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BULLETIN ISSUED BY THE NORTHERN ZONES OF THE P.0,BCX1010,
WIRELESS INSTITUTE OF AUSTRATLIA TASMANIAN DIVISION LAUN CESTCN,
TAS. 7250,
JULY
VOL, 1 NO. .3
REGISTERED AT G,P.0, HCBART
for transmission by post as
a Periodical., CATEGORY B, PRICE 5¢.
PAGE 1
"The Ham fraternity is the greatest in the werld".
I once heard this sald by a W operator to a VK7 prior to his departure on a
world trip. Doubtless the VK7 had this proven before he arrived home, From
experience [ endorse this remark, Hams are a friendly lot. They bar neither
colour, creed, nationality nor sex, They work Democrat or Commmist alike;
it's the common interest that coumts. .
A Ham in trouble draws help like ants around a honeypot.
The only place where there seems to be any difficulty is on the home front,
Possibly this is due to the fact that to be involved in the working of a
governing group, one must leave the shack and the operating bench and meet
and tal men to man., In the meeting room there are no restrictions on subject,
point of view or choice of language, People react in a different way under
di fferent circumstances,
The Wireless Institute is something that we cannot do without, even
if sometimes we think we could. Only by presenting a representative and united
front to the powers that be can we exist and enjoy the privileges which we
take for granted, If anyone doubts the wisdom of ‘this statement, try a half hour
discussion with our worthy federal councillor, 7EJ, on the subject. You will
find it most informative.
So, if the Institute is necessary, state Divisions naturally follow, and
Divisions do not run themselves, Few people rcalise the time and effort
involved in running a Division, It is unfortunate that the governing body
has to be remote from many of its members, and this is overcome by a comprori:.,
the ZONES, Herein lie some of our difficulties,
Let's be honest about it, There are tifies when the Zones feel neglected,
at cther times Division feels that Zones could be more co-operative, The
Division appeals to Zones for information and nothing happens, A Zone or a
member contributes or asks for something and is overlooked, These are
difficulties which should be aired and ironed out in a friendly menner.
‘Part of the trouble appears to be lack of support., Twisting the words
of a famous statesman let us say "Wever was sc ruch done in such a short time
by so few",
It behoves all members, I repeat, all members, to try to take an active
part in the Institute, We can all do scmething no matter how smell, It all
helps., You will get very little cut of any organisation unless you put
something into it, I speak from experience,
So why not take the coat off, pull up the socks and next time there is
something on, embarrass the Chairman with a mass offer by everybody present.
Don't leave it to the chap next decor, Try it for twelve ronths snd you could
be agreeably surprised,
VK7MX,
FAUDL£
.. The Northern Zone meeting was held on June 11th to a capacity gathering of
nerbers, New faces at the meeting included visitors TONY 74X and HAROLD 7MZ from
the North West and BRIAV 7RR fronm Hobart. Members were told that the publicity
carpaign to stimlate interest in the W, I, A. was proving very successful,
iso the equipment store turmover for the Mcnth was excellent (thanks to KEVIN -
7Z41). The president opened an appeal for Australis and donations of $12,00 ‘
wvere received, but we still need more, =~ What about it,
The evening concluded with two very interesting colour films on the
~mufacture of ICs and experimental werk with Lasers,
The next meeting will be Friday, 9th July. As Council will be paying us
~ visit, let's all tum up and nake their visit one to remember, Also, we are
m.u:.nstitutlng supper: the idea being that you brlng a platel
I3 K R
CONGRATULATIONS to BOB7ZRF and XYL, MARGARET cn the arrival of a Beby girl,
b bow qualifies for membership to the "Wappy and Diaper changing Union",
PIEHKR
eI
HAVE you seen any U,F.0.,s with the markings VH7-DK or VH7-ZMH, Well they
are radio controlled and belong to DEN and MIKE so please fellows no trans-
i ssions on 11 meters,
. . . Fe R K IR INNR
TROUBLE
Did you think you were the only one to have trouble, D.C.A.'s navigational
buacor; is almost impossible to keep on the air, it keeps going off! Doesn't it
Foter
) 3K}H
Saw LINDSAY 77LD pushing his car, he tells me the battery keeps going flat,
scens he's forgotten there is a switch on the 1674, But if it's on that mch
ew come we don't hear you mate? :
N
3R}/
JOE 7ZGJ has had his share too, he connected the battery to his 2M, M
crphone the wrong way round and these little FET fellows didn't like it|
3633 RN
MAD how's this for trouble:
Scems this chap had an electronic implant contrelling his bladder outflow,
triggered by a handheld Radio wnit. Unfortunately it was triggered by a
ncerby Police car Radic - the occupants of which promptly arrested him for
zciling the pavement)!
