plastic Junction box used to hold an air variable capacitor, the wiring and two SO 259 connectors. Loop made from a 10 foot RG 213 patch cable 6:1 gear reducer mounted to capacitor shaft for easier tuning Junction box mounted to Lower PVC pipe section with metal strap. Wooden dowel stick attached to capacitor for tuning Unshielded coupling loop made from a RG 8X patch cable. Loop approximately 1/5 diameter of mainloop. Capacitor is a two gang air variable capacitor with a plate spacing of Gang #1: 7 65pF Gang #2: 5 46pF
12 Loop Photos
13 Initial Results Antenna will tune up on 20m through 15m. 40m will tune up with a 120pF Silver Mica capacitor in parallel with variable Capacitor Tested extremes are at MHz and MHz Capacitance calculates to 16.6pF to 80pF Did not take into account the distributed capacitance Will achieve tuning on 17m and 10m with a smaller loop (i.e. 5 pr 6 ft). At 14Mhz, capacitor was at 45.35pF (not counting any distributed capacitance).
14 Cost Estimates AirVariable Capacitor $8.99 Ebay 3ft RG8X Patch Cable $4.65 Ebay 10ft RG 213 Patch Cable $17.95 Amazon (2x) UHF Panel Jacks $4.38 Amazon Two hole 3/4 strap $ Home Depot #10 32 x 3/4 Screws $1.18 Home Depot 4x4x2 Plastic Junction Box $6.88 Home Depot (4x) 2ft 3/4 PVC pipe pp $6.28 Home Depot 3/4 PVC Cross $1.97 Home Depot 6:1 Shaft Reducer $12.00 Xtal Set Society Total Material Cost: $65.45
15 20m Frequency Sweep
16 17m Frequency Sweep
17 15m Frequency Sweep
18 40m Frequency Sweep 120pF capacitor in parallel l
19 Power Handling & Tuning Tested on 25W using Yaesu FT 450D without issue. Higher power started arcing. Given humidity is fairly high at the QTH will limit power to 20W max. Tuning is accomplished by adjusting capacitor for maximum receive noise then bringing SWR in with a quick fine tune. Antenna has good receive properties.
20 Stations worked During Initial Testing 5W SSB, 20m band on Yaesu FT 817ND Outdoors: worked Belgium, Cuba and California Indoors: worked Bosnia Herzegovina, Czech Republic and Indiana 30W SSB, 20m band on Yaesu FT 450D Indoors: worked Venezuela 5W SSB, 40m band on Yaesu FT 817ND No contacts made.
21 Conclusion Basic design goal of an easily deployed, portable HF antenna was accomplished Trick is finding a suitable capacitor Easy to build and low cost Performs very well even with design compromises. Future F work: Test 12m & 10m with smaller loop Test 40m with larger loop diameter Build less portable with larger conductor diameter for better efficiency and with vacuum capacitor Auto tuning
Portable Magnetic Loop Antenna. KG5EAO Rick Bono
Portable Magnetic Loop Antenna KG5EAO Rick Bono April 2, 2016 Overview Develop a Portable magnetic loop antenna for use on HF bands running QRP. Portable and easy to deploy Ideally run on the 40m through
More informationHardware Store 40m Magnetic Loop Antenna for Regional and EMCOM Use. Richard Bono NO5V. QST Antenna Design Competition 80 through 10 meter entry
Hardware Store 40m Magnetic Loop Antenna for Regional and EMCOM Use Richard Bono NO5V QST Antenna Design Competition 80 through 10 meter entry Overview: This describes a field deployable magnetic loop
More informationAntenna. NO5V Rick Bono
Portable End Fed Half Wave Antenna NO5V Rick Bono October 15, 2016 Overview Develop a Portable End Fed Half Wave Antenna Portable and easy to deploy Multiband capability Resonant Antenna No Tuner Needed!
