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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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ANTENNA TUNER x ANTENNA COUPLER x BALUN x COUPLER (ANTENNA) x MATCHBOX (ANTENNA) x TRANSMATCH (ANTENNA) x TUNER (ANTENNA) xx ANTENNA xx IMPEDANCE MATCHER BCL-SWL antenna tuner is designed to cover the broadcast and shortwave band. A coil is tapped at 9 different points to allow the operator to change the inductance of the coil to match the antenna to the frequency being received. More on the versatile all-band antenna tuner featured in the Aug. 1978 issue of CQ magazine. Mini-antenna tuner and SWR meter is used with an Atlas transceiver for all-band operation. Simple antenna tuner is used to feed an end-fed wire about 45 feet long, from a 40 meter 15 watt transmitter. What's a stub? Using a stub to match an antenna to its source. Description of the Omega match which is an improved version of the Gamma match. All you need to know about the device known as a transmatch, antenna coupler, matchbox, or tuner. Lo-z to Hi-z antenna coupler circuit matches the output impedance from solid state transmitters (50 ohms) to 300 ohm antennas. Schematic for a bandpass transmatch type of antenna coupling circuit. Antenna null meter replaces an s.w.r. bridge, coax switch, and dummy load. It provides a quicker means of adjusting an antenna tuner. Simple-to-build antenna tuner can be dimensioned to match any reasonable antenna load (10-1000 watt) on any or all h.f. bands. Build your own antenna bridge. Uses a 6T4 oscillator tube. Requires no plug-in coils or Smith Charts to use. A trio of antenna tuners. (1) A multiband manual tuner. (2) The multiband T tuner. (3) Mini-powerhouse tuner. To use or not to use a Transmatch (antenna tuner). One more discussion of a popular subject. Includes tips on constructing a junk-box Transmatch. The unexpurgated Transmatch. Part 1. Questions and answers on whether or not to use a Transmatch. The unexpurgated Transmatch. Part 2. Breadboarding your own antenna tuner. The unexpurgated Transmatch. Part 3. Conclusion. More questions and answers on whether or not one should use a Transmatch. More easy-to-build antenna tuners. Double-L antenna tuner will match a great range of load impedances. How to build two simple antenna tuners. (1) Simple coil/capacitor tuner for use with a long-wire antenna. (2) Tuner with two capacitors and a 4 to 1 balun. Some general do's and don'ts regarding the practical use of antenna tuners. Coax line stretcher. This "poor man's antenna tuner" consists of a large coffee can with eight interconnected loops of coax cable coiled inside. Using switches, from 2-ft. up to 70-ft. of additional coax can be easily inserted into the feedline to "tune" your antenna. Est. cost: $25. Build a universal phaser for low-frequency directive arrays. Used to phase two matched antennas for more than one band. The suitcase antenna tuner. A unique 100 watt level antenna tuner small enough to travel with you. How to adjust a transmatch. Part 1. How to adjust a transmatch. Part 2. How to build a remotely controlled bridge for impedance matching. Tuning antennas without a transceiver. Requires the use of a frequency counter and SWR analyzer. Combine an RX noise bridge and this simple control box to adjust a transmatch silently without creating QRM (man-made interference). Balun/Balun. Constructing a parallel balun assembly for use as a center insulator/transformer for a 20/12 meter multiple dipole antenna system. How to build a multi-tap unun (unbalanced to unbalanced) antenna matcher. Unbalanced-to-unbalanced matching transformers (unun). How to understand them and how to make your own. Practical aspects of this useful transformer and an introduction to trifilar and quadrifilar designs. Part 1. The 2:1 unun. Antenna tuners. (1) Designed for 100 watt output level and mimics an MFJ product. (2) Designed for the 1 KW+ output level and also utilizes a T network with two variable-inductor arms. Build a practical and inexpensive sleeve balun. Unbalanced-to-unbalanced matching transformers (unun). Part 2. The 1.5:1 and 1.33:1 ununs. How to build a small ATU (antenna tuning unit or Transmatch) that will permit a Kenwood TS-140 to operate with random-length wire antennas from 160 through 20 meters. Will handle up to 150 watts and has a built-in SWR bridge. Unbalanced-to-unbalanced matching transformers (unun). Part 3. The 4:1 unun. Unbalanced-to-unbalanced matching transformers (unun). Part 4. Dual-ratio ununs. Unbalanced-to-unbalanced matching transformers (unun). Part 5. A multimatch unun. How to build a Transmatch for 2 meters. A balun essay. History, theory and construction of 6 devices for matching 50 ohm coaxial cable to a balanced load of 50, 75, 100, 200, 300, or 450 ohms. Understanding the role of the SWR meter in matching an antenna to a transmitter. Unbalanced-to-unbalanced matching transformers (unun). Part 6. The ultimate multimatch unun. Fourteen variations on matching 50 ohm cable. The Z-match antenna tuning unit (ATU). Baluns for antenna tuners. An in-depth look at how and why they work. The air-core coax balun. Includes (1) 1:1 coax balun, (2) a practical coax balun for 7 to 30 MHz, (3) the 4:1 coax balun, and (4) balun construction. Ununs for the 160 meter Beverage antenna. A simple five-band (14, 18, 21, 24, and 28 MHz) antenna tuner. 