SKM C450i24093016150
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THE \N I RELESS^J^NSTJJUTE
OF AUSTRALIA
TASM AN I AN DIVISION
BOX 851J, &»P<0., MOBAP.I
SEPTEMBER 1953 MONT-HI. Y BITLLET3T PRICE CB.
TKE^URETL SEC.RSI.ABY
PRESIDENT
Mr« C. Hs-rrisson Mr» K. Spiegel
Mr. T. Allsn
VIC/CH VK7KS
VIC7AL
Registered at G-oP. O., Hobaz-fc, for •fcransi'a. ssion Toy post as a periodical.
GENERAL_№EC_ING, > .
'?hT^;:r- monthJy meeting of -fche Division ULII be held_in -fche Club Room,
147 Liverpool 3-breet, Hobar-b, on k'EDNESDAl, 4th September a-b 2000 hours. The
lecture \. &11 be gLven by Mr/Rick Qumley ^.TM'S and his subject "Log Periodic
Aerials for Aiiiateur Use",
N№2H_№^EmLZCTiR- . . ^. _ . .. /.. „ , ,,, ^^^.
"fi'^Tt'h^T^nual MeetinE of this Zone held on 6th August the following
Office bearers were elected fox- -the coining year s
Presidents №» D, H. Waldono W7DA
Vice Presidents s Mro K. Saxono VK7AI
Mr, M. Ives. VK714X
Secretary? Mro G. Groves. VK7XL
Treasurer: Mr« M, lyes* VK.7MX
V, H. FeOfficer; Mr. W, Nickels*
Mr.
Zone Gorrespondoirbs Mr, H. Young. VK7ZBH
QSL Managed; Mr» G Groves, VK7XL
The next meeting w.11 be held at Lakins Hall, Ulverstone, on TUESDAY,
3rd September at 2000 hours^
Our Quo'ba NORTHEBN ZONE<
£200 The noxA oeeting of this Zoae w-U- bfi held at 102 Charles S-fcreet,
Launceston, on FRIDAY, 13-bh Sep-fcember at 2000 hoursg A lec'burevill. be
given }sy Mro J, Fors-bet VK7JF his subject being "Series^ted M&dula-bion"
Slow norse -branstaigsiony are now being made by VI^TDK on 144*06
Ms/s on Monday, Wednesday and Saturday evenings from 1900 to 1930 hours.
Den would apprecia-te reports on -bhLs and -the VK7WI robroadcast on the
same frequency on Sunday mornings.
I. _T. _U FUND.,
'T^lis month we acknowledge vi.th thanks donations towards the I«T»U,
Fund from VK7K&,, %7ZAO, VK7ZW and VKj2?BE (VK7ZBE). The -fcotal in hand
ia now £24-10- 3do
The'response -to date has been most disappointing and contri.tu-fcion&
aro far too slow ir. coning in. Probab3y a lot of us -think: -bha-fc -bhere^
is'plenty of tine yet and" just dontt get around to doing aryfcMng about
i'b/tart our objeot-ive iaust te •to try and gs-fc our quota as soon as
po^sitle, ' If we co^ld get a li-fc-fcle over SL from every inerabei-* or about
30s/" from evezy full' raenber we would be there, H" you are not one of
the -bhirteen who have alrsaity responded -to -bhe appeal IfflAT ABOUT DOING
S^SETHING ABOUT IS NOW,
Until we have the fu.nds in hand this is going to be continually
publj. cised in the BiOle-fcin and in the VlCT'iI Broadcast. One Division
has already put a le'^y on their members - we do not wan-fc to have to do
tha-b if possa. ble^ bu.1 unless we do be-fc-ber tl^an -we are at preseri-fc it will
have to be seriously consia.ered noxb yea re,
I. T. U.
FUND*
(1)
! The Month3.y Bul.Ie-bin of the VH.relesg In>rbitu+-e of Australia.