More informationA short, off-center fed dipole for 40 m and 20 m by Daniel Marks, KW4TI
A short, off-center fed dipole for 40 m and 20 m by Daniel Marks, KW4TI Version 2017-Nov-7 Abstract: This antenna is a 20 to 25 foot long (6.0 m to 7.6 m) off-center fed dipole antenna for the 20 m and
More informationMFJ Manual Loop Tuner Considerations
Pagina 1 0 items Proceed to Secure Checkout All Categories Accessories Analyzers Products Tuners Morse Code / CW Power Supplies Product Search Search! List All Products Site Menu Customer Account Order
More informationUser Guide for the Alpha Loop Sr Antenna
User Guide for the Alpha Loop Sr Antenna Manufactured by: Alpha Antenna 1.888.482.3249 Website: http://alphaantenna.com Available from: Amateur Radio Store Website: https://amateurradiostore.com User Guide
More informationMAGNETIC LOOP SYSTEMS SIMPLIFIED
MAGNETIC LOOP SYSTEMS SIMPLIFIED By Lez Morrison VK2SON Many articles have been published and made available on websites recently. Unfortunately they have tended to make construction sound complicated
More informationMilton Keynes Amateur Radio Society (MKARS)
Milton Keynes Amateur Radio Society (MKARS) Intermediate Licence Course Feeders Antennas Matching (Worksheets 31, 32 & 33) MKARS Intermediate Licence Course - Worksheet 31 32 33 Antennas Feeders Matching
More informationAmateur Extra Manual Chapter 9.4 Transmission Lines
9.4 TRANSMISSION LINES (page 9-31) WAVELENGTH IN A FEED LINE (page 9-31) VELOCITY OF PROPAGATION (page 9-32) Speed of Wave in a Transmission Line VF = Velocity Factor = Speed of Light in a Vacuum Question
More informationEnd Fed Half Wave Antenna Coupler
End Fed Half Wave Antenna Coupler The finished End Fed Half Wave antenna coupler. Centre fed half wave dipoles make great, simple and effective antennas for the HF bands. Sometimes however, the centre
More informationMiniature Magnetic Loops By David Posthuma, WD8PUO
Miniature Magnetic Loops By David Posthuma, WD8PUO Application Notes and Articles A General Overview After several years of curiosity and several months of research, I recently built two magnetic loops.
More informationAD5X. Low Cost HF Antennas & Accessories. Phil Salas - AD5X Phil Salas AD5X. Richardson, Texas
Low Cost HF Antennas & Accessories Phil Salas - AD5X ad5x@arrl.net PVC Tubing PVC pipe: Considers the inside diameter (ID) of the pipe. For PVC pipe (schedule 40): 1/2" PVC pipe has an ID of 0.6" and an
More informationHelically Loaded Magnetic Loop Antenna
Helically Loaded Magnetic Loop Antenna Object of the design: There are many designs and information available on the net concerning Magnetic Loop Antennas. Even though these antennas are a fraction of
More informationSmall Magnetic Loops: A Beginner s Guide WOW! This is a very different antenna!
Small Magnetic Loops: A Beginner s Guide WOW! This is a very different antenna! Dave Wickert, AE7TD Lake Washington Ham Club November 2018 Meeting 10-Nov-2018 Dayton Hamvention 2017 History Full Size Loops
More informationChapter 6 Antenna Basics. Dipoles, Ground-planes, and Wires Directional Antennas Feed Lines
Chapter 6 Antenna Basics Dipoles, Ground-planes, and Wires Directional Antennas Feed Lines Some General Rules Bigger is better. (Most of the time) Higher is better. (Most of the time) Lower SWR is better.
