an argus specialist publication march 1989 £1.40

60 Pages·2017·8.11 MB·English

AN ARGUS SPECIALIST PUBLICATION MARCH 1989 £1.40
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CONTENTS
i 1
VOLUME 7 IMO 3 MARCH 1989
Editor
Helen Armstrong BA
Technical Editor
Andrew Armstrong BSc CEng G3YZW
Reviews Consultant
Chris Lorek BSc (ENG) G4HCL
Technical Illustrator
Jerry Fowler
Advertisement Manager REGULAR COLUMNS
Selina Gayle
Classified Sales Executive
Nigel Fitzhenry RADIO TODAY 6
More morse and Howes kits?
Published by:
Argus Specialist READERS' LETTERS 12
Publications Ltd Bonzai becomes Marconi!
Distributed by
RADIO TOMORROW ! 50
SM Distribution Ltd
Meet on the beat
Printed & bound by:
Chesham Press, Chesham, Bucks
Design by
ASP Design Studio
Editorial and Advertising
address: FEATURES
Ham Radio Today, ASP Ltd
1 Golden Square, London W1R SAB
Tel: [phone] MORSE FORUM 14
(please mark your letter for the The advantages of CW over that modern stuff
appropriate department!
LEICESTER AMATEUR RADIO SHOW REPORT 17
Subscriptions and back issues; More cash well spent!
Ham Radio Today Subscription Dept.
Infonet Ltd, 5 River Park Estate, QRZ 42
Berkhamsted, Herts HP4 1HL Vietnam and Maly Vysotsky are up for grabs
Tel: [phone]
Subscription rates:
UK £16.80, Europe £21.30,
Middle East £21.30, USA $32,00
Far East £23.20, Rest of World £21.80
Airmail rates on request. REVIEWS
USA Subscription Agent:
Wise Owl Worldwide Publications,
4314 West 238th Street, YAESU FT767 UPDATE 26
Torrance CA90505 The box everyone will be talking about soon
DIAMOND SWR AND PEP METERS 27
ARGUS Member of the
PRESS Audit Bureau ABC Accurate and well up to standard
GROUP of Circulation
MFJ MULTIMODE DATA CONTROLLER 32
Ham Radio Today is normally published
on the first Friday in the month preceding A mixed menu, but excellent value
cover date. The contents of this
publication including all articles, designs,
plans, drawings and programs and all
copyright and other intellectual property
rights therein belong to Argus Specialist
Publications Limited. Ail rights conferred
by the Law of Copyright and other CONSTRUCTION
intellectual property rights and by virtue
of international copyright conventions are
specifically reserved to Argus Specialist PYE EURO PA CONVERSION 20
Publications Limited and any reproduc-
tion requires the prior consent of the Employ an ex-PMR to look after your Packet
Company © 1989 Argus Specialist
Publications Ltd. TUNING BACK THE CLOCK Part 2 37
All reasonable care is taken in the Our 'antique' valve transceiver concluded
preparation of the magazine contents, but
the publishers cannot be held legally RECEIVER FRONT END PROTECTOR 46
responsible for errors. Where mistakes do
occur, a correction will normally be Keep out unwanted watts
published as soon as possible afterwards.
All prices and data contained in
advertisements are accepted by us in good
faith as correct at the time of going to
press. Neither the advertisers nor the HAM RADIO TODAY SUBSCRIPTION FORM 26
publishers can be held responsible, FREE READERS ADVERTISEMENTS 52
however, for any variations affecting price
or availability which may occur after the CLASSIFIED ADVERTISEMENTS 56
publication has closed for press. ADVERTISERS'INDEX 58
HAM RADIO TODAY MARCH 1989 please mention HRT when replying to advertisements 3
TX-3 RTTY/CW/ASCIITRANSCEIVE
The high performance, low cost system GAREX ELECTRONICS
Split-screen, type-ahead operation, receive screen
WEATHER SATELLITE SYSTEMS
unwrap, 24 large memories, clock, review store,
☆ ☆NEW-fr-&-frNEW-&-fr-&NEW-£r^
callsign capture, RTTY auto CR/LF, CW software
SPECTACULAR NEW ATARI ANIMATED
filtering and much more. Needs interface or TU. BBC-
SYSTEM
B/Master and CBI\/I64tape £20, disc £22. Spectrum Garex are proud to announce that they have been appointed sole UK
dealer for this incredible new Timestep product. Following on from
tape £35, +3 disc £37 inc. adaptor board (needs Timestep's phenomenal success in the education market a special low
interface/TU also). cost Atari ST version of their animation system is now available. Simply
plug in your existing receiver to view amazing pictures. For the ultimate,
For VIC 20 we have our RTTY/CW transceive add a Mefeosat receiver for unbelievably smooth 15 frame animation that
program. Tape £20. is completely automatic once set up. Just watch the clouds roll by! New
pictures are added twice an hour if required, the oldest being discarded
automatically. This sophisticated package will run on any Atari ST-1040
RX-4 RTTY/CW/SSTV/AMTOR and compatible colour monitor, comes complete with all software and
colour-keyed Atari interface unit. £299.00
RECEIVE Optional 16 grey scale adaptor for colour monitor £24.95
This is still a best-selling program and it's easy to see For those who would like a one-stop-shop, we offer the complete package
why. Superb performance on 4 modes, switch of a ready-to-run system: Meteostat dish and receiver, Atari interface unit,
grey scale adaptor, 14in colour monitor, Atari ST-1040 computer, software
modes at a keypress to catch all the action. Text and (including demo disc)
AND, OF COURSE, ALL PLUGS AND CABLES
picture store with dump to screen, printer or On your doorstep £1,695.00
tape/disc. An essential piece of software fortrawling
COMPACT FRAME STORE SYSTEM
the bands. Needs interface. BBC-B Master, CBM64 The basic MICROWAVE METEOSAT system, no complications, a
complete plug in and go package requires no computer, no software, and
tape £25, disc £27. VIC20 tape £25. SPECTRUM can be up and running, including dish alignment within ten minutes.
