Also Revie\Ned IC-7S1A HF Transceiver • Build A High-stability VFO • Read Our Useful Guide To ...

76 Pages·2014·24.95 MB·English

• Also Revie\Ned IC-7S1A HF Transceiver
• Build A High-stability VFO
• Read Our Useful Guide To 2rn Operating
www.americanradiohistory.com
Reg Ward & Co.
Ltd.~~·
1 Western Parade, West Street, Axminster, Devon, EX13 5NY.
Telt.'pholle: hmillstt'r ({l297) .~918 .
-- )'aem -- [('om Pro{/ul'ls - - Kellwood
FTl HF Transceiver P.O.A. I- I IC761 New Super HF Transceiver P.O.A. I- I TS9405 9 Band TX General Cov RX 1995.00 I- I
FT980 HF Transceiver 1750.00 I- I IC751A HF Transceiver 1465.00 I-I AT940 AutoJATU 244.88 12.501
SP980 Speaker 110.00 12.501 IC735 New HF Transceiver 949.00 I-I SP940 Ext Speaker 87.55 (2.50)
m67 HF Transceiver 1550.00 I- I AT100 lOOW ATU 17510451 365.00 13.501 TS930S 9 Band TX General Cov RX 1695.00 I-I
FEX767121 2m Module PG7) 169.00 12.501 AT150 150W ATA 17351 315.00 13.501 AT930 AutolATU 206.03 12.501
FEX767(701 70cm Module (767) 215.00 12.501 PS55 Ex] PSU 17351 185.00 13.001 SP930 Ext Speaker 90.94 12.501
FEX767161 6m Module (767) 169.00 12.501 IC505 50MHz multi-mode portable 459.00 I-I TS440 NEW 9 Band TX General Cov RX 1138.81 I- I
CFmYYYMNSSMmFTFTHSPHMeMM2T9C2131AA439102BB01l94 0 2 915 '4 1 05 0 7MCCS7722MMS200mmm0pphaokoccceear lbbmmmrlaMaHMr yiigklNkl sieee/ineeMel nMle t girrMr2cBBi w i onawMH/rrC dMaaliS/ aiaeccHktv-ouskkV e eepdPeeH etteo r r Pt2/To9rr0taf Tnsracnesivceeri ver 2332442211762371323726795990'.............50555555500000500000000000 11111111112211111112..........III55555555S0---0000000O001111111I/I1II IIIIIIIIIIIIIICCCCCCCCCCCCCC42R0242 224031MBEE7428899227SEEE EE00H01i cD E0 r o G777722222222NE000053mmmmmeeWccccc nw NnmmmmmT4H 2o Ce55h F2/ H2HHHwwlWoeMmDO5 v/l l HH H uOM WWMF2 Ra r5Mi /lXin FMMg BBiiM nloaaHM adnslMHloeed Hd oSFebIHMI inl e M obile 1855362222244032145232989942597985959592699..............0000000000000000000000000000 1111111133333333.....II...IIII00000000-----0000000-0I1111I1111IIII TTTAASS5PPFMBSPMSPMSST5TSBS442448582424O)333433 33O23 0000000000 SS S P AHESA1FlMMMBl666xMlIaulaaol0Da00t nt ettblB-omrudccBinrliolaht0 hnlAo-·yenSnii1mIaa Tnn OdcP0MlrMg gUo dmmSST A op oPSUp rfTeunToaTepo UnirnrarewUt aato/skaTiePnnnncerkSr sisoegre t4c c wiS rvU(3eeB 8eue0iin3rvvrrpa 0i eetpcM91 rrkl 9 yeBe4 tt0ae n)r ds 1992203112472067n44914087824633845o............888600244675o117200599328 1111111111122322222223........(I...55555S05--555000000O0000111111I/111JI
FNB9 Spare Battery Pack (23173) 25.00 11.SOI IC7000 VHF/UHF Scanner 957.00 I-I Tl922 101160 2K Linear 1495.00 17.001
FNB10 Spare Battery Pack (23173) 30.00 I1.SOI AH7000 25-1300MHz Distone 82.00 12.SOI TM221ES 2M 45W Mobile FM 317.17 13.00/
FNSll Spare Battery Pack (23173) 46.00 11.SOI SP3 Ext Speaker 61.00 12.001 TM421ES 70cm 25W Mobile FM 372.08 13.00/
NC.18C Charger (23173) 12.35 11.501 CK70 DC Cable (R701A71) 7.00 11.501 TH21 2M Mini H/H 189.00 12.501
NC.28 Charger (23173) 15.40 11.501 EX257 FM Board (A701A711 41.00 11.501 TH41 70cm Mini HlH 268.00 12.501
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FT211RH 2m FM 45W 299.00 I- I DCl DClDC converter operate from l2v 17.25 (1.50) HAND HELD
MFRMGS916000 M M6Oo-9b5il0eM BHraz cSkecta nning RX 50190..0000 11.I5-01I ~~~ ~Oc~e~il~~li~~~/4n Antenna (BNC) 99..2200 1111..550011 BDTC221 2115..8006 1111..5500!1
NC9C Charger 11.50 11.501 HM9 Speaker/Mic 21.85 12.001 EB2 ase TH21141 6.77 11.501
PFAN3B 2 ~~~~d~~~~*~~~1er 2215..8050 1I11..SS0011 HHSS1100 SA VHOeXa dU sneitt HBSoo1m0 (0M2iIk0e4 E only) 2205..3700 1111..550011 HP8M2C1 l ~ Pack THV21o1x4 1T H21/41 2342..3916 1111..550011
YM24A Speaker Mike 27.00 I1.S01 HS10SB PTI SW Box HS10 20.70 11.501 8C6 Charger TH2114l 99.00 12.001
m26R 2m Base Station 999.00 I- I LCl Lealherette Case 284E .. BPS 6.90 I1.SOI SC Soft Case TH21/41 11.86 11.SOI
4FFF3RRR0VTG1787878280060Q0 0R X CAH70F.oT cn.RmUve e.cM retooivrd eulrl lSe -f1o7r 5a fboorv aeb ove 36153409990....00000000 111322...I000-00011I1 LLLSCCCS13 11 4 1 LLLSeeehaaaotttuhhhleeedrrreeeerttt tttSeee tCCCraaaapsss eee 0022E2E1E41!E0044+EEB ++PBB 3P P53I 718 16990....92235000 111111... 550011 RIESSS4 PPp eDDaeekssekkr /MMMiiiccc TH21/412600 482B68...302182 11(221...55500011)