More informationAdjust Antenna Tuners Antenna Measurements Capacitor Measurement Measure Feed Point Impedance Measure Ground Loss Inductor Measurement
The Micro908 antenna analyzer is an extremely useful instrument to have around the ham shack or homebrewer s workbench. This section describes the basic uses, as well as some advanced techniques for which
More informationSolar Powered Portable Field Day Station. KG5EAO Rick Bono May 28, 2016
Solar Powered Portable Field Day Station KG5EAO Rick Bono May 28, 2016 Field Day To work as many stations as possible on any and all amateur bands (excluding the 60, 30, 17, and 12-meter bands) and in
More informationVHF/UHF Dual Band J-Pole. By: Ed Fong WB6IQN
VHF/UHF Dual Band J-Pole By: Ed Fong WB6IQN email: edison_fong@hotmail.com ARRL VHF/UHF Antenna Classics ARRL Vol. 8 Antenna Compendium ARRL Vol. 3 Antenna Compendium QST March 2007 QST February 2003 QST
More informationMagnetic Loop Antenna - Topbands
Magnetic Loop Antenna - Topbands Instruction Manual Thank you for purchasing this new product small Magnetic Loop Antenna Topbands. Manual contains important information. Please read all instructions carefully
More informationTechnician Licensing Class T9
Technician Licensing Class T9 Amateur Radio Course Monroe EMS Building Monroe, Utah January 11/18, 2014 January 22, 2014 Testing Session Valid dates: July 1, 2010 June 30, 2014 Amateur Radio Technician
More informationTWO METER HOMEMADE SLIM JIM ANTENNA
Gordon Gibby July 15, 2016 TWO METER HOMEMADE SLIM JIM ANTENNA WIRE: Start with a piece of solid #14 AWG household wire approximately 3 yards and 9 inches long (117 ) (It is easier to be a couple inches
More informationUser Guide for the Alpha QRP Loop Antenna
User Guide for the Alpha QRP Loop Antenna Manufactured by: Alpha Antenna 1.888.482.3249 Website: http://alphaantenna.com User Guide Version 2.0 Page 1 Table of Contents Introduction... 3 Product Overview...
More informationJC-5 4KW PEP, 1KW RMS AUTO ANTENNA COUPLER
JC-5 4KW PEP, 1KW RMS AUTO ANTENNA COUPLER 1) DIRECTLY CONTROLLED BY ICOM, ALINCO & KENWOOD. 2) INDEPENDENT CAPACITOR INPUT AND OUTPUT BLOCKS! 3) 3 mm COIL WIRE & INTERNAL FAN FOR THE BIG COILS! 4) DIPPED
More informationNick Garner N3WG and George Zafiropoulos KJ6VU
Nick Garner N3WG and George Zafiropoulos KJ6VU Introduction Over the last few years, there has been a significant increase in the number of radio amateurs interested in portable operating. This is due
More informationMFJ-249B HF/VHF SWR ANALYZER
TABLE OF CONTENTS MFJ-249B... 2 Introduction... 2 Powering The MFJ-249B... 3 Battery Installation... 3 Alkaline Batteries... 3 NiCd Batteries... 4 Power Saving Mode... 4 Operation Of The MFJ-249B...5 SWR
More information1.5 kw Automatic Remote Controlled Antenna Tuner for Verticals and other Unbalanced Antennas
1.5 kw Automatic Remote Controlled Antenna Tuner for Verticals and other Unbalanced Antennas Mod. AT- 615U Short Form Manual 10/2010 Dipl.Ing. Klaus Bemmerer RF Communication Electronics Niendorf-Middeldor
More informationOptimizing Your Stations Performance
Optimizing Your Stations Performance A few hints / techniques, recommendations for getting the most RF out to the Antenna from your HF, VHF / UHF station. Tonights Presenters: Doug Theriault NO1D John
More informationImproved Ionospheric Propagation With Polarization Diversity, Using A Dual Feedpoint Cubical Quad Loop
Improved Ionospheric Propagation With Polarization Diversity, Using A Dual Feedpoint Cubical Quad Loop by George Pritchard - AB2KC ab2kc@optonline.net Introduction This Quad antenna project covers a practical
More informationPortable Magnetic Loop Antenna Version Two
Portable Magnetic Loop Antenna Version Two The entire antenna assembled and hung up. Note the tuning head at the top matching unit at the bottom, with the spreader supported by the old felt tip pen lids
More informationAntenna Design for FM-02
Antenna Design for FM-02 I recently received my FM-02 FM transmitter which I purchased from WLC. I researched the forum on what antennas where being used by the DIY community and found a nice write-up
More informationJacques Audet VE2AZX. Nov VE2AZX 1
Jacques Audet VE2AZX VE2AZX@amsat.org Nov. 2006 VE2AZX 1 - REASONS FOR USING A BALUN - TYPES OF BALUNS - CHECK YOUR BALUN WITH AN SWR ANALYZER - MEASURING THE IMPEDANCE OF A NUMBER OF FERRITES - IMPEDANCE
More informationUser Guide. For. Model Alpha Loop (Sr)
User Guide For Model Alpha Loop (Sr) Manufactured by: Alpha Antenna 1.888.482.3249 Website: http://alphaantenna.com User Guide Version 2.5 December 27, 2017 Page 1 Table of Contents Purpose... 4 Introduction...