tape £40, +3 disc £42 in. adaptor board (needs Nothing more to buy: dish, microwave receiver, frame store, 12in b/w
monitor AND ALL PLUGS AND CABLES. Designed by Timestep,
interface also). The SPECTRUM software-only supplied by Garex £995.95
version (inputto EAR socket) is still available £25, +3
137MHz VHF SATELLITE ACCESSORIES
disc £27. 137MHz active antenna + 35m cable 74.75
137MHz 10-channel receiver £155.25
TIF1 INTERFACE Perfect for TX3 and RX4, it has SAE for full details and prices of other 'separates'
2-stage RTTY and CW filters and computer noise ★ ★★★★★★ ★★★★★★ ★★★★★■*■
reduction for excellent reception. Transmit outputs GAREX VHF RECEIVERS
The celebrated Timothy Edwards designs now owned and manufactured
for MIC, PTT and KEY. Kit £20 (assembled PCB + by GAREX.
Cables, Connectors) or ready-made £40, boxed with A A simple but versatile design capable of covering spot frequencies
in the range 25-200MHZ.
all connections. Extra MIC leads for extra rigs £3 ☆ Excellent sensitivity (typically 0.4uV for 12dB SINAD).
each. State rig(s). Interfaceonly available with TX-3 ☆ Double superhet (10.7MHz and 455kHz IFs).
A Choice of IF bandwidths from 'W-SAT to '12.5kHz' PMR standards.
of RX-4 software. ☆ The basic receiver is single channel crystal controlled.
it Multichannel option.
WORLD AND UK/EUROPE LOCATOR Maps, great ☆ 2 watt audio output stage having a low quiescent current.
it Size: 153x33x13mm
circles, distances, bearings, contest scores. it Requires 10-14v DC supply.
Lat/Long, locators. NGR, hundreds of placenames. PRICES:
Stock Versions: (fully assembled, aligned and tested boards) 6m, 4m,
BBC-B/M ASTER, ELECTRON ONLY tape £10. 2m and Weather Sat: £49.95 I
Complete cased version and special options: details and prices on
LOCATOR Distances, bearings, contest scores. request. Crystals can be supplied if required; most popular 2-metre
Lat/Long, Locators. SPECTRUM, CBM64, VIC20, frequencies and the currently active weather satellites are readily
available. Crystal prices on request.
tape £7. it Mains power supply module: £15.50
And forthe BBC-B/Master, SPECTRUM, ELECTRON, GAREX VHF PREAMPLIFIERS
it Compact size; 34x9x15m
CBM64, VIC20. Up to 26dB gain
it Can be made for any frequency in the range 40-200MHz
MORSE TUTOR 1-40 wpm. Learn by ear, practice ☆ 3dB bandwidth ±3MHz (at 145MHz)
using random letters, punctuation, words. 40 plain ☆ Uses BF981 (0.7dB NF at 200MHz)
it Input and output impedance 50 ohms
language texts supplied or type your own. With it 1dB compression: +10dBm
☆ Saturated output; +15dBm
learning guide, tape £6.
☆ Supply voltage 8-17v DC at 5-10mA
Stock Versions: (fully assembled, aligned and tested boards) 6m, 4m,
LOGBOOK Date, band, mode, call and remarks.
2m and Weather Sat; £11.45
Instant callsearch. Log printout. Tape £8. Other versions: prices and details on request.
RAE MATHS Unlimited practice and testing for the ☆ HIGH PERFORMANCE ☆
2 METRE PRE—AMPLIFIER
exam calculations. Tape £9.