F I K ;
REG 7KK in the news again, Neighbcur who is hard of hearing listening to
hics trensmissions on 24 AM with her hearing aid, Don't go to SSB Reg. she
1wy ask you te install a B.F.0. in the darned thing and that's a heck of a jobl
369636 HI N
NEW GEAR
PETER 7PD now the proud ouwner of a FLL 1000 Linear, More QRM!
BILL 74K using a 40ft. aluminium fishing pole as a vertical on 40M.
CHRIS 79X had a team of men pushing a new tower up for him, I wonder
what will go on top, HF or VHF{
ROBIN HARWOOD now listening on 2 and 6 meters with his new VK3 converters,
HEARD MALCOLM 7ZMS portable on Mr, George working scmebody on Ch,B, Good
thing hope to hear mre of you Malcolrn,
3
BILL 74X working on OE8 on 40M no doubt on the vertical,
I
DRY 7DK working fellow Tmswegian DOUG 7AZ Porteble Willis Island, new
comtry DENP?
e
JOWN 7JV working JIM ZM7:G on Tokelaus - that was definitely a new onel
FK
That's it fellows use them, and keep them and keep TASSIE on the Mapl
NORTH WESTERN ZONE
on the flrst was well attended including 7JV and
OQur June ngetlng
7ZiH frcn the North, Great to have them with us, A number of irportant
Zone matters were dealt with embracing membership, fees, etec, and con-
clusicns reached which it is.believed will benefit the Zcne A compre-
“hensive lot.of eqmpnent received from H.Q, was displayed and some taken up,
Following the meeting a lecture was given by 7MX on construction of
ve;rt_lcally polarised antennas for heme and rebile use,
As our ‘store is now in posse531on of cheap fibre glass rods, no doubt
there will be some 5/8 lcaded whips in use shortly,
. Two teter net activity is still thriving in the‘area, this being ideel
for across town commnication, Long technical dlscussmns are often heard and
scne 1n'tlcr<,_st1ng rail reading is to be had,
One thing overheard was some work on 6 metre equipment going cn between
7LH -and: 7ZGR.
Stations likely to be heard are MM7Z, 7LH, 7AX, 7ZBE, 7ZRG and TMX and
~occasionally robile visitors,
7PD was contacted recently passing through and judging by the rapid
fade cut of his signal he was in a hurry.
There's one, thing about the FM net, 11: doesn't take 400 watts PEP to
talk across town,
7LH has a welrd and wc‘nderfularray up the stick ahd it's working very
well,
™Z staggcred off towards Port Sorell the other day with a load cof cards
for 7B, F.B, Ian, you are certainly keeping us on the mapl
. Prior to our mcctlng 7AX was proudly displaying some weird patterns
on aTV screen,- They appeared tc be coming frem'a black bex on the bench,
A word of warning to visitors, den't splll ash on Tony's pile carpet,
it's hard to pick up!
Saw Brian 7ZBE with a rost interesting visiting card the other day, He's
up to sorething for surel
Harold 7MZ is still experimenting with the X beam on 14 M/H2,
Ken 7KH recently atterided & Japeanese party of some sort in the midlands,
Apparently there was scre strange talk and traditional Japanese food, . Ken
carme hore full of it, £Ah so Ken,
NEXT mecting JULY 6th end ALL WELCOME,
A prorinent nember of the Nerth West Zene is in possesgsion of THE SPOCN
,
Tt has been decided to cxtend its field of act1v1t1es to the Northem Zene.
Snies are active - so be warned,
PRI KN
COMiN G EVENTS
JULY 6th ~ NORTH WEST Meeting - La-in's Hall, Ulverstcene -
lecture by BRIAN 7ZBE cn db,
JULY 9th NORTHERY ZONE Mceting - Council visit and talk
by 7PF on Ecuipment required fer A.Q.B, =
A E.B. Reems, 51 York Street, Launcesten,
JULY 10th
LRI Council Meeting at F1re Br:.gg.deH Ce, Devcnport -
© start 10530 a.rh
JULY 1st - 31st Winter V.H.F, Contest VK8AH - Details April A.R.
JULY 3rd & 4th 7L Memcrial Ccntest €M cnly (gecd practise for R, ..’
AUGUST 14th & 15th R.D, Centest, (Remember your log is required
if we arc to win ‘the trophy).