Page 2
September 1963 Tagaanian Di-vi^ion
Ru s
G<'^fco l?el^to hand and. all those who liave ordered one may ob-bain^h^ir
the^rmeelAngo7by contacting TCPOH^^We ^vo a/^ SPares, at 3^_
oop/ a-b
^LauThis Sll 'brt he&last-opport. unity"of obt. ining thorn a-b this special price,
Selectivity curves or useful design data for Aegxs^175 KC,I*F-_Tr^ns^
formers Type"jiro ji2,"Fac-bory records"no longer^y^ilable. Cotitact
r
fa-oudlockVKTBP, 63 Duke S-bree-fc, Sancty Bay. Ph. 2 64.57
•C!
.
We are sorry -to hear of VK7ZZ's accaden-fc and wish hlEi a speedy^ recoveiy.
He is Uksly"to be"in the"Royal Hobarfc Hospital for some weeks and would be
pleased to^e^^^go^a??hear -bha-b Mex Hubbard_TO7AX is in hospital }^^
T. Beliwe Ilex was" taken ill dming a trip to_New^Zealand ^and the Island
^id"ya^ conEned to'his bunk for raos-b of the tima. Bad luck, and wo trust you
w.11 be up and about again veiy soon OM. ^ ^ ^ ^
'If "anyone'is°-bald. ng their car_to &ydney at,at im^,and. would h^ve^^Ia
•bo bring back''9"bit of disposals gear please advise VK70.H^ ^cou:t:"^e^^
we wre"recGn-fc^- able to ge-b some'over at no cos-b to Johe Insii-bute for freight,
l^TJP. Tt^
r""" ""it'is'expected that Jack Batchler VK7JB ^11 a-btend a course at Mt. I'fecedon
during September as the represen-ta'bive of -bhe Divisiono
lum bers are . advj-sed tl^-b Gell'Books ^11 NOT be available tlirough the
Divisionthis'year, and they shouJ.d purchase -thsir copy from newsagents,
To be held early November and probably at the saae IpcaUon as last year "
near Gampbell Toyn/"Twlve members from the N. W. Zone have already, adv^-sed ^hat
t'hey iZli'"be~attendings and we anticipat'e a good roll up froa the Northern Zone
and from the. South also* . ^ _ _ _ ,,.^
Most of the Couiicil members will be there, so ±f -fchere is anything you
xrould like'to'discuss'wi.-fch then it w.ll bo a good'opportunity. Don't, forge-fc to
le-fc Ted Cruise VK7EJ have yo-ar suggestions for this year's event,
COUNCIL I'lEEIING. . __ , . _. . ,. „ . „ ., -..
Tho^^t Council Meeting W.U. be hGld in the Club Room on iONDAY
Sep-tember at 1930' hoiu-s, .
ceipts are on hand for s 839 VK7ZAL. 8^0 p*J. (^s.s*. 8^l,M^BolGh'. ?42
^F. H. Young, '846 SoF. Cleland. 851 P. J. Eduards. 852 E. A. Groenhalf. _858_M<^Koglin»
860'^S«%Le^T6;7"S.Zco^perT 874'VK7AB,"'21, VK7ZAY. 25 VK7£D. 29 VK7ZA.V.
3rV K7BP.~32"VK7GV. 10 V:<7BX. i3 VK7ZW. U VKj^BE.
JAMBOREE OF TIIE AIR.
-You-are remfnded that •fcM. s wi.il -fcake pl<ace on Oc-fcober 19-bh and 20th« More
'stations vri-Uing to take part are noeded. Gon-bact Ted Beard VK7EB if you can help,
COUNCIL MEETING NOTES.
A-b the last tomcil Meeting .held on August 19-th appUcations for fuU
meabership were spprovsd from VK7ZJG. W7MD. VK7SK, TC7ZEG. ^and f^or associates
Messrs. P, Hildyard, G. K. Rieger (ex DJ5LZ). ML-nutesof the last Federal
have been rsceived and w.U be fuUy considored at a later meeting.
^Terry Connor VK7GT agreed -to wri'fce the not. es for "MateT.ir Radio1 1 tlu. s month.