☆ 3 Band-pass stages for improved selectivity
☆ 16dB gain with IdB NF
AIIBBCandCBM64programsare available on DISC it Switches 35 watts
at £2 extra. it RF switched (fail-safe action): gas-filled relays
Assembled, tested pcb £42.50
NEW!! PEP BOARD Converts any RF power meter to Boxed version £49,95
Gas-filled relays as used in pre-amp 4.95
read pep. Assembled and tested pcb + mounting kit
Main Distributors for
and instructions £12.
REVCO ELECTRONICS LTD.
PricesincludeVATandP&P, IstClassinland,airmail Prices include UK P&P and 15% VAT
Ask for details of our Interest Free Credit
overseas, normally by return. Eire, C.I., BFPO deduct
13%.
GAREX ELECTRONICS
HARROW HOUSE, AKEMAN STREET, TRING HP23 6AA
technical software (HRT) TEL: TRING (044282) 8580
Fron, Upper Llandwrog, Caernarfon LL54 7RF. and CHEDDINGTON [phone]
Tel; 0286 881886 Callers by appointment only
I
scooooooooooooooooooooooooooooooeoooi
please mention HRT when replying to advertisements HAM RADIO TODAY MARCH 1989
o^s
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asftj
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:>0- ''i-WMI
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VERSATOWER RANGE
Sedions Retracted Eitended
No. U. V
KniSeiies 3 « SO
v,\e VO^''
A range of telescopic towers in "E"Senes 3 U 13.7
static and mobile models from Slaniaid ^£3 \Js^ .Vlev
7 5 to 36 metres with tilt-over Series 13420 2 7J 120 w:, ^es^V^elacove^6e tor
facility enabling all maintenance nsr CW^
to be at ground level. ^SpV V .. c\U^
^ce've.o*^e^We>e^na^o: ;.^
Designed in accordance with CP3 ,\rr%'
Chapter V: part ? 1972 for a ^qOOO^ • w^Vj • r\ssV' \cS'
minimum wind speed of 85 mph \C^ vc
in conditions of maximum
exposure and specified by Retracted - Extended heights tiled, ncniralonly
professionals world-wide where
Eitended Height Ground level to centre ol Arraj. -e^-rUO=
hostile envirdnments demand the
^ -.aDO^ .rV- , .^d'^
ultimate in design, quality and
reliability d\recV
Exposuie of location - raanfam rind speed. AC*1
Hole models niaiked 'supplied ritb cbligalory
Guys
or^a^ ''
Ah models - choice of ground mounting. C
technical Staff aiailable to advise on model
selection.
/A
-a^e.£ o\ .991
IC^000 M^fV,0°e
A 00°
A\ililaI)lo t roni
Strumech Versatower Limited.
Portland House, Coppice Side,
Brownhills, Walsail, West Midlands
WS8 7EX, England.
Telephone [phone] M
Telex: 335243 SELG.
Fax (0543T3610S0
¥" v z It ■'
w, ajy 5 _ ^ ( r- »'i&mMt' Q'Mi
*' t i 'r '
• / .• 5 '
HAM RADIO TODAY MARCH 1989 please mention HRT when replying to advertisements
5
r^/A\p)n(5i
Z3i
□ O /A
ATs for AR
Andrews Computer Services are offering a series of
AT/XT compatible computer systems configured for amateur
radio use. ACS also have an Eprom upgrade, the PMS
(personal message system), for Pac-Comm TIN Y-2, TNC-200
and TNC-220 packet radio controllers.
The proffered computer systems comprise in outline:
ACS AT 268 compatible: 101 key keyboard, 640K zero
wait state ram, monochrome monitor, 80286 processor,
20Mbyte hard disk 65ms, Phoenix BIOS, 1.2Mbyte, 5.25in domain amateur radio-related disks available for the computers
floppy drive, two RS222 and two parallel ports. 8 expansion at the time of order. These include programs for packet radio.
slots, clock calendar, 200W power supply. £895 plus carriage SSTV, RTTY, Morse code, locator programs and more.
and VAT. The Pac-comm PMS eprom allows the packet radio
ACT AT 80386 compatible Desktop/Tower system: as controllers as specified for its use to support standard packet
above, but with 80386 20MHz main board, 32-bit bus functions, while simultaneously allowing messages to be
structure, 1Mbyte ram, 250W power supply. Recommended entered or read over the air. About 15K of battery-backed ram
for network fileserving, CAD, real-time control environments, is allocated for message storage.
desktop publishing and similar tasks. £1650 plus VAT and The PMS eprom for the TNC-200 can also be used to
carriage. upgrade the AEA PK80 and MFJ 1270/1274 controllers with
ACS XT 8088 compatible 20Mbyte hard disk, 360K 5.25 32K of ram.
floppy disk drive, 640K Ram, two serial, two parellel ports, The Pac-Comm PMS costs £12.50 (£7.50 if you supply
multi in/out card, monochrome monitor, latest version of the your own 27256 eprom).