THERE IS a VK7 Round-up every Wednesday 7,30 p.m, on 3670 KHZ,
How about jeining in,
FAUL 4
MT, GAMBIER CONVEN TION
Five VK7's would rate the 12th and 13th June as a weekend well spent, .
. Pilet STEVE 7SR, Co-pilot DAVE 7ZDV, JOHN 7JV, KEVIN 7ZAH and REG 7KK cropped 3
in on the 7th South East Radio Group "Do!" during the ronth, .
It scems remarkable that the 7 local hams (and their XYL'S) can put on such a
geod turn attended by 65 Hams and others from Adelaide to Melbcurne and beyond,
Rether a different show than we are used to, Mcst participants stayed in local
VMotels (imagine 25 crammed into a single Motel Room swapping "exploits! until
the wee snall hours),
For a mere $5.00 registration fee, meals (an understaterent) were thrown
in 2t the convention centre, a Hall on thc outskirts of town, Cabarect
cntertainment occupied one evening, Sunday was filled by a definite prograrme
of scrarbles, sniffer fox and transrmitter hunts - 6 in all,
I guarantee the locals rust have thought the Martians had arrived judgning
by the ridiculous antennae some people insist on loading on tc their cars,
They take it seriously toc., One VK3 had his callsign printed in 1 ft, high
l1cotters on the side of his car and his super hunting antennae nakes 3AVW the
“we of the foxes throughout VK3 and 5, '
You need to be on the ball, The sniffer TX was in,what appearcd to be a
contcstants')pocket. The 2 TX was buried in the _ Pifth row of pinc trees
in a plentation switched on and off by rerote control, These cvents yielded
~rout 15 prizes, so many in fact that even KEN 3ZAVJ and DARRYL 3 AQR managed to
set one,
The major gain from such a weekend,of course,is the fellowship ond exchange
cf ideas one obtains with these who ere ctherwise just names and callsigns,
The only rermaining question is ~ why can't we run a show like this in VK7,
REG 7KK
: v , L oa
> WU UN K
FOR SALE
Eicc 753 3 Band Tranceiver, (80, 40 and 20) with matching power supply 751. $180.00.
This wnit can be heard cvery Sunday rvrning, as it is used for the 7WI Broadcast s
cnn 80M, TFull details frem TOM MOORE, 7R, 23 McGuinnecss Cres, LINMAH VALLEY, TAS,7007,
3363
CODAR AT5 riniature (apprex, 9"x5"x4") MM/CW transmitter 12 watt 160/80 rcdificd
for AOM. 3% %
240V AC power supply C.TU,
127 DC P,S, and Rercote C,U. g
SWR Meter, dwry load A.T.U,, R.F. power meter - The 1ct — $80,00,
N
TYPE 4RF jeyratch ATU with RF power meter 160/10M - $5.00.
eI
2 Elen, M bean - %3,00, 4 Elen /M bean -~ $2.00,
FULL DETAILS From : BOB TROTT 7MT, 186 Punchbewl Read, Launcesten, Ph,441392,
HORI R R KRN
ZONE FEES
Thesc are now due, Ncrth and Neorth West Zene rembers - rererber your zenc
vrevides many of the facilities availeble in Hebart — help it by sending your dellioxr.
Comnlete the fernm below if you'rc unfinencial,
O, TO
Verthern Zene, W.I.A, Tas., North Westzene W.I.A, Tas.,
P,0. Box 1010, P.0, Bex 12, :
LATN GESTONT, LAST DEVONPORT,
~4ido 066 0006060090000 000600000060800600000008006005066006600000O0 -ALoooaaoooennoonoaoococv.
""DJf‘ESSOGOGOQOOHDOBUOOHJflaoflo&ofi.lflflofioueanooflfleoaono-coo09006560500000000000000L\our
0
© 000000060050 0000©6006000006060600000306000060008§065050000®800000GC0e@060606000000000000006000C30.