MMMFDH111ABB388B DBHeoasonkdm 6 60m000o SbSpiplienin mmmiicicc 722159...000000 111111...55500011/ OS5MTMH68E R ACCES61S.0 3O0KR01hI6Em0S0 8nP 8 PB aBsaes eM iMc ic E8DPlee scFkti rsiMtc MiDc iecAs uk dMioi cL evel Camp 592329...902802 111122..5S5O00I/1
YH77 Lightweight phones 19.99 11.501 SM10 Camp/Graphic Mike 4P Fist Mic 21.72 11.501
YH55 Padded phones 19.99 11.501 Mobile Mic (6br Bpl 52.67 12.501
YHl Uweight Mobile Hlset-Boom mic 19.99 11.501 HF Low Pass Filter 32.26 12.00/
SBl PTI Switch Box 2081708 22.00 11.501 Receiver ATU (Mizuho) 67.28 12.501
SB2 PIT Switch Box 2901790 22.00 11.501 Lightweight H/phones 24.36 12.001
SB10 PIT Switch Box 27012700 22.00 11.501 Dcluxe H/phanes 37.54 12.001
FF501DX Low Pass Filter 38.SO 11.501 SWR/Pawer Meter 1.8-15 0MHz 49.50 12001
SWRtPower Meter 140-450MHz 49.50 12.001
-- Linear Amps SWRtPower Meter 1.8-15 0MHz 107.99 12.501
SWRlPower Meter 140-450MHz 107.99 (2.50)
SWAlPower Meter 1.8-54MHz 2K 117.17 12.501
TOKYO HI POWER 2m ATU 38.18 12.001
HL 160V 2m, lOW in, 160W out 244.52 12.S01 - - Power Supplies
HL 82V 2m, lOW in, 85W out 144.50 12.S01
HL 110V 2m, lOW in, now out 249.00 12.SOI
HL 35V 2m, 3W in. 30W out 76.00 12.501 ORAE .,NUS
HL 30 2m, 3W in. 30W out 54.00 12.501 4amp 43.40 12.501 6amp 75.00 13.00/
HL 30V 70cms, 3W in, 30W out 122.50 12.SOI 6amp 65.00 13.001 12 amp 125.00 13.501
12 amp 86.50 13.SOI 25 amp 185.00 14.501
MICROWAVE MOOUlES 137.40 12.001 24 amp 125.00 14.S01 40 amp 385.00 14.501
MML 1441JO-LS inc preamp (1/3 w i/p) 34.90 12.001 -- Aerial Rotators
MMl1441SO-S inc preamp, switchable 89.70 12.001
MMMMMMMLMMMMMM1LLLL4LL41444 11334134422442141111J10S113120O00000- S0L000-- S HL SS iiliiiinnninnnncccccce apppppprrrrrrr eeeeee(aaaaaalOmmmmmmwpppppp i((((((/311lp2lO1/O/)5313 www0ww1 2ivvvVl5ppppp lll))i lpl MKRFeao ynrsbsuwoeai atlTc rudRh Fte~mo dcisr oll pipp;rerrshp eee~rec·ee arhsc~ m eetfco~inpvlrride pcTerp~srr~e i o~rs u 118885533272296669........8830430700005005 1111111122222222.......000000000000000011111111 AAKKKKKRRRRRRRS624244O050000O0 0000 RR XCCl 5686MLli iggccccehoooohdrrrtrtl eee eHWD HEMMuDeleteeeuiygavtdd yhvaii yuutt i mmoDn u DDtyuu ttyy 2111157612348999599.......00000900000005 11111113333233.......05000000000000111111/
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LPM 144-3-180 355.00 13.001 Auto Woodpecker blanker 86.25 12.001 - - Switches
LPM 144-1()..180 355.00 13.001
LLlllllPPPPPPPMM MM M11 44444444433333·-3222212·-0---·S33111-O---001 --0100 0 77OO0cccmmmm,,,, 33llOOWWWW Ii nniinn., ,.Sl OSO1O0OW0WW Wo oou ouut,tut ,.p t ,pp reprreeareaamammpmpp p 322231195159445555555.......00000000000000 111((((3333333.......D000000000O000111)))) TIPCKoSn6/4oA 5E5A0 C HCR'eoIamdRperle Tte PTacYke VAEmtqor uterimpinmal en3223t99.. 00-00 1133..000011 WWKSSOOMMerreeaanlCCeelzpl SSro 22 KNUP 21N3322222N wwwwww aaaaaa50yyyyyy2 'S'S'S3nnn9w00''' 22iSSSt33ckkk99htttsss 22241119397859.......95009945000500 11111112222222.......000000000000001111111
PK232 PackeVRTIY Terminal 269.00 13.001
'-;WRlPHR .Heten -- -- Miscellaneous
BENCH ER
WHFFFFSSSSA7S2332NO001000S0V VH EP N 5S11lOO4..880··--1l-61545050300M0MMMMHHHHzHzz z 2z2 20 2002101102/222/0020000000/ 0lI Pn0WAWtWue trR ovla SSlW WPAER P /SWA 15556033326.....55S77O5000 1111122222.....555S50000O1111I BBVIIVVaaYYiiImmbbB2lrr b bRooiikkcOcee PDSyyleeteEarrlX nuDSxd teeaal rSSundqqdx euua eerdee zzee KKeeyy., CBlharcokm bea sbea se 676776768383......949003279893 111111223333......SS0000OO0000111II1 CCCTTOT123TTTR000522A 00030E 0AN W3222l1o00000ao0W0WWvWWW e DDD mDDDuuueuuummmtmmmemmmrmmm yyyyyy LLl oooLllooaoaaaadadddd d NP (L.S 2OP5Ol9uW gsH min) 5532218726885.......99550095900500 11111112222222.......500000000000001111111
The Original Standard 73.54 13.001 ORAE 2m Pre-set A.T.U. 14.50 12.001
The Original Oeluxe 82.7413.001 TOKYO HI-POWER
WELZ HC200 10-80 HF Tuner 115.00 12.501
SP10X 1.8-150MHz PWRlSWA 39.95 12.501 HI-MOUND MORSE KEYS HC400 10-160 HF Tuner 199.00 13.501
SP122 l.8-60MHz PWR/SWR/PEP 79.95 12.501 HK703 Up down keyer 38.35 (2.00) CAP CO.