I-b TOS decided to have the Ins-fci-bu-fce' s duplicator thoroughly overhauled so that. it
Mill be ready to be used if required.
v._ ik F. NOTES,
Theso~vill be found -bin.s raon-bh in -fche fom of a supplemen-fc, the stencil
I have been cut and the notes wi-bten ty 1'H.ko Jenner W7ZAV»
The Monthly Bulletin of the Wireleys Instit.ufce of Aus-traliao
September 1963 Tasmarsisii Tji"i±sion Page 3
TECH TCOAL by- %7ZAI
A COMBINATION AUDIO AI^i^IHATIQNj^BCENlJ^T^^
^EI~ui^dT^lbed""i^~bl3si^rilly—a—№Vonieter, the output ciroiiii; be:?ng
arranged so -that the indicat.ing instnunent, a 0-1 DC nuj.liaiaae-ber reads either
the rectified carrier or rec'hified audio, Ths sudio signal is rectified }rf a
OA85 bridge for the inodulation porcen'fc measuT-eiaGn-bSa By means of a calibration
resistor "(25k pot, ), -bhe carrier and nodula-fcion vol-fcagQS can be ^propor-bioned^so
that the iiiillia'^me-bsr vill indioato percentage of noduiation, A phone jack is
includsd -bo make provision for audio monitoringo ¥i-bli the D. P^D. T, swL-bch^
conixected -to position No, 1 the devl. oe becone. s. Q sensit.ivo •wavcineter, Garrie:!:> sta. St
indicator, neutralizing device, and phone aonitor. With the szc.tch in the No, 2
posi-hion the ins-brcunerA raay be used as a inodaLa-tion percGnt indica-fcoro Oalibra-fcion
of tfie ins'fcnunen'b as a wavene-fcer nay 'bo easily dono ty following_any of^-bhe^me-bhods
descn-bed in the iiSGB or ARRL Handbooks, With -bhc switch in No ,, 2 position the ^
percent of modulation or hum can bs read. However, before tliis can be done, xt w'J.1
ho necessary to calibra-b® -the ins-fcrumen-b so that a carrier tone modulated 100^ 3s^
mroxMK^atat \d. ll be indica-bed by a full-scale deflection of the rae-ber. This may
be "accompli shed by the follow^ig ne-fchod ; With a tone modulated earner, indicated
at 100% by some accurat means such as a ORO, the uni-b vA-bh -che swi'tch a-b Poisi-bon
Noo 2 is brought within the field of the antenna or transmi-bter un-bil the note r
reads fuU scale or 1 ra»a. The 2%. pot,, is now set -to its maxLraura value to prevent
damage to the rne-be?? and the siii-fcch is throun to Poisition No<, 1< Ne:cb adjus-fc thG
2'5k-'poi3 until -bho meter again roads full scale. The position of the Gontrol Imob
should now be marked so that the po-fc may bo set at any time -to this_value for
meter calibration.. Now all -bhat is necessary t.o read per".cen-b raodulat. ion is -fco
set the pot to the rAarked value, place the BW.-bch in position No., I? ^une "fche 100
pf variaKL& -to and bring the
resonance -fc
va-^^ 'the RF. :fl eld, Yln'iJ i\'fche_m?I'er.
ui'u.
reads fal.1 scaled Wi'fch the svdtch thro'vjn to the No, 2 position the rae-fcer w.11 read
full scQle when the carrier is 100^ modula-fcod vath a sine wavo signQl, • On^spQceh
however, " an'aver£ige deflec-bion of 0, 7ma i,ri.U be suffxcien-b for a fuUy^modula-bed
carrier. Hum level can also be measured by noting tho raet. er reading, if any,, when
no sound is permi-b-bed to ac-fcua-fce the microphone, the gain control in the speech
amplified being ai. i-bs normal setting, A defleetion of 0. 05 na or less indicat es
a practically hum free carrier,
Ant,ennsi 4 x OA85
7
001^
OA85 . ^o! .5
.
s
--.. -&4~--T-f«y--r- s-
LI ^.
i" i loo
r^j
~[.I100 .0 ^.- 0"
25k? T 1 . ^":"1 2 0 - 1 I'-fa
c?^< •+/0\-
v.... y. I
<3- Jl
—<».' -V
2f5k v Q-...,
AA^A-^.