Q. R. l\{.
BULLETIN OF THE NORTHERN ZONE W,I.A....JULY,1971,
PAGE S
PROJECT MOQURAY
MOONRAY'S primary purposc is tc serve as a free~access UHF repeater for
world-wide line-of-sight amateur corrunication and cxperimentation within
the Intermationally allocated 70 cm (432MHz) band, A secondary function will
be its capability to secrve as an cmergency back-up veice corrunication link
for our Astrcnauts in the event of an unlikely (but possible) breakdown
or failure of their rcgular corrmumications syster, MOONRAY can also be
uscd as & landing-site relccation beacon for homing-in on the site at some
later date, If the laser experiment is successful, location accuracy will
be better than two fcet,
MOONRAY 1 will ccntain a highly sensitive lownoise receiver, a signal
processor, an identifier, a timer-cycler-sequencer, six to eight channels
of telemetry, and a laser recciver with optics, Power will be supplied by an
isotope-fueled thermoeleatric generator having a half-life of 87 years,
Thermal contrcls, antenna, pcinting system and all auxilliary and ancillary
devices will be self-contained, The final cenfiguration of the flight
hardware package will be in the form of a louvered metal cylinder about six
inches in diameter and ten inches long, Three retractable (or folding) legs
will be used for supnort and levelling purposes, A special peinting mechan-
ism will be provided to insure accurate line-of-sight to earth when the
antenna is being pointed, The up-link frequency will be 439,9 MHZ end the
down-link 430,71 MHz, A 10 KHz passband on both links will accept all
rodes of modulation and/or transmission, Recomrmended modes (by order of
preference) are:
CW, FSK, MCW, AFSK, NBMM, SSB & AM
MONRAY'S call sign will be the identifier SS in Morse code (eee oes)
transmitted every ten minutes elong with a telemetry sequence, Translator
(repeater) operation will be on a 24~hour per day continucus-duty basis
with cnly onc minute interruptions each ten minute peried,
Amateur ground-stations should have high.gain, (15 db, minimumn)santennas
capable of tracking the moon; low-ncise (3db, mexinmun) 430,1 MHz crystal-con-
trolled converters and stable, tunable IF's (a grod corrunications receiver).
Transmitter power estimated adequate for Cw use abcut 50 watts cutput on 439.9
MHz, More power will be needed for cother modes cf operation, progressing
from 100 watts for FSK tc a Kw for slow~scan TV, ’
FE3EH IK
I _OF K
This station has now been in cperation for 12 months, In that time
contact has been made with 34 ccuntries of which 22 have been confirmed,
Contacts have becen made on 15, 20 and 40 meters S.S,B, using an FIDX100,
home brew linear and 20 end 40 meter dipcles, The station has had some
very interesting QSO's with other schcool club stations, scme of them being:
VK3BBY SHEPPARTON SQUTH TECH,
VK3BHT BOX HILL BOYS TECH,
VIA VK3AUH CASTLEMAIN TECH
VK3BDB GEELONG GRAMMAR SCHOOL
VIA VK7ZX LAUN CESTON MATRIC,
VK3API MELBOURNE PMG TRAINING SCHOOL
VK3AT™ MELBOURNE UNIVERSITY
ZM2AKP ST, PATRICKS COLL, (WELLINGTON)
VK2AXK WAVERLY COLL.
VK1DH DEAKTN HIGH
The club cperates Tuesday to Friday 12.30 - 13,00 E,S.T. and
Wednesday 15,30 = 16,00 Operation is mainly on 40 meters althcugh we
are likely to be found on 20 or 15 meters if the band is open, The club
now also has a 2 neter F,M, wmit on Ch, B. on which sore local contacts
have been made,
for our Astrcnauts in the event of an unlikely (but possible) breakdown
or failure of their regular corramications system, MOONRAY can also be
used as a landing-site relocation beacon for homing-in on the site at some
later date, If the laser experiment is successful, location accuracy will
be better than two fecet,
MOONRAY 1 will ccntain a highly sensitive low-noise receiver, a signal
processor, an identifier, a timer-cycler-sequencer, six to eight channels
of telemetry, and a laser receiver with opties, Power will be supplied by an
isotope-fueled thermoeleatric generator having a half-life of 87 years,
Thermal contrcls, antenna, pcinting system and all auxilliary and ancillary
devices will be self-contained, The final configuration of the flight
hardware package will be in the form of a louvered metal cylinder about six
inches in diareter and ten inches long. Three retractable (or folding) legs
will be used for support and levelling purposes, A special peinting mechan-
ism will be provided to insure accurate line~of-sight to earth when the
antenna is being pointed, The up-link frequency will be 439,9 MHZ and the
down-1ink 430,71 MHz, A 10 KHz passband on both links will accept all
rodes of modulation and/or transmission. Recorrended modes (by order of
preference) are:
Cw, FSK, MCW, AFSK, NBFM, SSB & MM ’
MOONRAY'S call sign will be the identifier SS in Morse code (eee ess)
transmitted cvery ten minutes elong with a telemetry sequence, Translator
(repeater) opcration will be on a 24-hour per day continucus-.duty basis
with only onc minute interruptions each ten minute pericd,
Anateur ground-stations should have high-gain, (15 db, mininun)eantennas
capable of tracking the roon; lowncise (3db. meximun) 430,1 MHz crystal-con-
trolled converters and stable, tunable IF's (a grod corrunications receiver).