Phoenix Bios, 4.77/10MHz switchable main board. £695 plus Further details on all counts from Andrews Computer
VAT and carriage. Services Ltd, 6 Ash Hill Close. Bushey Heath, Herts WD2
There is, says MD Paul Andrews G6MNJ, a set of public 1BW. Tel: [phone].
Howe About Kits AT160 80/160M phone and CW transmitter. This
C M Howes Communications have sent out their AM, DSB and CW dual band transmitter has been added
1989 Radio Kit Catalogue with five new transmitter, re- to the list to complement Howes' simple CW trans-
ceiver and accessory kits to further extend their range mitters with a phone transmitter, following the tradition
of nearly two dozen kits in the field. Howes kits include of the old top band/80m AM valve rigs, but using solid
a glass fibre PCB, all board-mounted components, parts state technology. Pot control gives continuous carrier
list and instructions and circuit and wiring, as well as adjustment between full carrier and —49dB DSB, and
other essential parts. Off-board components and casing transmitter power from around .5W to 10W PEP. Kit
are usually available separately. The new kits are: £34.90, assembled board £53.90.
MBRX Marine Band Receiver. This is a communi- MA4 Microphone Amplifier. This is an active-filter
cations receiver covering the marine band from 1.6MHz microphone amplifier designed to complement the
to 3.95MHz in two ranges, including ship-to-shore, AT160 and similar units. Kits £5.60, assembled board
coastal stations, the international distress frequency £9.90.
and the 80m and 160m amateur bands. Some of the AA2 Active Antenna Amplifier. "Designed to
features are a three position RF attenuator, selectable enable you to convert a few feet of wire or metal rod into
fast or slow AGC and a stable fet VFO with fine tune an 'active antenna' capable of receiving as many signals
control. Optional filters and signal monitor kits can be as much longer passive wires," say Howes. Designed
added. Suitable tuning capacitors are available while to be mounted near the receiver or remotely in an attic
stocks last. £29.90 kit, assembled board £44.90. , or mast, and to mount in a standard drainpipe length for
DcRx54 HF Air Band Receiver. This is the latest weatherproofing, the amp has single wire and dipole in-
version of Howes' shortwave SSB/CW receiver, popular puts and a frequency range from long wave to 30MHz.
with newcomers and QRP users. The DcRx54 covers Not for transmitting. Kit £7.50, assembled board
the HF airband from 5.45MHz to 5.75MHz. It comes £11.50.
with ready-wound coils. "Do not be put off by the low For more information contact C M Howes at Eydon,
price, this set performs well and is capable of world Daventry, Northants NN11 6PT. Tel. [phone]. Inland
wide reception," say Howes. Kit £15.60, assembled postage £1.00 on total order, £2.00 airmail outside
board £21.50. Europe.
6 please mention HRT when replying to advertisements HAM RADIO TODAY MARCH 1989
Morse Application
Where There's Morse
for Blind Workers
There's Chrome . . .
A word processor for the visually handicapped
Gordon Crowhurst G4ZPY of G4ZPY Paddle Keys
which employs morse code as the aural feedback has
is continuing his search for the perfect paddle key by
been produced by Gravatom Technology Ltd. (GTL) or
upgrading his already good keys in a number of ways.
Fareham.
G4ZPY told Ham Radio Today that his Pump Key
Apparently based in an Atari ST520 (GTL stress
now has 40 threads to the inch in its adjustable contact,
that the rig simply works like an electronic typewriter
and the return spring is now adjustable down to zero
and that no computing experience is needed), Sound-
tension to suit operators with a very light touch.
writer uses five redefined keys: a dah key, a dit key, a
Gordon feels that the Single Paddle Key cannot be
command key and two punctuation keys. The package
improved upon, but he is asking for suggestions from
includes a printer, program discs, taped and printed in-
CWers who feel otherwise.
structions and connecting cables. It is designed on the
There is also a MK2 Twin Paddle with several slight
one hand to function as an office wordprocessor/com-
improvements over the MK1 model.
puter {a keyboard cover protects the rest of the key-
Gordon has now extended his range of variations
board when in Soundwriter mode) and on the other
to a total of 65. New to the range is a Nickel Plated Pump
hand can be connected to a domestic TV as a monitor,
Key mounted on a chrome plated brass plate, which is
and set up, say GTL, by a visually handicapped person
in its turn mounted on real mahogany, priced £42.95
without assistance, thanks to the cassette of recorded
and "a real beauty", according to Gordon. The new
instructions.
nickel Plated Single Paddle Key Grande Luxe is mounted
GTL's trials have indicated that visually handi-
on a chrome plated steel base and priced at £68.95, and
capped users are able to read and write morse after a
the Nickel Plated Twin Paddle MK2 Key Grande Luxe is
few hours, and improve rapidly with practice.
also on a chromed steel base, and priced at £82.95.