More informationMFJ-219/219N 440 MHz UHF SWR Analyzer TABLE OF CONTENTS
MFJ-219/219N 440 MHz UHF SWR Analyzer TABLE OF CONTENTS Introduction...2 Powering The MFJ-219/219N...3 Battery Installation...3 Operation Of The MFJ-219/219N...4 SWR and the MFJ-219/219N...4 Measuring
More informationMagnetic Loop Antenna - Multiband
Magnetic Loop Antenna - Multiband Instruction Manual Thank you for purchasing this new product small Magnetic Loop Antenna Multiband. Manual contains important information. Please read all instructions
More informationThe DBJ-1: A VHF-UHF Dual-Band J-Pole
By Edison Fong, WB6IQN The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for
More informationALWAYS ATTACH THE SAFETY ROPE TO A STABLE SUPPORT BEFORE ATTEMPTING TO ATTACH THE UNIVERSAL MOUNT TO A WINDOW FRAME OR RAIL.
MFJ-1623 Introduction The MFJ-1623 was designed to provide portable or permanent HF communications on 30 through 10 meters and VHF on 6 meters. The universal mount design allows the user to install the
More informationMast and Antennas for Field Day & Emergencies
Mast and Antennas for Field Day & Emergencies John A. Allocca, WB2LUA, July 2005 This is a 27 feet 1.5 diameter portable guyed mast with a 28 feet diameter footprint. It breaks down into four 6 feet sections
More informationA IVE-BAND, TWO-ELEMENT H QUAD
A IVE-BAND, TWO-ELEMENT H QUAD Two quad designs are described in this article, both nearly identical. One was constructed by KC6T from scratch, and the other was built by Al Doig, W6NBH, using modified
More information4/25/2012. Supplement T9. 2 Exam Questions, 2 Groups. Amateur Radio Technician Class T9A: T9A: T9A: T9A:
Amateur Radio Technician Class Element 2 Course Presentation ti ELEMENT 2 SUB-ELEMENTS Technician Licensing Class Supplement T9 Antennas, Feedlines 2 Exam Questions, 2 Groups T1 - FCC Rules, descriptions
More informationA Folding 5-Element Yagi for 144 MHz
A Folding 5-Element Yagi for 144 MHz Steve Kavanagh, VE3SMA, April 2017 1. Introduction I have found antennas which fold up quickly to take less space in the car to be useful in VHF/UHF portable operating.
More informationThe Amazing MFJ 269 Author Jack Tiley AD7FO
The Amazing MFJ 269 Author Jack Tiley AD7FO ARRL Certified Emcomm and license class Instructor, Volunteer Examiner, EWA Technical Coordinator and President of the Inland Empire VHF Club What Can be Measured?