Transmitter power estimated adequate for Cw use abcut 50 watts cutput on 439.9
MHz, More power will be needed for other modes of operation, progressing
from 100 watts for FSK tc a Kw for slowscan TV,
R KNI
VE7MKCLUBSTATIONOFKINGSMEADOWSHIGHSCHOOL
This station has now been in cperation for 12 months, In that time
contact has been made with 34 countries of which 22 have been confirmed,
Contacts have been made on 15, 20 and 40 meters S.S.B, using an FIDX100,
horne brew linear and 20 ond 40 meter dincles, The station has had some
very interesting QSO's with other school club stations, scme of them being:
VK3BBY SHEPPARTON SOUTH TECH,
VK3BHT BCX HILL BOYS TECH,
VIA VK3AUH CASTLEMAIN TECH
VK3BDB GEELONG GRAMMAR SCHOOL
VIA VK7ZX LAUN CESTON MATRIC,
VK3APT MELBOURNE PMG TRAINING SCHOOL
VE3ATM MELBOURNE UNIVERSITY
ZM2AKP ST, PATRICKS COLL. (WELLINGTON)
VK2AXK WAVERLY COLL.
VK1DH DEAKTN HIGH
The eclub cperates Tuesday to Friday 12.30 - 13,00 E,S,T, end
Wednesday 15,30 = 16,00 Operation is mainly on 40 meters although we
are likely to be found on 20 or 15 meters if the band is open, The club
now also has a 2 meter F,M, wnit on Ch, B, on which sorne local contacts
have been mnade, .
Operators during the past ycer have been PETER HODGE, PETE SZOKA, RODNEY
MIINER and GRAEME REARDON all under the "EAGLE EYE" of REG VK7XK,
Club rerbers are also ¢ngaged in ccnstructing varicus projests, sone
af them are: crystel sets, one transistor and reflex sets, sirens and
Low wltage regulated and variable power supnlies, These prcjects are
C.R.M,
BULLETIN
OF MORTHERY ZCONE W,I,.A. TAS....JULY,
1971
PAGE 6
port of the qualificaticns in Y.R.C.S. of which this club is a mermber and
scre of the members have already gained their certificates,
The Club may be centacted by any station wishing tc make a sched., with
cny of its rmenbers fer the abeve tirme at: o _
P,0. BOX 49, v
SOUTH LAUNCESTON. 7250,
FEIH I AN AWK
LEN VK7BQ dcsircs me tc convey his sincere thanks and appreciaticn
fer all the good wishes received frem Louncesten, Hebart, N, W, Coast and
Victeria cn the cccasion of his birthday, Len says it is very hcartening
te hear from so meny rererbrances cof early deays of Radio,
. 333 B33
3 KK
7o TwE L piroR:
Dear Sir,
As a ncweermer te W.I.A., having previcusly been a rerber of R.S.G,B.,
I have recently received the last twe copies ¢f €. R, M, and nctice you
have been seeking ccrrments, As yet I have nct attended any local nmeetings,
serething I hope to rermedy in the near future, and think it fills the gep
fer sercone in vy pesiticn whe knows few leoeal amateurs, yct likes te keep
o with events and persenalities,
Yeurs faithfully,
BOB TROTT, VK7MT,
3¢ 3 FH I I3 30303
CGUESTION: Is an amateur permitted tc use two way apparatus on the citizen
band under his current license, or is a special permit requircd, 7LH,
[A'SWERs Mn fnateur Lic. sc allcws the cperater the use of 2ll anatcur bands
within the lirits of his license,
In /fwstralia the citizen band extends from 27,230 MHz up and cperaticn
e .