SSSPPP224222050 111.4.880-·22-5002005MMMHHHz,z PPPWWWRRR//SlSSWWWRRR//P/PPEEEPPP 569799...999555 111222...555000111 HHHKKK777000764 UUUppp dddooowwwnnn kkkeeeyyyeeerrr 222160...381055 (((222...00000011! ASSPPECCR33IA00L00D0 TD U NER3lkkSWW PPEEPP 232255..0000 1166..000011
SSPP482255 11.4B(-)2"50205-4M3H0z-8 P0W0-R12lS4W0MRH/PzE P 111699..9005 1122..S50O1I H~K~~860g3 U~~p d~o6w:~n s~~orl.id~r bbrraassss 110~4.:5~0 (g2:.5~0): 11--14 B8aalluunn 1166..7755 1111..550011
TTO43Y0O 1441432 120 W 52.SO 12.501 ~~~~3 ¥~i~op~dd~:y:;yer metal base =:~ gg::8g8g:: --- TrallsJ.'erters
T435 1441432 200 W 58.00 12.501 ~~~~ i:l~ ~~~~l~ ~:~er marble base ~:~ MICROWAVE MODULES
STARMASTEAKeyer Unit 54.70 (3.00) MMT5OI28S lOm-6m TranSverter 289.80 (3.00)
\C(llllllllg R('ccil'en - - STARMASTERKeyer Unit CMOS Memory 95.00 (3.00) ~~i~~R ~~~~OmT2;~vO~er ~:: !~:gg:
KENPAO MMT144128 2m-10m lOW O/P 139.84 (2.50)
SX200 VHF/UHF Scanner 325.00 13.001 KP100 Squeeze CMOS 2301l3.8v 109.25 (3.00) MMT432128S 70cm-l0m Transverter 195.50 (3.00)
SX400 VHF/UHF Continuous Coverage 645.00 13.001 KP200 Memory 4096 Multi Channel 234.55 (3.001 MMT129&'144 23cm-2m Transverter 258.75 (3.00)
AOR2002 VHF/UHF Continuous Coverage 487.30 13001 AERIALS BY:-JAYBEAM - MINIBEAM - HYGAIN - G. WHIP - MET - TONNA
HX2000 HlH Scanner 269.00 13.001
.-----__ '\PI\l11Illl'd ;ll!l'IlI
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going to press
www.americanradiohistory.com
OCTOBER 1987 (ON SALE 10 SEPTEMBER) VOL. 63 NO. 10 ISSUE 967
22 Visual Alignment of IFTs
Chas E. Miller
24 A Guide to 144MHz Operating
David A. Dodds GM4WLL
25 Errors and Updates
Dayton Hamvention Report, Aug. '87
Multiple Choice, Sep. '87
PW "Blenheim", 5ep. '87
26 Testing Op-amps
Martin Michaelis DKIMM
28 PWRevlew
Icorn IC-7S1A h.f. transceiver
Ken Michaelson G3RDG
32 Practically Yours
Glen Ross G8MWR
34 More Power to the Consumer
John McQueen
36 A High-stability VFO
The Kanga Gang
41 A Smarter Repeater-2
J. M. Bryant G4CLF
43 A Roller-coaster Turns Counter
K. Buck
46 The Microwave MESFET-2
BrianDance
49 PWRevlew
Hung Chang 05-620 Oscilloscope
Geo!! AInold G3GSR
* *
51 PW SPECIAL OFFER
Hung Chang 05-620 Oscilloscope
Regular Features
71 Advert Index 54 On the Air 31 Subscriptions
52 Book Service 35 PCB Service 26, 38, 42 Swap
16 Comment 17 PW Services Spot
18 News Desk 67 Short Wave 16 Write On
Magazine
Editorial and Advertisement Offices: Editor Geoff Arnold T.Eng FSERT G3GSR
Practical Wireless Assistant Editor Dick Ganderton C.Eng. MIERE G8VFH
Enefco House Art Editor Steve Hunt
The Quay Technical Features Editor Elaine Richards G4LFM
Poole, Dorset BH 15 1P P Technical Projects Sub-Editor Richard Ayley G6AKG
"oi' Poole [phone] (Out-of-hours Editorial Assistant Sharon George
service by answering machine) Technical Artist Rob Mackie
Prestel202671191 Administration Manager Kathy Etheridge
Advertisement Manager Clerical Assistant Claire Horton
Roger Hall G4 TNT "oi' 0 1-731 6222 Accounts Annette Martin
COPYRIGHT © PW Publishing Limited 1987. Copyright in all drawings, photographs. and articles published in Practical Wireless is fully protected and
reproduction or imitation in whole or in part is expressly forbidden. All reasonable precautions are taken by PractiC81 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.
Practical Wireless, October 1987
www.americanradiohistory.com
the KENWOOD TS530SP HF transceiver,
a sensible rig.
To cope with pul8e type noiae (such as ignition), the transceiver
has a noiSe blanker.
Both BIT and XlT (receiver as well as transmitter incremental
The TBIO T8830SP HI' tranaceiver is similar to the TS830S in tuning) are included to aid operating, XIT being a distinct advantage
that it also uses a pair of 6146B valves in its PA stage. The when caJl1ng a station that is liStening "off f'requency".
transceiver has been designed for the amateur who has no need for T883OSPHFtransceiver .....................S 87.BlincVM,carriage£7.00.
the additional facilities that are part of the TS830S but who sUll
requires a high level of performance f'rom his equipment.