4:1 baluns for antenna tuners. A look at new designs, history, literature, applications for various 4:1 designs, and a brief overview of transmission line transformers. More on the 1:1 balun. (1) When to use a balun. (2) Highlights of significant articles on 1:1 baluns in the professional and amateur literature. A coaxial offset-feed method for Yagi antennas. Simple antenna matching technique for achieving the full inherent bandwidth of Yagi antennas. Some antenna tuner tips. Looks at shielding, power ratings, 160 meter operation, 10 and 15 meter operation, construction tips, etc. The mechanics of coaxial antenna traps. Includes construction details and hookup information. Build a switchable impedance matching transformer for various HF mobile and base-station antennas. VHF transmatch design. Examples of VHF antenna-matching networks are provided, including a practical circuit for a 6- and 2-meter antenna tuner with built-in SWR indicator. Antenna tuners and more. An overview of factors related to antennas and antenna systems that is intended to provide an improved in-depth understanding of this subject. Part 1. Antenna tuners and more. Part 2. QRP antenna cheapware. Small QRP antenna is built from a plastic 35mm film container, button, wire, capacitor, and inductor. Other uses for 35mm film containers include a low-power balun, dipole antenna center support, and open wire spreaders. Tiny Tuner. Antenna tuner for low-power (QRP) amateur radio fits in the palm of your hand and uses an L-type filter network to match almost any wire antenna. A 250 watt antenna tuner. SWL antenna tuner. Antenna tuner which will match a long-wire antenna (40 ft., up) to any 10- through 80-meter transmitter. Tuner includes an RF meter. A remote-controlled vertical antenna tuner covering 80- through 10-meters. Circuit uses high-frequency op-amp to distribute broadcast-band signals from a single long-wire antenna to several receivers. Antenna systems for SWLs. Several styles of shortwave antennas plus a simple SWL antenna tuner. Using antenna tuners. Why they are needed and what they do. When and how to use an antenna tuner. The antenna noise bridge: a forgotten tool. What it is and how to use it to adjust antennas. Using an antenna bridge to adjust a single-wire indoor antenna. Setting up a high-frequency 2 MHz to 30 MHz remote-mounted antenna coupler. Some tips. Random-wire ham tuner for SWL indoor reception. Tips on installing and using an antenna tuner with a short indoor antenna. Making the best of a mobile SWL antenna. (1) Tips on installing and using an inexpensive antenna bridge (tuner). (2) Tips on bumper-mount antennas on a pickup truck. Tuner and untuned pre-amp help reception on a world band radio receiver (100 kHz to 30 MHz). Tips on installing and using an antenna tuner and an untuned antenna pre-amplifier. Includes method for using a long loop antenna to improve results on low frequencies. Antenna tuners. How they work and how to determine if you need one or not. Using remote-mounted automatic antenna couplers (ATUs) in medium frequency H.F. systems. How to prevent arc-over from the high voltages and amperages that are present. Antenna tuners. What they do and how to determine if you need one for your ham antenna. Technician band antenna coupler. Secure optimum coax line match on either 6- or 2-meters. Use of PI-selection coupler and an antenna of 30 to 100 ft. and you can tune from 500 to 6,800 KHz. Est. cost: $6. Simple Wheatstone bridge and a signal source used to tune SWL antenna system. Antenna tuner for SWL's. Low-cost front end increases signal strength and improves sensitivity. Antenna tuner (transmatch) circuit which takes an antenna of unknown impedance and matches it to the input impedance of the receiver (or transmitter) to which it is connected. Two circuits shown. Balun transformers. What they are and why they are needed when connecting a radio transmitter to an antenna. Tiny Tuner. Build a small antenna tuner for use with low-power (QRP) amateur-radio equipment. Need to use a low-pass filter between a ham transmitter and the antenna tuning unit is explained. How to make BALUN (BALanced UNbalanced), matching, and other broadband radio-frequency transformers. Used to match the impedance of antennas to the 50-ohm system impedance found on most receivers and transmitters. A simple antenna tuner circuit for ham radio. Baluns and other broadband transformers for impedance matching of ham radio antennas. All about VLF (very low frequency) antennas. Part 4. Build a passive antenna tuner for VLF-LF. How to tune a receiving antenna to get the best signal strength possible. How to use the "Tuner-Tuner", a noise bridge that's specifically designed for pre-adjusting the antenna tuner before the transmitter is ever turned on (keyed). Antenna tuners for receivers. Est. cost: $7. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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