Soundwriter costs £800 and it is hoped that it will
Gordon is adamant that he will even make a gold
help visually handicapped people to word-process more
plated key for you — if you have a bottomless pocket.
easily and effectively without having to master conven-
Unfortunately, due to the rising cost of materials
tional keyboard skills or braille. Because Soundwriter
and manufacture, the price of the Mk2 Twin Paddle Key
itself is a software package, the program can be up-
has risen from £57.50, and the price of most other keys
dated easily, and the computer redefined for normal
will probably have risen somewhat by the time you read
wordprocessing.
this.
GTL, Portsdown House, West St., Fareham P016
For the non-CWer, or anyone taking a break, Gordon
OEF. Tel. [phone].
is also producing a range of desk pen holders mounted
on Lakeland Stone and Marble, and 6in quartz clocks.
Gordon and Brenda wish all our readers a pros-
perous New Year. For more information about any of his
products, contact Gordon Crowhurst G4ZPY at 41 Mill
Dam Lane, Burscough, Ormskirk, Lanes L40 7TG, UK.
Tel. [phone].
n
^ I I V
o
Repeater Rally
The 1989 Cambridgeshire Repeater Group Junk
Sale Rally Extravaganza (add your own epithets at will)
starts at 10.30am on Sunday 19 March at the Philips
RCS (Pye Telecom) Canteen, St. Andrews Rd., Cam-
bridge. The all-day show will feature trade stands, a
'nearly new' bring and buy stall, and the traditional
Monster Junk Sale Auction. Ample free parking, re-
freshments, talk-in on S22 and RB14 (GB3PYO). Pro-
ceeds will go to support the Group's repeaters.
Further details and trade enquiries to Brian Smith
GODAH, QTHR, Tel. [phone] after 6pm.
Scots Magnum tuting a new mobile rally at
Rally the Magnum Leisure Centre
in Irvine. This year the rally the rally to make use of the For more information,
The Cunningham and will be held on Sunday 26 swimming, skating and contact Bob Low GMOECU
District Amateur Radio March, from 10.30am. Sun- other facilities at the leisure at 2 Craigie Place, Cross-
Club are doing something day has been chosen to centre, which already has a house, Ayrshire KA2 OJR,
about the shortage of radio allow family members who track record as a major ex- Tel. [phone] (work),
rallies in Scotland and insti- are not so keen to attend hibition site. 0563 35738 (home).
HAM RADIO TODAY MARCH 1989 please mention HRT when replying to advertisements 7
Catalogues inductors covering MF to UHF. There is also a well
chosen range of RF semiconductors at reasonable
Two new catalogues from major amateur com prices. Cirkit market a range of kits and modules includ-
ponent suppners have recently been released The ing such items as a high power ATU, transverters, a
Greenweld 1989 catalogue, on sale for £1, claims to be single band transceiver kit, the new Navico 2M trans-
the largest Greenweld catalogue to date. It is a general ceiver, to name but a few. General items available
electronic components and equipment catalogue, with include audio amplifiers, an msf clock, an automatic
sections on audio, books, cases, kits, semiconductors, windscreen wiper, and a lamp dimmer. The comprehen-
and tools. The audio section concentrates on ready built sive test equipment section includes a number of items
equipment, with a few modules thrown in. There are of interest to the radio amateur, including signal
audio mixers of various types, a reasonable selection generators and frequency counters.
of basic test equipment, and wide range of resistors. The two catalogues complement each other. The
There are some rf components, such as small Cirkit catalogue is of particular interest to the radio
trimming capacitors and a reasonable range of poly- amateur, and the Greenweld catalogue can fill in some
styrene and ceramic fixed capacitors, including high of the general items which may not be available from
voltage TV types. For non-RF projects there is a very Cirkit.
good range of Veroboards, and the diecast boxes (in a Bulgin has issued a glossy 12-page colour leaflet
separate section from the cases!) could be useful for featuring its Buccaneer range of robust, modular con-
rf modules. nectors for hostile environments, ihculding waterproof
I was perburbed to notice a 3W FM transmitter kit connectors, pushbuttons, indicators and silicon rubber
on offer, with no warning that it cannot be licensed in switch covers.
the UK. Lastly, Allweld Engineering's current catalogue
The Winter 1988/1989 Cirkit catalogue costs features full details of the Altron Alitower system (see
£1.30, but the discount vouchers that come with it will Show Report, page xx).
soon cover that. The choice is limited in some general Greenweld Electronics, 443 Millbrook Rd.,
areas in favour of an excellent range of rf related parts. Southampton SOI OHX.