within this band rcquires a scparate licensec,
h
A point werth rentioning is thet therc is an amateur band fron 26,060 lVHz
which you mey use uncder the terrs of your licensc, Howcver, in scnmc countries
this band is used as a citizoen band and an amcteur nay exchange ressages only
with cther awateur staticns he is not allowed tc cngape in QS0 with citizen
bend cperators,
7V,
FE IR KKK
Dcar 0.M,
Orng:’r'atulations cn the new Bulletin - althcugh T usually listen tc the
Sunday breoadecast, the written word can be referred tc a second tire, I enclese
snall denation in arpreciation.,
Pericdically, we read varicus articles on antenna for the licenced ham,
Wevld it be pessible to print a shert para cn the best general purnosc antenna
fer the average receiver, I an using a Lafayctta HA-225, If not, cculd you
suggest the best handbece's covering this subject,
73's BOB JACKSON,
THE CHOICE OF AN /NTHVNA is usually a matter of perscnal prefcrence and lccaticn,
There are hcwever, a nurber of impertent consideraticns, If you cnly listen on
[rateur Bands your best bet is en antenna which is res. nant en ycur faverite
bend or bands e,g., the G5RV (R.S.G.B, Hendbeek) which covers the 5 bands fron
017 te 10M, Alsc the rulti bend dipecle or trap dinclc cculd preduce geood
results, I you are intercsted in general coverage then I would suggest a
lcng wire, as leng as possible and as high as peossible with cne cf the three .
~ A Arrw
4 e oe - —— mwean oo
LEN VK7BQ desires ne tc convey his sincere the
fer all the good wishes received frenm Laumcestenm, &:hai‘t,
Victeria cn the cccasicn cof his blrthduy. Len szys it is very
te hear from so meny remerbrances cf early days of Radic,
FRFFRFFIHHRK
fr; THE £ DTOR !
Dear Sir,
As a newcerer te W.I.A,, having 3rov1rusly been a rerber of R.S.G.B.g
I have recently received the last twe ccpies o¢f €. R, M, and nctice you
have been seeking ccrments, As yet I have nct attended any local rmeetings,
scrething T hope to rermedy in the near future, and think it fills the gap
fer sercone in vy pesiticn whe knows few lcoeal amateurs, yct likes te keep
u» with events and perscnalities, v
Yeurs faithfully,
BOB TROTT, VK7MT,
3¢ 3 6 H 3 3 3303
K
GUESTION: Is an amateur permitted tc use two way apparatus cn the citizen
hand under his current license, or is a special permit required, 7LH,
[TSWERs Mn fmateur Lic. sc allows the cperater the use of all anatcur bands
within the 1imits of his license,
In fustralia the citizen band extends from 27,230 MHz up and cperaticn
within this band rcquires a scparate license,
4 point werth renticoning is that therc is an arateur band fron 26,060 VHz
which you mey use under the terrs of your licensc, Howcver, in some countries
this band is used as a citizon band and am amatour may exchange ressages cnly
with cther awateur staticns he is not allowed tc cngape in QSO with citizen
band cperators,
7TV,
IR RRNFH
Dcar 0.M,
Orng;-atulations cn the new Bulletin - althcugh I usually listen tc the
Dinday broadcast, thc written word can be referred tc a second tirme, T enclese
© snall denation in arpreciation,
Pericdically, we read varicus articles on antenna for the licenced ham,
Wievld it be pessible to print a shert para cn the best general purpcse antenna
frr the average receiver, I an using a Lafayctta HA-225, If not, cculd ycu
suggest the best hendbee’s covering this subject,
73's BOB JACKSON,
THE CHOICE OF AN ANTENNA is usually a natter of perscnal prefcrence and lccaticn,