The TBIO T8830SP covers the amateur bandli f'rom 160 through
to 10 metres. Modes of operation are USB, LSB and CW.
Operating from 840 volts Aa the transceiver has its own internal
power supply.
IP shift 1a built into the T8830SP to allow the IF passband to be
moved around the received signal and aW9{f f'rom interfering signals
and sideband splatter. Even greater selectivity is achieved when an
optionaJ YK88SN (1.8 kHz), YK88C (500 Hz) or YK88CN (270 Hz)
ftIter is inStalled.
A tuDable notch filter is built into the audio system of the
TS530SP.
The speech processor in the TS530SP combines an audio
compression amplifier with a change of ALe Urne constant for extra
audio punch and increased average SSB output.
solid state perfection
the KENWOOD TS430S hf transceiver.
For the last four and a half years the KENWOOD TS430S has been a Programmable band scan is available, the limits of scan being set by
firm favourite with many radio amateurs. Olfering excellent memory channels 6 and 7. Again, the hold sw1tch will cancel the
performance coupled with outstanding rellab1l1ty, the transceiver scan function.
gives inStant access to the amateur bands and, at the same Urne, is a
first class general coverage receiver. Key features of the rig are the IF shitt enhances liStening on toda.Ys' busy bands.
two digital VFO's, eight memory channels, programmable band scan, A tuneable notch filter is included to give the best interference
IF shitt and a notch filter. reJection.
The TS430S runs 200 watts input on SSB/CW 160-15 metres; 180 A f'ront panel NAWWIDE sw1tch allows narrow· wide IF filter
watts on 12-10 metres, in AM mode, it runs 80 watts on all bands. selection when the optional filters are inStalled.
With the FM option fitted the rig runs 100 watts input, again on all
bands. The TS430S operates f'rom 13.8 volts DC or from 240 volts AC A f'ront panel sw1tch activates the speech processor circuit, with its
by means of an optional power supply. audio compression cirCuit and change in ALe Urne constant,
resulting in a marked improvement in intelligibility, accompanied by
Its modes of operation are USB. LSB, CW and AM. FM is available as a marked increase in "talk power".
an option. Mode selection is easily accomplished by f'ront panel
switches with adjacent LED indicators. All mode squelch cirCuit.
In addition to the amateur bands f'rom 160 to 10 metres, the TS430S Connections for a transverter are included on the rear panel
features a 150 kHz to 30 MHz general coverage receiver_ Front making the TS430S an ideal driver for 6 metres, two metres, seventy
panel upmOWN sw1tches allow easy selection of the desired amateur or twenty three cenUrnetres.
band. A MHz step sw1tch provides I MHz steps across the entire
range of the transceiver and each of the two VFO's is completely
tunable f'rom 150 kHz to 30 MHz.
The two digital VFO's operate independently of each other tuning in
10 Hz steps. A STEP sw1tch is provided, use of which increases the
tuning step to 100 Hz. An A!B switch is provided to quickly put both
VFO's on the same f'requency, ideal for checking on the source of
QRM without losing the original operating f'requency.
Each memory stores f'requency, mode and band information, the
eighth memory holds receive and transmit f'requencies independently
so giving simple split f'requency operation. A f'ront panel VFOIMEMO
switch allows each of the memory channels to be used either as a
VFO or as a fixed channel. The TS430S also has memory scan. Not
only does the memory hold frequency but the mode also, most useful
if a mix of broadcast f'requencies has the odd SSB net f'requency
within it. The hold Urne for an occupied channel is apprOximately 2
seconds, a hold sw1tch is provided to interrupt the scann.ing process.
LOWB BL-CTBOlUCS LTD.
Chesterfield Road, Matlock, Derbyshire DE4 5LE
Telephone [phone], 2430, 4067, 4995.
2 Practical Wireless. October 1987
www.americanradiohistory.com
45 watts on 2 metres, the TM221E.
35 watts on 70 centimetres, the TM421E.
The new XlIlrWOOD TIIlllI1B and T11421B two metre and seventy Occa.a1onally a piece of equipment cornea along which catches the imagination; the
centimetre I"M mobile transceivers have been specifica.lly designed to RClO remote controllerlhanc1Bet for Lbe TM221E and TM421E does Just Lbat. Designed
condense ma.x:i.mum performance and operaLing convenlence U1to a compact to operate WiUl either transceivers or link both together, the RetO looks more l1k.e a
package. Output power is 45 watts on two metres (TM221E) and 35 watts on 70 cellular radio car phone than a piece of amateur radio equ1pment.
centimetres (TM421 E). Receiver sensitivity matches the output power of t.he set In fact the RCIO not only looks like a car phone, but as a speaker and microphone are
and measures an amazing 0.141uV for 12dB SINAD (across 144-146). The buUt-in. operates as would a telephone handset. Easily mount.ed in any car, dashboard
figures are those given by Chris Lorek in rus recent TM221E revtew pubiiBhed or transmission tunnel, the RelO controls an transceiver front panel functions Wlth the
in the July edition of HAM RADIO 'l'QDAY. exception of on/off and h1gMow power selection. The functions controlled by the RClO
Much 418CUMion has taken place recentiy rega.rdlng 12.5 and 25 kHz spaced are volume, squelch on/off. frequency readout, keypad frequency entry, memory selection
frequency channels on the two metre band. With the new mobiles cha.rrnel and frequency or memory sca.nning. Full duplex operation is possible when both
spacing Is not a problem. KENWOOD with their usual attention to deta.U have transceivers are fitted.
made the frequency step user selectable. The steps available are 5, 10, 12.5, 15, From a security point 01 view It may even be possible to mowtt the transceivers out
20 and 25 kHz. Once programmed either microphone upfdown butt.on or the of sight and only have the controller on view. Since most thieves now know that a
transceivers front panel knob can be used to step thf! transceiver across the cellular phone is not a saleable item, oWTling an RCID may be a Wlse investment!