This is the great strength of this catalogue, and I don't Cirkit Distribution, Park Lane, Broxbourne, Herts
think that any other amateur supplier offers such a good EN10 7IMQ.
range of rf components. Bulgin & Co., Bypass Rd., Barking, Essex tG11 OAZ.
There is an excellent choice of variable capacitors Allweld Engineering, Unit 6, 232 Selsdon Road,
(including wide spaced ones) filters and ready wound South Croydon, Surrey CR2 6PL.
Fix Faults Fastest
In a search for talented young service technicians
m f m to represent Britain in the 30th 1989 International Skill
>*5 ,4%
Olympics, companies in the electonics goods and ser-
'r
- ^ > vices industries are being called upon to enter their best
young techs in the National Elimination Competition or-
A,NNiV■tSHRW5AC!O<yM - Sl-T ATKSW ganised by the Radio, Television and Electronics Exam-
■ GS2MRI inations Boards. The winner of the Elimination will go
RATHUN - ISLAND
forward to represent Britain in the Skill Olympics on
August 30th.
Entrants must be aged under 23 as of 1 January
1990. 400 entrants from more than 20 countries will
Living on an Island
match skills in more than 40 crafts. Are you the fastest
The photograph shows the members of the fixer in your lab? Ask your guvnor to contact The
Ballymena ARC who went on the club's annual expe- Organiser, RTEEB, 57-61 Newington Causeway, London
dition to Rathlin Island, six miles off the north east SE1 6BL for information and a nomination form, and win
corner of Co. Antrim in August 1988. The Marconi Anni- glory for yourself and your workshop.
versary Station GB2MRI was activated there in
commemoration of the work of Marconi and his assis-
tant Kemp, on behalf of Lloyds insurance, to establish Awards
a communications link for shipping in the area. The 3rd Annual Derby and District Amateur Radio
Rathlin has an area of 6 square miles, a population Society National 144/146IVIHz Contest will be taking
of 100, and three lighthouses, one in each corner of the place on Sunday 12th March. The contest runs from
isle and each one, coincidentally, in one of three 13.00 to 17.00 under any mode of operation. There will
separate WAB squares, D14, D15and DOS. Work out for be awards for full legal power limit contacts, low power ■
yourselves what shape the island is. (SOW maximum output) and SWL, single- or multi-
During the four days of the expedition, over 500 pie-operator.
QSOs were made, including Australia every morning. For a full set of rules, please send a stamped self-
Contact was mainly on 2m and less so on 70cm — the addressed envelope envelope to the Club addressed to
club reminds people to point their antennas towards
Contest.Rules, Derby DARS, 119 Green Lane, Derby,
square 1065VH in August this year. DEI 1RZ.
please mention HRT when replying to advertisements HAM RADIO TODAY MARCH 1989
BUY THE BEST — BUY
majmS
SPC-300D
m a
SPC-3000D ,
mm
STAY TUNED FOREVER'
SOLID BRITISH ENGINEERING With a
CvAAPrHAvClIlTuOitROSi, ROLLER COASTERS (CRP.OD) A.T.U
(Cy.GD) baluns
m
BUILD YOUR OWN A.T.U. FOR £57.40 OOP BRITISH WORKMANSHIP AT ITS BEST
CAP-25S £15.50
NEW PRODUCT FROM
CAP-25T £18.95
R/COAST £22.95 + £4.50 p&p Uj AERIAL SWITCHING UNIT
4-
BUILD YOUR OWN LOOP USING AMA3/1K £386 and
6 TO 1 REDUCTION DRIVE cc AMA5/1 £445
AND(CFIROD) CAPACITOR < IKw loop antennas
From £25.00 ■y
FEATURES OF (CRPCO) LOOP ANTENNAS o See Press Reviews/Releases for
• It has a very high Q r- 3OP further details
• Am orarde iathtiaonn 0re.8s iostfa annc eo fhrmom 300 milliohms to never C3 For more information on any of our
• Has a bandwidth from 3KHz to SOKHz o products including high power
• It has an SWR of 1.4 to 1 at the very least, f .1 to 1 A.T.U's, Loop Antennas for
on most bands commercial use,
• Will operate at virtually ground level
• The loop has a vertically polarised radiation pat- send to:
tern containing both very high and very low angle m (OTi®!) ELECTRONICS LTD
radiation (ideal as a DX antenna)
UNIT 6
• Does not require an Antenna Tuning Unit rn
• Depending on the model used it only occupies o PEEL ROAD MOUSTRIAL CENTRE
from 80cm* to 4mt of space FEB. ROAD
• It is ultra compact. light and waterproof WEST PiMBO
• Planning permission is not necessary o
t If, LANCS.
SO^
YOU ONLY NEED TWO AERIALS FOR WN8 9PT
CONTINUOUS COVERAGE FROM 3.5 to 30 MHz.
