Practical Wireless №1 2019.pdf

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Antennas: two compact designs for HF portable
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Making Waves: backscatter propagation
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JANUARY 2019
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Contents
Practical Wireless January 2019
●
Volume 95
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Number 1
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Issue 1340
On Sale
13th
Decembe
r
2018
42
36 HF Highlights
12
6
7
Keylines
Don
re ects on QRP versus QRO,
amateur radio insurance and QSLing.
Steve Telenius-Lowe PJ4DX
has lots
of news about recent DXpedition
operations, while pondering whether the
New Year will see the start of the new
sunspot cycle.
44
42 Kits & Modules
Geoff Theasby G8BMI
has an antenna tuner
kit from China – a challenge to build but
maybe worth a punt when it costs less
than £9?
64 Starting Over
Lee Aldridge G4EJB
continues his
re-entry to the hobby by turning to
more construction and some antenna
experimentation.
News
PW’s
monthly roundup of news from the
UK and internationally, including new
products, club news and recent events.
12 Revisiting Yaesu’s System Fusion
In the rst of a short series of articles,
Tim Kirby G4VXE
brings readers up-to-
date with developments in Yaesu’s
System Fusion.
43 Radio Bookstore
Your one-stop shop for hobby-related
titles, biographies, reference titles,
historical accounts, technical advice and
successful building projects.
66 Exploring New Fields
Joe Chester MW1MWD
talks about his
choice to operate QRP and his research
into what this implies.
16 Valve & Vintage
Michael Marinaro WN1M
tells the story of
the heyday of the rhombic antenna in
amateur radio service, including tales
of the legendary W6GRL and W6AM
antenna farms.
44 Carrying on the Practical Way
Chris Bearman
has an unusual but
straightforward project for a two-valve
VHF super-regenerative receiver.
68 Making Waves
Steve White G3ZVW
looks at an
uncommon mode of signal propagation,
Backscatter.
49 Doing it by Design
Ron Taylor G4GXO
describes a Spectrum
Reversal Module for Opposite Sideband
Operation.
70 Readers’ Letters
Another busy postbag includes letters
on what the hobby actually is, problems
of interference and spectrum pollution,
feedback on recent columns and more.
24 To QSL or Not to QSL?
Steve Telenius-Lowe PJ4DX
offers his
personal take on the subject of QSLing.
54 What Next
Colin Redwood G6MXL
recommends some
on-air activities for the Christmas/New
Year break.
74 Book Review
Don G3XTT
takes a look at another new
publication from the RSGB,
Power
Supplies Explained.
27 Subscriptions
Your guide to taking out a regular
subscription to
PW
and/or
RadioUser.
28 The World of VHF
Tim Kirby G4VXE
has plenty of news but
the highlights are from the excellent 2m
tropo openings during October.
58 Short HF antennas for Portable
Operation
Dr John Redgate G4ANS
offers two
compact antennas suitable for low-
power portable operation.
75 Rallies
Locate a rally or event near you; we have
our usual comprehensive list.
34 Amateur Radio Insurance
Insurance broker
Julian Dent M6NNQ
offers his top tips when making an
insurance claim.
60 Data Modes
Mike Richards G4WNC
has the latest on
WSJT-X, an aside on digital beacons and
some insights into the future of SDR.
Copyright © Warners Group Publications plc 2019. Copyright in all drawings, logos, photographs and articles published in Practical Wireless is fully protected
and reproduction in whole or part is expressly forbidden. All reasonable precautions are taken by Practical Wireless to ensure that the advice and data given to
our readers are reliable. We cannot however guarantee it and we cannot accept legal responsibility for it. Prices are those current as we go to press. Published on
the second Thursday of each month by Warners Group Publications plc Printed in England by Warners Midlands plc. Tel: 01778 395100. Distributed by Warners
Distribution, West Street, Bourne, Lincs, PE10 9PH. Tel: 01778 391000, Web: www.warnersgroup.co.uk
Practical Wireless is sold subject to the following conditions, namely that it shall not, without written consent of the publishers rst having been given, be lent,
re-sold, hired out or otherwise disposed of by way of trade at more than the recommended selling price shown on the cover, and that it shall not be lent, re-sold,
hired out or otherwise disposed of in a mutilated condition or in any unauthorised cover by way of Trade, or af xed to or as part of any publication or advertising,
literary or pictorial matter whatsoever.
January 2019
Practical Wireless
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