band Of course should it be necessary the selected step can easily be changed. Although I have not seen the RCIO, I am of the opinion thli.t it wUl do much more wan
A new orance backll.t liquid crystal 41splay gives the transcelver an I have already described. r suspect that It will be possible for the RClO, when used Ln
amazingly clear frequency readout that can be read in the b('ightest of &'Unl1ghL. conjunction with both 2 metre and 70 centimetre transceivers, to operate a.s a personal
The tranaceiver hu all 888ent1al operatJ.ng aida. There are 14 memory repeater. Parked at the top of a multi·storey car park and left unattended, I would not
channels. each of which holds frequency. whether slmplex or repeater be surprised if you could not talk·in to the installation from another small handheld on
operation is required and whether or not the tone burst is on or off. Sca.ruung 70 centimentres (~ a TH41E) and have your transmission re·broadcast at a higher
can either be memory wit.h the ability to lock out unwanted channels or band power from the good location on 2 met.res. AIly reply would be re·transmitted to you on
with the scan limits set by the operator. The usual priorlt.y channel facility is 70 centimet.res. Usefu1 and ideal for staying in contact when wa.nderirlg around town.
also included to make sure that no call Is missed. As well a.s showing the Helpful also for RA ¥NET use.
operat.1.ng frequency the display also indicates which of the facilities are being 1'IU2111 "317.30 incVU carria&e "7.00
used. TIl42111 ..3 7a.ooincVUcarria&e ..7 .oo
the new dual band transceiver
froIIl KENWOOD, the TW4100E.
Uain4 the latest in te~ology. the designers of U,e TW4100E dual band FM to simplex. Of course, two more presses of the same buttons restore the
mobile transceiver have achieved increased performance and. at. the same t.ime, facilities.
made operation even easier. The operataI' can pre·set the transceiver according
to the band plan and his preferences. Options available are shift. ( +, - or Linear amp11flera are not needed with the KENWOOD TW4100E' Power
duplex), frequency stepplng (5, 10. 12.5,20.25 or 50 KHz) and repeater sttift output from the transceiver is 45 watts on two metres and 35 watts on seventy
(600 KHz. 1.6,5. and 7.6 MHz) centimetres, more than enough to cope with difficult terrain.
With the ICJD..NWOOD TW41001J, not only do you have the normal simplex The TW4100!l haa another facWty not mentJonal in the handbook. Not
attranakdne ssrm eoiptnet Jaa.tn egnr e imwns otmdeeaesda nboiufnt gU c lrIeof usthssbueaa nflu d'lbl dlaeuuepdpli"eo xa .cnaa.dsn lwobesels l .h oePfa Msridogr nwja~hl. i clIshft a yynoonuue lw aomrerok n aitnoortihnegr oomupetensritaditoein otenhd eo brc eoecnmagupasa8ese sud n oolfen ts has e yr eolaiucl eaenmrceee raag seA nwAceY y .Np tEroeT su esmnete Jtmyh ebk eenrqo ouwin p imat. ne natp ipnr osvuecdh a way is
saocoomthonaenvtr ee,c ruoasrnam tdwei o hmtnoo a isncp ayrpen ofs setasarli stbtioioll eens. isAmn danuotylu othranaanelve ewoc ouhtnhsolviy she rtafsrsaaac tnniilsooitmnty ,ei sxttt hpyoeelnenr i oetahnn aectete bdl1ea 5dp nuhpdpoo lasnesnexid b s oltelpy.ie slretae tni. .nogn wthilel TRTmWFhe eab4 nl1fasa0c 0ctkhEW sa wptt oyrytu o.lc auAh .rct mhsaianent dc p tewah yreikto hT uy W aol eu4sf1rmt 0cia0ta.lE lrh lawionswi lba l p eadoecewntc eaecrsno thna as lotnpacdrnaihvtteiiayoltd nec. haycenrocoduks sicwnbagaann n ttddhae elrrk e t opwbfeafoac itkpne trrtoe.o ·T satehhntie s
Wofotrrpreai eqntohrusfa.fec .t nteiBhociyvyne e, p brhsu yiisimgs hp .hp1erlno alegsvexy iv ad o etirosnl i grnoo egfptple eteenrr aaa bttmteure:rtel. t .moocKp noEoe rNanrialWe ltst ioO,to .dOhenlaa Osacy inh'ensd n fo orgwfori nmwhaeedhaetsthiric,soe h irnht woaicsvria l enlen s ohsbstioee m lntdthptri Ueaal. nfn!t' lofsetofnhdleea 'rm ttrb.h eauaetd ri omsrtintogo l'bSsoth i nloee n cathrmreruaaoecvtnsoosesssgm ambnagaainiestntoie tdceitd s hd U feR rarbregAn qyaeaYu i·mtoneNinlu aEescttT iieTame u.uWsfurts. el4eYitr.n1a oa0n Iyunp0eropEo urutr erorospa lxncynei am astrrmhtea eetttrio ers oa mlsyontihovo stdeenmhrre rs i iebstetteh eaer endemt dch K.etie onEiW v uNoyehtpWodeee usOnra.. a OnOatdDi fo s csntTaio mWtauinrou4sdln1et 0a iryn0te oEepmuo li huuensasselts,ye bt dhe e toa
VFO. Of course the original information is still held ill memory for future use.
You therefore have ten independent VFOs. KENWOOO's attention to det.a.i.l is The TW4100B haa prov1.oion for DCL (digit.al channel link) and DCS (digit.al
shown by the following additional facility. If havtng transferred a repeater code squelch) when the optional MU I board is fitted
frequency to the VFO, you move onto an a4ja.cent simplex channel, you can, by
the push of two buttons, cancel the tone burst and reset the shift from repeater TW4100B .........................................................................S 99.00incVU.carMage £7.00
LOW. BI.BCTBOlIICS LTD.
Chesterfleld Road, Matlock, DerbYShire DE4 5LE
Telephone [phone], 2430, 4057, 4995.