More informationA Transmatch for Balanced or Unbalanced Lines
A Transmatch for Balanced or Unbalanced Lines Most modern transmitters are designed to operate into loads of approximately 50 Ω. Solid-state transmitters produce progressively lower output power as the
More informationUSERS MANUAL for the. FB5 Antenna. a personal non-commercial project of the Florida Boys
USERS MANUAL for the FB5 Antenna a personal non-commercial project of the Florida Boys AB4ET Dec.2003 1 The FB5 Antenna USERS MANUAL INDEX 1.0. Introduction 2.0. Design 3.0. Construction 4.0. Electrical
More informationEH-20 20m antenna. By VE3RGW
EH-20 20m antenna By VE3RGW Equivalent circuit of EH-20 antenna system. Upper cylinder Lower cylinder Phasing coil Common mode radiator Tune coil RF choke or 14MHz trap 50ohm coaxial cable 0-150pF (case
More informationCHAPTER 8 ANTENNAS 1
CHAPTER 8 ANTENNAS 1 2 Antennas A good antenna works A bad antenna is a waste of time & money Antenna systems can be very inexpensive and simple They can also be very expensive 3 Antenna Considerations
More informationModifying The Heath HA-14 For 6 Meters Greg Chartrand - W7MY 4/22/07
Introduction The Heathkit HA-14 was one of the few electron tube linear amplifiers intended for mobile use but few were purchased with the 12 volt mobile power supply. Most hams bought the HA-14 for base
More information150Hz to 1MHz magnetic field coupling to a typical shielded cable above a ground plane configuration
150Hz to 1MHz magnetic field coupling to a typical shielded cable above a ground plane configuration D. A. Weston Lowfreqcablecoupling.doc 7-9-2005 The data and information contained within this report
More informationN5PUV s 4 Band Fan Dipole Experiment. Using the New SRI (Stanford Research Institute) Method
N5PUV s 4 Band Fan Dipole Experiment Using the New SRI (Stanford Research Institute) Method Goals of Experiment Develop a Multi-band Antenna that does NOT require a tuner Build using the new, easier tuning
More informationTHE W3FF HOMEBREW BUDDIPOLE
THE W3FF HOMEBREW BUDDIPOLE A PORTABLE ANTENNA DESIGN FOR AMATEUR RADIO History of the Buddipole In January of 2000, I began experimenting with a walking portable ham station. Since then, thousands of
More informationAA-35 ZOOM. RigExpert. User s manual. Antenna and cable analyzer
AA-35 ZOOM Antenna and cable analyzer RigExpert User s manual . Table of contents Introduction Operating the AA-35 ZOOM First time use Main menu Multifunctional keys Connecting to your antenna SWR chart
More informationChapter 12: Transmission Lines. EET-223: RF Communication Circuits Walter Lara
Chapter 12: Transmission Lines EET-223: RF Communication Circuits Walter Lara Introduction A transmission line can be defined as the conductive connections between system elements that carry signal power.
More informationFrequency Converters
Pagina 1 Skip to navigation Skip to content 1: Home 2: Radio Topics 2.1: What is amateur radio? 2.2:QRPismorefun! 2.3: Stealth Amateur Radio 2.4: The Wonder Loop 2.5: Feeding the Antenna 2.6: WSPR- Distant
More informationUsers Manual. 200W HF/50MHz Band Auto Antenna Tuner. Model HC-200AT
Users Manual 200W HF/50MHz Band Auto Antenna Tuner Model HC-200AT Caution 1. Never remove or open the tuner cover while transmitting. When there is RF in the circuits of the tuner, there will be high voltage
More informationMagnetic Loop Antenna - Top Bands
Magnetic Loop Antenna - Top Bands Instruction Manual Thank you for purchasing this new product small Magnetic Loop Antenna Top Bands. Manual contains important information. Please read all instructions
More informationSome hints/tips on how to assemble nice COAX TRAPS!
Some hints/tips on how to assemble nice COAX TRAPS! Before we start to assemble our traps, here some general info as introduction : Coax traps are cheap, easy to assemble in a reproducible manner, very
More information13.56MHz Antennas APPLICATION-NOTE. OBID i-scan. Construction and tuning of 13.56MHz antennas for Reader power levels up to 1W
OBID i-scan APPLICATION-NOTE 13.56MHz Antennas Construction and tuning of 13.56MHz antennas for Reader power levels up to 1W final public (B) 2003-01-15 N20901-2e-ID-B.doc Note Copyright 2002 by FEIG ELECTRONIC
More informationArray Solutions Four Square Array Manual and User s Guide
Array Solutions Four Square Array Manual and User s Guide Array Solutions Four Square Array Pattern Steering System Congratulations! You have selected one of the finest phased array steering systems made.