TEL [phone]
COST OF THE TWO AERIALS - ONLY £626.00 + £30.00 p&p TELEX: 629575 CONGAS
THIS OFFER INCLUDES CONTROL BOX, CLAMPS AND CABLES. FAX: [phone]
APPROVED
KENVOOD
DEALER
reonurs
electronics
SITUATED AT SOUTHERN END OF M23 — EASY ACCESS TO M25 AND SOUTH LONDON
nanzsimia 2.M. TRANSCEIVERS STATION ACCESSORIES £ (c&p)
Icom ICR7t 825.00 (—) Kenwood TH21E Handheld 189.00 MC 50 Desk Microphone 46.08 (2.00)
Kenwood R2000 595.00 (—) Kenwood TR751E'25W multimode 599.00 MC 60A Desk Microphone with Pre-amp 88.22 (2.00)
Kenwood VC10 V.H.F. Converter 161.94 (2.00) Kenwood TS71 IE base station 898.00 MC 55 Mobile Microphone with Control
Kenwood R5000 875.00 (—) Kenwood TH205E Handheld 215.26 Box 52.67 (1.50)
Yaesu FRG8800 649.00 (—) Kenwood TH215E Handheld 252.13 MC 35S Hand Microphone 4 pin 21.72 (1.50)
Yaesu FRV8800 V.H.F. Converter 100.00 (2.00) Kenwood TW41000E 2m/70cm FM Mobile 499.00 MC 43S Up/down Hand Microphone 8 pin 22.22 (1.50)
Lowe HF125 375.00 (—) Kenwood TM221ES 45W Mobile 317.00 MD1B8 Base Microphone 79.00 (2.50)
Kenwood TH25E Handheld. 258.00 LF30A Low Pass Filter IkW 32.26 (2.50)
HF TRANSCEIVERS Yaesu Fr2901l Portable multimode 429.00 SP 40 Mobile Speaker 21.06(1.50)
KKYYYYIKKcaaaaeeoeeeeeennnnmsssswwwwuu uuoooo oooodddd TTTTIFFFFCTTTTSSSS779779941358644344570770000 G GGSSSSX XX 1 I 11111196896975399665485855299950.........800000000100000000 ((((((((( ————————))))))))) YYIIIlIIocccccaaooooooeemmmmmmssuu IFFI1wiI1CCCCCCTTi 2023t227MhE282733 EE 05R6i2HE0 cR m2HEr a+ o5b ,naM W 2andI7FIms udh0 NeHlemh/c tB7laiemsdmo01ntl adb c0dota mi hidlHnoee edn alF d nVMdi dnHu hcpmFe l/PloUedSxbH U iFl e B11a252322s40e25954353 56993909c........o000050000000000m0 ple HYCVVAAHGHEESSSSSC AA 5271715 7 0 0 VVIMLPPMDcKKiooeogoiiil82nmhbccu83iteeixa 2l WDteeP SSu 7aeryySHo celnnMrpuk elttxeHedahhoaet deee dkC pCssaHeeiilhd oozzreTop ceneankerrhtdr reooMMmpsnlh lieooenosddran uule llseeU nit 21333461101723995293.........920589925960045560 ((((((((11(1112222.........505500055000000000)))))))))
Icom IC751A 1465.00 (—) KPC2 Kantronics Packet Communicator 159.00 (2.50)
70cm TRANSCEIVERS Kent Morse Key Kits 29.50 (2.50)
V.H.F. SCANNING RECEIVERS Kenwood TH41E Handheld 218.00 Kent Twin-Paddle Morse Key Kits 38.50 (2.50)
Icom ICR7000 957.00 ( ) Kenwood TS81 IE base station 998.00 ANTENNA BITS
WYASSSioo.aIgONnnen.syy Rau 1l. 08 AAAFRPRRiR5irr3OG 2b750 a9 80n6h"020dAa 0 nNiRMrdfeeha wca6een 0lidSd-v9 "oe5 nr0 yM RHezc eiver 423512844074799959......300000000000 (2.((({(5—————0)))))) KYIIIKKcccaoeooeeenmnnmmswww u ooo oooddd TTTFIIICCCTHHM404744G454310E12ER55E 1 EEH EH+ baSHH aan Fnsaa3dNdenn5h hBddWesehh1ltlda ee0dMt ll iddHoo nab niildnehc ePldS U 1222223199967529983325.......00850180050084 TSSHBBem-lrrp-liiQfccai eloo Alcmm emc mmepar olaglm7yBBa.pmi1aacrllM auuoetnnpHig n gz41Dg : :1E 1iiTp npo5saIoklukpxeWWle yac t 1eToPn0rr.mstEar p.e Ps x. (p2a5imr) m 111410033......266998505550 ((((((000111......227555505000))))))
Icom IC Micro 4 Handheld 279.00 Large ceramic egg insulators 0.85 (0.20)
V.H.F. SCANNER ACCESSORIES
A.K.D. HFC1 HF Converter 49.00 (1.50)
Revcone Discone Antenna 30-500MHz 32.16 (3.00) URM67 low loss coax 50 ohm per metre 0.80 (0.25)
Icom AH7Q00 Antenna 25-1300MHz 82.00 (3.00) ICOM 10751 A UR76 50 ohm coax dia. 5mm per metre 0.35 (0.10)
UR70 70 ohm coax per metre 0.35 (0.10)
AYaNesTuE NNFART 7T7U00N SEhoRr t wUaNveI TliSst ening 59.00 (2.00) HF All-band Transceiver 4UmRm95 5P0o loyhemste cr oGauxy dRiao.p 2e .(34m00mk g) ppeerr mmeettrree 00..2450 ((00..1100))
Yaesu FC757AT 349.00 (—) 50mtrs. 16 swg hard drawn copper wire 6.95 (2.00)