Practical Wireless, OClOber 1987 3
www.americanradiohistory.com
' T e c h T a l k ' t
Reduced size yet high performance HF "nlenn"s are becommg Iflcreasmgly pepulal amon') today s radio amateurs and ICOM IS
proudly respendmg to those needs with a deluxe antenna system The AH 2 This all band and fu;ly autamallc amenna package IS especially
deSigned for luxury style moblltng pertable actlvllles such as vaCallOnInCj or operating from environmentally senslllve areas
such as apartments
Mobllmg In top fashIon hasn! been morf' attractlVt', and ICOM's' all m I)ne" deSign boasts nUl1lArous advantages over convenllonal
"mixed components" -type setups Whether pursuing fixed statlc·n III mobile, (etr/llles the Oexlblilly and convemence of this fully remote
controlled and automatically tuned antenna OlJens new hOrIzons In ltmlled antenna Hr operations. Slllce the AH2 system IS packed with
unique features and IS a relatively new Idea, we would lIke 10 diSCUSS ItS mnovatlve·deslgns m cl stepby·set manner
There are five compenents In the ICOM AH·2 system The package Ciln be purchased complete or mmus the mobile mount and whip
for auto of fixed station use as deSired The full system consists 01a sllIall ngcjllilched control Ullll a remote actuated and microprocessor
controlled antenna tuning UOlt an approximate OIne·foot stamless steel WhiP, a uOlversal and heavy duty auto frame mount
and an Interconnectmg cable set
An oplIonal OPC.137 cable mterfacc IS ;;vallabl,' fe'l the fC751 c,r le 745 Hr trilnscelvelS When USing Ihe system's stamless whip
operalIonon all amateur bands between 35 and 30 MHz IS posslb:e When th~ lilcllatll1g whip IS replilced wtlh a random vIlle40 feet or longer
1.8MHz opera lion IS also poslble DUrIng opera lion. you merely select a band and frequency push Ihe remote ull1l's ·tune' button, and one of
over 260.000 LC combinations IS digitally selected for optlmullltranSTlllt antenna perfcllllilnce Tuning acllvns require only ten watts of RF
power, and the resulting SWR IS J 5 I Usual tunmg tune IS less than 51X ~econds The antenna tUlllnn unll S TlllcroprocAssor stOles that Le data
In one of eight Internal memones so that Il1fOrmatlon IS
recalled In less than two seconds when the Hr transC81vel
retunes a preselected range An additional mlcroprocessol
m the ng·atlached remote control UOlt handles automatic
transceiver tune mode sWltchmg and RF power output \.'onrroi
Notice the tuner's capabilIties are used dUflng both
transmit and recetve. Its four sensors (Impedance phdS,"
forward and reflected pewer) are deSigned to optlmt::~ bOlh
Single !ongvJlres and whIps or random wIres Shorlel thaIl
'/1 wavelength a difficult task for many autolllatlc tuners
Notice. also. the precise use of microprocessor selected
fixed caR9cltors rather than molor driven vanflbles Thl:;
overall concept prOVides superb antenna tunmq ana the
highest posstble performance
The system's whip and mount truly gives new ,'Idllty
to the termsuOlversal' and "heavy duty They car. bp
qUickly Illstalled on a TV mast, boat or car. The mount s
bracket bolts to an eXistIng hole III an auto s rear frame "
very strong pipe bolts Into the bracket and the alllenn,', ,;
base secllon bolts te the pipe s rematntnq encl The PIP~' -,'i'
length IS fully adJustable:o fit vanous cars The ,mtenn" h"sc CO .... IA~ c .. Bl(
section, Illcldentally stands IS Illches tall and weiGhs
approXimately mne peundsRugged IS truly art
understatement'
Whether assembled as an all bend
mobtle system or employed In fixed
station use when large arrays are
unfeaslble. ICOM's dual micro
processor controlled AH·2 Will
keep you commuOlcatlllg In
high style. ICOM IS
brIdgIng new areas
In commUnications
and wants you to
enJOY thiS
leadIng edge
III modern
technology'
~~~~~~~~:~!~'ttttttt~
4 Practical Wireless, October 1987
www.americanradiohistory.com
IC-3200E, Dual-band transceiver.
If you are a newly licensed
or Just undecIded about whIch band
to first operate, then the reOM
IC-3200E IS Just the answer. This is a
dual-band (144-146/430-440MHz)
F. M transceIver ideally sUIted for
the mobIle operator. The rC-3200E
has a built In duplexer and can
operate on one antenna for both
VHF and UHF, and wIth 25 watts of
output power on both bands (the low power can be adjusted from 1 to 10 watts) you can never be far from a
contact whether sImplex or 2m170cm repeater.
The rC-3200E employs a function key for low Priority operatIons to sImplify the front panel and a new
LCD dIsplay which is easy to read In bright sunlight, 10 memory channels will show operating frequencIes
sImplex or duplex, and four scanning systems memory, band, program and priority scan.
IC-4BE, 70cm.
FM Mini-mobile.
This NEW 70cm band transceIver IS so
small that it WIll flt almost anywhere In your
vehIcle or shack Power output IS 25 watts or
5 watts low, the IC-48E is supplied complete
with an internal loud-speaker. The large front
panel LCD readout IS deSIgned for wide-angle
viewing wIth an automatIc-dImmer circUIt to control the back lighting of the dIsplay for day or night operating.
The front panel of the IC-48E IS straIghtforward to make mobile operation safe and easy. The IC-48E contains
21 memory channels with duplex and memory sklp functIons. All memories and frequencIes can be scanned
by uSing the HM15 hand mic prOVIded.
IC-48E optIons Include the PS45 13.8V. 8 amp power supply, SP8 and SP10 external loudspeakers,
HSI5/SB mobile flexible mIcrophone and PTT sWltchbox.
Why not try 70 cms as a serious alternatIve to the 2 metre band, you mIght be amazed at what can be
achieved. For more mformatlon contact us or your local ICOM dealer.
ICOM have introduced a range of test meters for the radIO amateur. These new models would be a useful addItIon to any ham shack.