More informationPNRRKIT. Portable Networked Re-Radiating Kit Technical Product Data. Features. Description. Utilizes Existing Roof Antenna
PNRRKIT Portable Networked Re-Radiating Kit Technical Product Data Features Utilizes Existing Roof Antenna Re-Radiating Amplifier with Power Supply Typical Gain 30dB Optional Mounting Kit Hardware Adjustable
More informationAD5X. The 43-Foot Vertical. Phil Salas - AD5X Phil Salas AD5X. Richardson, Texas
The 43-Foot Vertical Phil Salas - AD5X ad5x@arrl.net Outline Why a vertical? Ground Losses and Antenna Efficiency Why a 43-foot vertical? SWR-related coax and unun losses Matching Networks for 160- and
More informationIntroduction LOADING COIL COUNTERPOISE ATTACHMENT ANTENNA ATTACHMENT. Figure 1: MFJ-1625 Window/Balcony Mount Antenna
Introduction MFJ-1625 The MFJ-1625 is a 200 Watt antenna tuner that was designed to provide portable or permanent HF communications on 80 through 10 meters and VHF on 6 meters. The universal mount design
More informationYaesu 8900 Go-Pak Radio
Kaiser Permanente (KP) has dedicated a tremendous amount of resources in their Emergency Preparedness Program. Much of these resources have been dedicated to Amateur Radio equipment and radio rooms at
More informationALWAYS ATTACH THE SAFETY ROPE TO A STABLE SUPPORT BEFORE ATTEMPTING TO ATTACH THE UNIVERSAL MOUNT TO A WINDOW FRAME OR RAIL.
MFJ-1622 Introduction The MFJ-1622 Antenna was designed to provide portable or permanent HF communications on 40 through 10 meters and VHF on 6 and 2 meters. The universal mount design allows the user
More informationTechnician Licensing Class. Antennas
Technician Licensing Class Antennas Antennas A simple dipole mounted so the conductor is parallel to the Earth's surface is a horizontally polarized antenna. T9A3 Polarization is referenced to the Earth
More informationA Tri Band Antenna for 2 meters, 220 MHz, and 70cm Antenna Without Radials. By: Edison Fong (WB6IQN)
A Tri Band Antenna for 2 meters, 220 MHz, and 70cm Antenna Without Radials By: Edison Fong (WB6IQN) Twenty years ago a single band handie talkie would have been adequate for emergency use since almost
More informationThank you for purchasing the Ameritron SDA-100 Antenna
Thank you for purchasing the Ameritron SDA-100 Antenna When properly installed this antenna will provide continuous coverage of 3.5 to 30 MHz with a 6' whip, also 6.0 to 60 MHz without a whip. Installation
More informationPortable Magnetic Loop Antennas
Portable Magnetic Loop Antennas Ham Radio s Best Kept Secret By: Kurt Eversole KE9N Topics Why a Small MagneticLoop? What is a Small MagneticLoop? Build orbuy? Design Considerations Building Tips Operating
More informationBasic Wire Antennas. Part II: Loops and Verticals
Basic Wire Antennas Part II: Loops and Verticals A loop antenna is composed of a single loop of wire, greater than a half wavelength long. The loop does not have to be any particular shape. RF power can
More informationCOAXIAL TRANSMISSION LINE COMMON-MODE CURRENT
COAXIAL TRANSMISSION LINE COMMON-MODE CURRENT Introduction Coaxial transmission lines are popular for their wide frequency bandwidth and high resistance to electromagnetic interference (EMI). Coax cables
More information160- and 80-Meter Matching Networks for your 43-foot Vertical Phil Salas AD5X
160- and 80-Meter Matching Networks for your 43-foot Vertical Phil Salas AD5X 43-foot verticals have become popular as they can be self supporting, are not too obtrusive, and have higher radiation resistance
More informationFeed Line Currents for Neophytes.
Feed Line Currents for Neophytes. This paper discusses the sources of feed line currents and the methods used to control them. During the course of this paper two sources of feed line currents are discussed:
More informationUser Guide for the Alpha Loop Jr+ Antenna
User Guide for the Alpha Loop Jr+ Antenna Manufactured by: Alpha Antenna 1.888.482.3249 Website: http://alphaantenna.com User Guide Version 3.1 Page 1 Table of Contents Introduction... 3 Product Overview...