Kenwood AT230 208.67 (2.50) Special Price £1395.00 75ohm Twin feeder light duty per metre 0.20 (0.10)
Kenwood AT250 auto 366.00 {—) 300ohm Slotted ribbon cable per metre 0.32 (0.10)
GOODS NORMALLY DESPATCHED WITHIN 24 HRS - PRICES CORRECT AT TIME OF GOING TO PRESS - E&0E - MAIL ORDER AND RETAIL
BREDHURST ELECTRONICS LTD "HIGH ST, HANDCROSS, W. SX. RH17 6BW [phone]
HAM RADIO TODAY MARCH 1989 please mention HRT when replying to advertisements 9
ICOM
VHF/UHF FM Handhelds
If you want a handheld with exceptional All ICOM Amateur handhelds are supplied with
features, quality built to last, and a wide variety a flexible antenna, rechargeable nicad battery
of interchangeable accessories, take a look at pack and an AC wall charger,
the ICOM range of FM transceivers.
IC-2E 2 Metre Thumbwheel Handheld
This popular transceiver from ICOM is still available after eight years of production.
If you're looking for a straightforward but effective handheld the IC-2E takes some
beating. Frequency selection is by means of thumbwheel switches (with 5KHz up switch),
with simplex and repeater operation possible. Power output is 1,5 watts or LOW
150 milliwatts (2.5 watts possible with BP5A battery pack).
MICRO 2E/4E
These micro sized 2 metre and 70 centimetre handhelds give the performance
and reliability you expect from ICOM. Measuring only 148 x 50 x 30 the micro fits in your
pocket as easily as a cassette tape. The micro features up/down tuning switches for
quick frequency changing, 10 programmable memories, LCD readout and 1.5 watts
output (2.5 watts possible with BP24 battery pack).
If
IC-02E/04E Keypad Handheld
These direct frequency entry handhelds utilise a 16 button keypad allowing easy
access to frequencies, memories and scan functions. Ten memories store frequency
and offset, a front panel LCD readout indicates frequency, signal strength and transmitter
output. Power output is 2.5 watts or LOW 0.5 watt. (5 watt is possible with the BP7
battery pack or external 13.8v D.C.)
IC-2GE/4GE
The 'G' series of handhelds fulfills the most important criteria for a handheld
transceiver, it is small, rugged and easy to operate. The 20 memory channels can store
simplex and repeater frequencies and with the several scan functions there is no need
to manually search for activity. The 3 watt output and power saver circuit ensures low
battery drain. (7 watts is possible with the BP7 battery pack or external 13.8v D.C.)
IC-12E 23 Centimetres
Similar in style to the 02E/04E this 1296MHz handheld utilizes ICOM's experience
in GHz technology, gained by the excellent IC-1271E base station. With the growing
number of repeaters on 23cm the IC-12E makes it an ideal band for rag chew contacts.
Power output is 1 watt from the standard BP3 battery.
IC-32E Dual Bander
This exciting new handheld offers 2 metres and 70 centimetres in one compact unit.
Tough and splash resistant it offers many features including crossband duplex operation,
20 dual band memories and power saver circuit. The 1C-32E utilises most existing ICOM
accessories, ideal if you are upgrading from an existing ICOM handheld.
Also available for ICOM handhelds are a large range of optional extras
including rechargeable nicad battery packs, dry cell battery cases, desk chargers,
headset and boom microphones, leatherette cases and mobile mounting brackets.
i New products just released:- HM46 miniature speaker/microphone and HS51
lightweight headset/microphone complete with PTT and Vox unit.
(com (UK) Ltd.
Dept HRT, Sea Street, Herne Bay Kent CT6 8LD. Tel. [phone] Hour.
10 please mention HRT when replying to advertisements HAM RADIO TODAY MARCH 198y