There are hcwever, a nurber of impertent consideraticons, If you cnly listen on
[rateur Bands your best bet is an antenna which is res. nant cn ycur faverite
bend or bands e,g, the G5RV (R.S.G.B. Hendbeck) which covers the 5 bends frem
01 te 10M, Alsc the multi bend dipcle or trap dinclce could produce good °
results, If you are intercsted in general coverage then I would suggest a
lcng wire, as long as possible and as high as pessible with cne of the three
feed systems te your sct,
1o A single wire feed frem the ond of the acrial
2. A twin wire fced (e.g., TV Ribbcn) ecither ond cr centre feed,
3. . Bither cf the abrve but with an acrial tuning nctwerk between the
feed and the receiver,In all cases a good earth is required, 77X
Q. R‘ M.
BULLETIN OF NORTHER! ZONE W,I,A. TAS..,.JULY,1971
PIAGE 7
EQUIPMINT STORES
The Northern Zcnes cquiprent store sales are still well up. Equiprent
tc the valuc of approximately $100,00 is held in stcck centinucusly,
¥
The items marked # arc alsc available frcnm the Ncrth West Zcne, prices
Ge
may vary slightly due tc pcstage,
Nerthermn Zene Contact: KEVIN HENRICKS, 8 Clarendon St. Youngtown.,
PHONE ~ Heme 489772 or Work 321208,
North-West Contact: HAROLD HANCOCK, 7MZ, 6 Highview Cres, Dewcnport,
PHONE -~ Heme 244784
# 213055 1.60 ca.
213563 0.60¢ "
¥ 23564 0.60¢ "
213565 0.60¢ "
SE1001 0.30¢ "
. 1637 0.15¢ ®
A1406 0.15¢ "
1408 O.15¢ "
MPF102 JFET 0.50¢ "
MPF121 MOSFET 0,904 "
140 VOSFET 1,904 "
v % N5245TiB88JFET 0.90¢ " (this pricc mey go up to $1.30 due tc custens)
% 2N3819 JFET 0.70¢ "
MC1550G LC. R.F, I.F, AMP, $1.30¢ ea.
IM378N I.C, Audio Squelch & A4,G.C. $4.00 ca.
EM/0® DIODE CO P.I.V,1arp, 0.50¢ "
10 MFD 65 VW Non Polarised Capacitorse10g "
9V Zener Dicdes, 340 nw 0.,40¢ ©
470 PF Button Bypasses 0.50¢ "
' 047-6 PF Trirmers Ceraric 0.25¢ "
1 1459 PF PTFE Tri~mers 0.25¢ "
1.5=-12 PF PTFE Trirmers - 0.25¢ "
¥ NECSID FORMERS 0,05¢ "
% SLUGS F29 and F16 0.04¢ "
¥ SINGLE CANS 0.07¢ "
% DOUBLE CANS 0,08¢ ®
XTAL SCCKETS D type fer P.C.B. 0.,20¢ "
PACK OF 5 VALVES 1-6A K&2_6AU6
2~6BA6 1.00¢ "
B/Lee Coax Scckets for P, C.B, 0.20¢
RESISTORS +W Individual Values 0,04¢ "
% Relays 4 Changc over centacts
12V Miniture 2.50¢ M
# Socket for Relay O 45¢ v
B/Lee standard .scckets 0,25¢ "
; B/Lee “Alum Plags = - : 0,30¢ "
* W,I,A, Car Transfer 0.15¢ "
* QSL Stickers, Shect of 40 0.50¢ "
¥ Fibre Glass Blanks for Mini-whips
and 5/8 2M whips 1.50¢ "
T.C.A, 1674 Circuits 0.50¢ "
Handbooks AWA MR=-20B FM Carphcne 0,50¢ "
% Call Becks 1971 0.95¢ "
¥ Log Bcoks and Alr Dux Ceils
THE FOLLOWING ITEMS ARE STOCKED BY NORTH WEST ONLY:
MR2P Mcter 1MA $5.,00¢ ea,
" " 50 Ua 4,20¢ M
VMAT WMTADADIIARN They
T
Ncrthern Zone Contact: KEVIN HENRICKS, 2 Glatu!h ,
PHONE - Hcre 469772 cr Work 321:1:8.”
North-West Contact: HAROLD HANCOCK, 7MZ, 6 Highview Cres, Dewcnport.
PHONE - Home 244784
* 23055 1.60 ca,
A1 3563 0.60¢ "
# 2N3564 "
0.60¢
13565 0.60¢ "
SE1001 0.30¢"
- AN1637 . 0.15¢ "
AN406 0.15¢ " .
2408 0.15¢ "
MPF102 JFET 0,50¢ "
MPF121 MOSFET 0.,90¢ "
W40 VOSFET 1,904 " |
v % N5245TiB8&IFET 0.90¢ " (this pricc may go up to $1.30 éue tc custems)
* 23819 JFET 0.,70¢ " :
MC1550G LC. R.F. I.F, AMP, $1.30¢ ea.
ILM378N I.C., Audio Squelch & A,G.C. $4.00 ca.