More information1.5 kw Automatic Remote Controlled Balanced Antenna Tuner. Model AT- 615B. Short Form Manual
1.5 kw Automatic Remote Controlled Balanced Antenna Tuner Model AT- 615B Short Form Manual 10/2010 Dipl.Ing. Klaus Bemmerer RF Communication Electronics Niendorf-Middeldor 11 23769 Fehmarn GERMANY Phone
More informationCP6A. 6 Band Trap Vertical 75-6m
CP6A 6 Band Trap Vertical 75-6m Instruction Sheet The CP6A is a multi-band trap-vertical antenna for HF bands, covering the 75*, 40, 20, 15, 10m & 6m amateur bands. Made from heavy duty aluminum, the CP6A
More informationTechnician License. Course
Technician License Course Technician License Course Chapter 4 Lesson Plan Module - 10 Practical Antennas The Dipole Most basic antenna The Dipole Most basic antenna The Dipole Total length is ½ wavelength
More informationDRM Receive Conversion for Yaesu FT920 HF Transceiver by Don M0DKS
1. Introduction This conversion describes the addition of the DRM receive function for a Yaesu FT920 HF Transceiver that is equipped with the FM-1 optional FM transceive board. The FT920 is a double hetrodyne
More informationRemote Automatic Antenna Tuners and the 43 Foot Vertical
PRODUCT REVIEW Remote Automatic Antenna Tuners and the 43 Foot Vertical Reviewed by Phil Salas, AD5X QST Contributing Author QST has previously reviewed in-shack and remote automatic antenna tuners designed
More informationPortable Antenna Systems
Portable Antenna Systems Dr. John A. Allocca, WB2LUA www.wb2lua.com 3/6/16 System 1 - HF / VHF / UHF Tripod VHF/UHF Antenna Dipole Mount HF Hamstick Case! 1 of! 5 Introduction This antenna configuration
More information4 Antennas as an essential part of any radio station
4 Antennas as an essential part of any radio station 4.1 Choosing an antenna Communicators quickly learn two antenna truths: Any antenna is better than no antenna. Time, effort and money invested in the
More informationMFJ-949E. tuner antenowy skrzynka antenowa. Instrukcja obsługi. importer:
Instrukcja obsługi MFJ-949E tuner antenowy skrzynka antenowa importer: PRO-FIT Centrum Radiokomunikacji InRadio ul. Puszkina 80 92-516 Łódź tel: 42 649 28 28 e-mail: biuro@inradio.pl www.inradio.pl MFJ-949E
More informationTHE HENTENNA RE-VISITED
THE HENTENNA RE-VISITED "The following article has been re-edited for the English language from the Japanese site. Minor errors and corrections have been made." The Hentenna was developed by Japanese 6
More informationCP6 6 Band Trap Vertical 80-6m
CP6 6 Band Trap Vertical 80-6m Instruction Sheet The CP6 is a multi-band trap-vertical antenna for HF bands, covering the 80*, 40, 20, 15, 10m & 6m amateur bands. Made from heavy duty aluminum, the CP6
More informationBuild a 12/17 Meter Trap Dipole Phil Salas AD5X
Build a 12/17 Meter Trap Dipole Phil Salas AD5X Introduction Why a 12/17 meter rotatable dipole? Well, many folks have verticals for the lower bands, and multi-band dipoles or beams for 20-, 15-, and 10
More information20m G4BUD Mobile Whip
This particular antenna was built specifically to take on holiday to Fuerteventura in the Canary Islands, after it was originally tested from an inland site in the UK. Amongst my first contacts using the
More informationUser Guide. For. Alpha DX Sr Antenna
User Guide For Alpha DX Sr Antenna Manufactured by: Alpha Antenna 1.888.482.3249 Website: http://alphaantenna.com Available from: Amateur Radio Store Website: https://amateurradiostore.com User Guide Version
More informationTransmission Line Signal Sampling By Don Steinbach, AE6PM
Transmission Line Signal Sampling By Don Steinbach, AE6PM When I was finalizing the mechanical layout of my remotely-operated 3-position coaxial antenna switch (Fig. 1), I wanted to include a way to bring
More information20 meter bandstop filter notes
1 Introduction 20 meter bandstop filter notes Kevin E. Schmidt, W9CF 6510 S. Roosevelt St. Tempe, AZ 85283 USA A shorted half-wavelength stub cut for 20 meters acts as a bandstop filter for 10 and 20 meters,