^.
-4
31 Closed circuit jack LI ( 3. 5 no. 35t. (21 qic 3 -b.
Sl DPDT Toggle ' ( 7 nc No., 26^ (28 me No. 18
( U nc li-" dia, (50 nc li" dia.
Sl, PoSol, Audio Mon* U4 "Co' 1 to No. 16, i-'' dia
Pos»2, I>fodt, Porcent»
73
Chase Harrisson^ YK7GH
for Bulletin GommititGea
The Wireless Institute of Australia, T&smanlan Div.
September 1963. VoH. E'. SUPPLE1№KT. By the"Voice"
Firstly I would, like to welcome readers to our new place in the
Bulletin. The reason for having a seperate page is tha-t up till now it
has been difficult to get our notes in on time, so we are now out-bing
our own stencil. News for this page will be welcomed from one and all,
particularly from -the north. The address is .. <. M. L. Jenner, P. O. BOX 14,
New Norfolk. Any news. received will also be passed on for inclusion in AE.
BAND ACTIVITY.
50 mcs. No DX has been heard or worked during -the last month in the
south of -the state. However, -fche usual gang is still ao-biv® on.. -fcliis
band around 1800 each evening.
144 mcs, Sunday night has proved very popular during the last few months
on 2 around 2000 hourso I-t is pleasing -to find quite a few of the par-
•fcicipan-ts using 144. 1. This makes opera-ting so much easier when a lot
of stations are. taking part. One csn go on with odd jobs around the'
shaok and what have you, "without having to re-fcune -the receiver.
Those usualy taking p&rt in the ragohew on Sundays are... VKT's, ZAQ,,
ZAO, ZAI,. ZAP mobile or fixed, ZJG, 2AK and ZAV mo'bile wi-fch ZAX and a
few others joining in on occesions. ZAV now has a $22 operating but Yifilf
ZAQ,, complains 'bit-fcerly about the frequency r&nge of the audio, BO I
guess 'some more -tinkering will have to be done.
NEWS IN BEIEFo
Phill, ZAX,-'hs,s recently invested, in a new car but hss decide d not
to instal mobile equipraen-fc. I -think this is so -fcha-fc he Gsn sneak off -bo
the Drive In v/ithout anyone knowing,
The recently Knnounced engagement of Winston, ZAP, doos not appear
to have interfered with his hob'by as he w&s put mo'bilo a couple, of.
nights later, Congr&'fculE. -bions from all of us Wins-fcon,
The l&s-b AOCP class has at last received, worci. from those who know,
There wont be as msny new calls around as we had hope;d, but never mind,
better luck next time. Gongra'fculations -to those that did. pass, if any. ».
Saw one very tired looking- Group president on the Sunday morning of
the R, D. contest,, Looking forward "bo the Scout Jamborree Ted?
AUGUST MEETING.
9 members and U'o visitors attended the meeting this month, the
new corners being Ray Davis and Stevo Reason. Welcome "boys snd hope we
see much more of you.
The lecture for the evening w&s delivered, by Wilf, ZAQ, and was the
life s-bory of activities on 2 by the Emmott brothers. All enjoyed same.
At our next meeting there will be s, working bee -bo construct some
144 mcs. super regen. RX's for- the use of associs. -tes and o-thers at -the
forthcoming Ham Fest at Gsmbell Tqv.'n in KoveiE'ber. Wo would. extend a
welcome to all those interested in -this project. A last of parts required
will be announced on a broadoe.st betwecin now and "fchenii so keep your ears
cocked. Our worthy pre&idc-nt, Ted, liiB, is now in the; clear as far as
TVI is concerned, and wishes to thank all those v;ho helped, him in his
"fight -to freedom" as it wore. 73's Mike, ZAV.