The DM 10 IS a digItal pen type voltJreslstance meter. The LCD display shows measurement In the range, DC volts 0 I mY -500Y, A C volts
ImY-500V. ReSistance 0.IOhm-20M ohm. Its small size (21 W x 31H x 161L) makes It an Ideal handheld test meter.
The DM20 IS a digital pocket type voltJ
resistance meter. The large LCD display shows
measurement in AC and DC volts ImY-450V. and
resIStance 0.1 ohm-200K ohms. This test meter IS Ideal
for portable use, its sIze (51 W x 106H x 10D) making It
a useful piece of eqUIpment to carry In your pocket.
The DM500 is the top of the range digital
meter. The large LCD dIsplay shows measurements
in the range, DC volts 0.lmY-1000Y, AC volts
lmY-750V. ResistanceO.1 ohm-20Mohms. DC
current 0.1u A -lOA This meter measures 70W x
14H x 34D and is ideal to cope with most
applications in your radIO shack.
_ _ I(OMl IIII MlIIIIII _ _ _ __
Practical Wireless, October 1987 5
www.americanradiohistory.com
1(-900 lupel' Mlul.iband
fMlI~.fem_
This new addition to ICOM's Ham radio equipment is a mulllband
FM transceiver system that allows the mobile operator to customIze a
communications system for hIs favourite bands. Up to 5 optional band
units can be installed with the IC-900 for instant access to a wide range
of frequencIes from the 28MHz HF band to the 1240MHz UHF band.
Only a small remote controller is necessary for control of all these bands.
A flexible optical fibre IS used between the Remote Controller and the
Interface Umt. The IC-900 has mdependant, full duplex capabIlity on all
bands, providing simultaneous receIve and transmit operation.
The function display on the Remote Controller shows two separate
operating frequencIes SImultaneously The IC-900 system transceiver
is equipped with 10 fully programmable
memory channels m each Band Unit.
The system can therefore store up to
50 different memory channels.
This revolutionary new concept in
Multiband operation is available from
your ICOM dealer. Also feel free to
contact ICOM (UK) LTD for assIstance
or informatIon. The IC-900 MultI-band
system consists of a Remote Controller,
Interface Unit A, Interface Umt B and a
series of specially designed Band Units.
UXl9 28-30MHz 10 watts
*UX59 50- 54MHz 10 watts
*(No mobIle operatIon allowed in UK)
UX29 144- l46MHz 25 watts
UX29H 144-146MHz 45 watts
UX49 430-440MHz 25 watts
UXl29 1240-l300MHz 10watts
I( fMl MIobile_
-t~t)t). ~Jt:m.
To complete the range of VHFIUHF FM
Mobiles thIS new model IS now available for the
23cm Ham band, It IS based on similar features
to the already eXlstmg IC-28E 2m and IC-48E
70 cms mobile umts. This Mim-mobile trans
ceiver will fit easily anywhere in your vehicle
or shack. Power output IS 10 watts or I watt low.
The IC-1200 is so new we do not even have a
picture of it, however, the large front panel LCD
readout is designed for WIde angle viewing and
front panel controls are straIghtforward to make
mobile operation safe and easy. The IC-1200 is
a superb example of ICOM's dedication to
exploring new communication equipment.
www.americanradiohistory.com
b e r e t o f i D d
i D t b e
•
You can find IeaM Amateur radio in use throughout the world. Here in the
U.K. IeaM is available from an extensive dealer network across the country.
Just visit your local emporium and you will probably find that they are IeaM
dealers. Authorised IeaM dealers will provide information on the entire IeaM
range of Amateur equipment backed-up with good after-sales service.
If you are a licensed Amateur or short wave listener IeaM have a complete
product range from HF to Microwaves to suit your needs. Should you have
difficulty in locating your nearest IeaM stockist contact us at the address
shown at the bottom of this page.
Avon Glamorgan Nottingham
Booth Holdmg (Bath) Ltd., Bnstol. 02217-2402 Transworld Comms (Neath) Ltd. 0639-52374 R.A.S. Nottingham. 0602-280267
Berks. Gloucesten hire Perthahire
Anthony Richards Electronics Ltd., Ascot. 0990-20234 L_A.M. Electronics, Cheltenham. 0452-855339 Axdon T.V. Services. Penh. 0738-237453
StaffordJihire
Bucks. Hampshire MRZ Comms. Newcastle-under-Lyme. 0782-619658
Photo Accoustlcs Lld. Newpon Pagnell. 0908-610625 Farnborough Comms, Farnborough. 0252-518009
S.M.C. Ltd., Southampton. 04215-5511 Suaaex
Caithness Bredhurst Electronics. Handcross. 0444-400786
Highland High Technology. WICk. 0955-4695. Hwnbenide Southdown Radio Supplies. Eastbourne. 0323-639351
Fanthorpe Ltd., Hull. 0482-223096
Cambs. Surrey
Link Electronics, Peterborough_ 0733-45731 Isle of Man Guildford Communications, GUildford. 0483-574434
Itel (Island Telecomms) Ltd_, Douglas. 06242-21562 Marlborough Comms. Horley. 0293-775071
Channell.landJi
Radio & Electronics Services, Guernsey. 0481-28837 Kent Tyne and Wear