More informationLow Pass Filter (rev 5) for single and 2-Pallet HF Amplifiers The filter sections on this board differ from the web article, and offer some
The filter sections on this board differ from the web article, and offer some improvement in performance, including raising the maximum power handling capacity. The most significant changes were to the
More informationMFJ-969 Versa Tuner II Instruction Manual
MFJ-969 Versa Tuner II Instruction Manual General Information The MFJ-969 is a 300 watt RF output power antenna tuner that will match any transmitter or transceiver to virtually any antenna. Peak or average
More informationIC-781: Installing the Inrad Roofing Filter Mod
IC-781: Installing the Inrad Roofing Filter Mod The Icom IC-781 roofing filter mod consists of a 6-pole, 4 to 5 khz wide filter followed by a high dynamic range, feedback amplifier. The amplifier provides
More informationTen-Tec Orion Sub Receiver VHF Filter Modification Prepared by Rick Williams, VE7TK
Ten-Tec Orion Sub Receiver VHF Filter Modification Prepared by Rick Williams, VE7TK (Note: Those undertaking this modification do so at their own risk. The procedures outline a method of installing an
More informationSWR myths and mysteries.
SWR myths and mysteries. By Andrew Barron ZL3DW September 2012 This article will explain some of the often misunderstood facts about antenna SWR at HF and uncover some popular misconceptions. The questions
More informationHow to use your antenna tuner.
How to use your antenna tuner. There's more to it than what is in your manual or on most how to do it websites! http://www.arrl.org/tis/info/ant-tuner-op.html Here is a neat site with a "T" network simulator.
More informationTransmission Lines As Impedance Transformers
Transmission Lines As Impedance Transformers Bill Leonard N0CU 285 TechConnect Radio Club 2017 TechFest Topics Review impedance basics Review Smith chart basics Demonstrate how antenna analyzers display
More informationOne I had narrowed the options down, I installed some wire and started testing.
Loft & Attic antennas for restricted spaces - M. Ehrenfried G8JNJ I ve recently been looking at designs for an efficient antenna that would fit in a loft. I hoped to find something that would work on with
More informationPortable Vertical Antenna for 75m & 40m
Portable Vertical Antenna for 75m & 40m BOXBORO August 2012 Jacques VE2AZX Web: ve2azx.net 1 Objectives 1- Portable Antenna for 75m et 40m 2- Low radiation angle for DX 3- Efficient 4- Easy to install.
More informationFigure 1 Parameters of the Antenna UA6AGW V.40.0
Aleksandr Grachev, UA6AGW Credit Line: CQ-QRP # 39, pp.: 22-27. In the summer 2011, UA6AGW persistently have been working on improvement of his antennas (see Reference 1). Article below is just a digest
More informationARNSW Balun Day. Balun construction
ARNSW Balun Day Balun construction Typical Baluns All built from locally available components. Balun uses Most baluns are used to match the 50Ω output of a transceiver to an antenna. A centre fed dipole
More informationUnderstanding and Optimizing Electromagnetic Compatibility in Switchmode Power Supplies
Understanding and Optimizing Electromagnetic Compatibility in Switchmode Power Supplies 1 Definitions EMI = Electro Magnetic Interference EMC = Electro Magnetic Compatibility (No EMI) Three Components
More informationPortable HF Magnetic Loop Antenna System Model HF-315
Portable HF Magnetic Loop Antenna System Model HF-315 Contents: Introduction... 2 Safety information... 3 Warranty information... 4 Assembling and using your antenna... 5 Illustrations... 6 Specifications...
More informationTS-870: Installing the Inrad Roofing Filter Mod
TS-870: Installing the Inrad Roofing Filter Mod The TS-870 roofing filter mod consists of a 6 pole, 4 to 5 khz wide filter followed by a high dynamic range feedback amplifier. The amplifier provides enough
More information