EM/0® DIODE 70O P.I.V,1arp. - 0.50¢ ™
10 MFD 65 VW Non Pelarised Capacitorse1O¢ "
9V Zener Dicdes, 340 nw 0.40¢
470 PF Button Bypasses 0.50¢ "
‘ 047-6 PF Trimmers Ceraric 0.25¢ "
1 1459 PF PTFE Trirmers 0.25¢ "
o e
1.5-12 PF PTFE Trirmers - 0.25¢ "
% NEQSID FORMERS 0.05¢ "
% SLUGS F29 and F16 0.,04¢ "
% SINGLE CANS 0.07¢ "
% DOUBLE CANS 0.08¢
XTAL SCCKETS D type for P.C.B, 0.20¢ "
PACK OF 5 VALVES 1-b6A K& 2.6AU6
2~6Bk 1,00¢ "
B/Lee Coax Scckets fer P, CuB, 0.,20¢
RESISTORS $W Individual Values 0,04¢ "
¥ Relays 4 Changc over ccntacts
12V Miniture 2.50¢ "
% Socket for Relay Ood5¢ M
B/Lee standardscckets : 0,25¢ "
: B/Lee‘Alun Plugs =~ - : 0.30¢" M
# W,I,A, Car Transfer 0.15¢ "
¥ QSL Stickers; Shect of 40 0.50¢ "
# Fibre Glass Blanks for Mini-whips
and 5/8 21 whips 1.50¢ "
T.C.A. 1674 Circuits 0.50¢ "
Handbooks AWA MR-20B FM Carphcene 0.,50¢ M
% Call Becks 1971 0.95¢ "
¥ Log Becoks and Air Dux Coils
THE FOLLOWING ITEMS ARE STOCKED BY NORTH WEST ONLY:
MR2P Mcter 1MA $5,00¢ ea,
" " 50 Ua 4o 20¢ "
XTAL MICROPHCNES 1,10¢ "
LARGE RANGE OF FORMERS, BASES SLUGS, CANS & CUP CORES
Q. R. M,
BULLETIN OF NORTHERN ZONE W.I.A. TAS.....JULY, 1971,
PAGE ©
HELICAL ANTENNA FOR 70 CM
In the previous @ RM it stated the pessibility of the launching of 3
Repeaters in the one space shot, As two of these Repeaters use the 70 (M
Band, the problen arose as tc what type of antenna to use for space X
comrunication,
With the following considerations it was decided to construct a
6 turm Helix,
(a) Could be easily duplicated by other amateurs
(b) Built from locally available compcnents
(c) No corplicated matching devices o
(d) High gain 12-13 db with good bean width 50
(e) Circular polarizaticn
The materials used to ecnstruct consisted of érm Pyrotenax cable for the
helixs 22 gauge sheet metal for the greund Plane (galvanized iren);
3/4 inch PVC conduit and 2 tee fittings for the helix supnort; 6rm Pyrctenax
saddles and cadriun plated self tapping screws,
The fcllowing dinensions were calculated for 432 MHz:s
GRound PLaNE
4.4 cn
< 5/'/3 < biam. % Conbduir 38 JneH
20 Jy I1MCH
T
/18,1 €r
778 iNcHf
COMDUILT
TEE
SPACING FRom GRound PLANE
/ 74 M 273 iveH . PyRoTENAR
%WAVE STug / 5APDLES
S
COAR 750 Y8biam
tem N\l
P INCH g = 18.8 <™
53/4, INCH SPACE BETWEENY TR NS :
S0 L
J4. 5 M
Conx SolLbER
BRAID To | s J/Ar INCH
GRou N PLANE
The Pyrotenax cable can be first wecund on a 1 gallon paint tin, then ,
R e
transferred to the supports, The cable is held in placc by the saddles and '
self tapping screws,
If o nmatch to 75 ohn cable is reguired a 11,24 cn length of 75 ohm cable
(d) High gain 12-13 dd «ithmod beemy
(e) Circular polarization o ; TP e
The meterials used to ocnstruct ccnsisted of Gon Prrotensx cabile T the
helix; 22 gauge sheet metal for the grcund Plane (gzlvenized ivem)s
3/4 inch PVC conduit and 2 tee fittings for the helix supnort; 6o Pyrctenax
saddles and cadriun plated self tapping screws.
The fellowing dimensions werc calculated for 432 MHz:
GRAuUNDd PLANE
9.4 cm
e— 451.3 cm
DiAM. % ConbDuir 38 v
20 Vo 1 NCH
COMNDUIT
SPACING FROM GRound PLANE
/ T4 CM 273 INCH e PyRoTENAR
% WAVE $1uR s / SAPDLES
COAR 750 Ygbian] ‘ X 7 N——7
1.4 cm DiAm
7;,«185:‘1;
L/yz {MCH
500 53/4 INCH SPACE RBETWEEN TLRNS :
/4.5 €M
COAX solper s Y '
BRAID To ?oADEs
GRou D ?LAI\IE
The Pyrotenax cable can be first weund on a 1 gallon paint tin, then
transferred to the supports, The cable is held in placc by the saddles and
self tapping screws,
If a2 match to 75 ohm cable is vequired a 11,4 cn length of 75 chm cable
3/8 diem, .- rerove the centre conductor end replace with a piecc of
20 swg (0,036 dian,) copper wire,
COL 7KW