Wrentham & Company, Jersey. 0534-34499 Scarab Systems, Gillingham. 0634-570441 Alyntronics, Newcastle. 0632-761002
rCOM (UK) LimitedlRetail, Herne Bay. 0227 -369464 Warwickshire
Cheshire
A_J_H. Electronics, Rugby 0788· 76473
Hobbytronics, Knutsford_ 0565·4040 Lancashire
D.W_E lectroniCs, Widnes. 051-420-2559 West Midlands
Clwyd Video Electronics, Morecambe. 0524-418873 Ray Withers, Warley. 021-421-820 I
SMC (TMP), Buckley. 0244-549563
London Yorkshire
Derbyshire Amcomm Services Ltd., Acton. 01-992-5765 A.J. Hooker, Doncaster. 0302-25690
SMC Oack Tweedy) Ltd, Chesterfield_ 0246-453340 Dressier (UK) Ltd., Leyton. 01-558-0854 Derwent Radio, Scar borough. 0723-365996
Devon Radio Shack Ltd" W. Hampstead. 01-624-7174 DHaemwsebs uErlye cEtlreocntricosn,i CBsra. Sdftoorudrb. ndge. 00237844--839302026036
Reg Ward & Co Ltd" Axminster. 0297·34918 Meneyside S.M.C. Leeds, Leeds. 0532-782324
Plymouth Telecoms Services_ 0752-556559 ARE Communications, Earlstown. 09252-29881
Northern Ireland
Done! MGR Services, Birkenhead. 051-653-3427 George Moore ElectroniCs. Belfast. 0232-658295
Poole Logic, Poole. 0202-683093 MidLothian S.M.C. (N_I reland), Bangor. 0247-464875
Euex Scotcomms, Edinburgh. 031-657-2430 Tyrone Amateur Electronics. Omagh. 0662-42043
Arrow ElectroniCs, Nr. Chelmsford. 0245-381673 Norfolk Eire
Waters & Stanton, HocklE,y_ 0702-206835 D.P. Hobbs, Norwich. 0603-615786 Radcom ElectrOnics. Mldleton. Co. Cork_ 01035321-632725
Eastern Comms, Norwich. 0603-667189 Western Comms. Kilgolgan. Co. Galway_ 010353-96206
Yo~nget~atyouW:JUstbY:kmg '0~~ ~~~~
~
~/~ Q~/ Q~/ Q~/ Q~/ Q~/ Q~/ ICOM (UK) LIMITED
up the telephone Ourmatlorderdepanment
' offers you free same day despatch whenever ,.... ~ I"'" ~ I"'" ~ I"'" ~ I" ~ I"'" ~ Dept PW Sea Street
'"~ possible, mstant credit, mterest free H P V ",V ",V ",V ",V ",V
'". Barclaycard and Access faclhty 24 hour ~''''~'~'~' ".~'". Berne Bay, K, ent CT6 8L, D.
, ~Lanswerphoneservlce ~ ~ , , , , ,
~' V DgtcPQst V. • • • • Tel: [phone].
Practical Wireless, October 1987 7
www.americanradiohistory.com
South Plidlands C
SCHOOL CLOSE, CHANDLERS FORD IND. EST., EAST
SMALL ON SIZE LARGE ON FEATURES
FT23R & FT73R FT727R
* *
I,. * 144-146 or 430-440MHz * 144-146 & 430-440MHz
* Diecast solid chassis * 5W alP on 2m & 70cms
* 5W alP (With opt. FNB11) * 10 Memory channels
* 10 Memory channels * Large clear LCD display
6 Digit LCD display * One touch operation
One touch operation Computer capability
FT23R From £249 FT73R From £269 FT727R £425
TOP BAND TO 70CMS* TRANSCEIVER
*
* ALL MODE LSB/USB, CW, FSK, AM & FM
* All BAND Transmit, General Coverage Receive
* Optional VHFIUHF units (6M, 2M & 70cms)*
* 100% DUTY CYCLE (Key down CW for 30 mins)
* Built in AUTOMATIC ATU (One memory on each band)
Computer & Packet radio compatability
OPTIONAL ACCESSORIES
50/767 6M Unit 10W DiP £169,00 FL7000 500W PEP HF Linear £1600.00
144/767 2M Unil10W DIP £169.00 SP767 External Speaker £69,95
430/767 70Cms Unit 10W DIP £215.00 FIF232C Computer Interface £75.00
FT767GX £1550
RRP
inc. VAT
NOW EVEN BETTER!
*
* All Mode SSB (USB -I- LSB) CW, AM & FM
* All Band Tx (General Coverage Rx)
* 100% Duty Cycle (100w CW, FM 25w AM)
* Pushbutton mode selection
* Switchable VFO steps (all modes)
* New Notch Filter
* Dual VFO's and 10 Memories (Freq, & Mode)
Computer Compatability (with optional interface)
OPTIONAL ACCESSORIES
fP757HD Heavy Duty PS U £239 fAS-1-4R Remote Antenna SW .. £80
fP757GX Light Duty P S.U . . .... £69 fC757AT Automalic ATU .. £349
fL7000 500W Solid Slale linear Amplilier £1,&111
FT757GXII £969
RRP
inc. VAT
LEEDS CHESTERAELD BUCKLEY JERSEY N. IRELAND BIRMINGHAM AXMINSTER
SMC (Northernl SMC (Midlands I SMC (TMPI SMC (Jersey I SMC N. Ireland SMC (Binninghaml Reg Ward & Co Lld
Nowelllane 102 High Street Unit 27, Pinfold lane 1 Belmont Ganlens 10 Ward Avenue 504 Alum Rock Road 1 Western Parade
Industrial Estate New Whittington, Buckley, Cfwyd St Helier, Jersey Bangor Alum Rock West Street,
Leeds LS9 6JE Chesterfield Buckley (02441 549563 Jersey (05341 171167 County Down Binningham 88 3HX Axminster II'IC:t,
Leeds (05321 3!i0606 Chest (02461 453340 111-5 Tues, Weds, fri S-5 pm Mon-Sat 0247271875 B'Ham (0212371 Devon EX13 5NY
9-5.30 Man-Sat 9.3G-5.30 Tues-Sat 111-4 Sat Closed Wed 149716313 Axminster (02971 34918
9,3G-5.00 Tues-Sat S-5.30 Tues-Sat
Southampton Showroom open 9.00-5.00 Monday to Friday, 9.00-1.00 Saturday. Service Dept open Mon-Fro 9.00-5.00.
AGENTS: JOHN DOYLE, TRANSWORLD COMMS, NEATH (0639) 52374 DAY (0639) 2942 EVE DAVID STENNING, G4JA, LOUTH 0507 604967
BOOTH HOLDINGS, SALT FORD, BRISTOL 02217 2402 JACK McVICAR, SCOTCOMMS, EDINBURGH 031 657 2430
8 Practical Wireless. October 1987
www.americanradiohistory.com