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THE:. WIRELESS:. J.NSTj.. TUTE
O. E AUSlRALiA '
TA 3 MANIA N DIVISION
. 30.{ S 51 J. G. P. O HOEABT.
November 1 62 Price 6d
MONTHLY BULLETIN
SBESIDEICT
. TRE.ZSURER SEGRETARX-
.
Mr»,T. Alien 'VT7AL №. . G.. Harrisson. VK7CH Mr. K. MilUn'VKTKfi.
CrENER&L. MEE3PING
The next monthly general meeting of the Division •will bo held in the
Club -Room, 147 Liverpool S-b., Hobo r-b, on WEDME,3D^, 7-bh November, at 2000 horn's,
the lecturer for the evening being №» J. Browi YE73J and his subject " Cryst.al
Filters".
"••"!
HA M FE'S T
SATU.roAZ and SU№AY 24-bli and 25-fch. Novei-flber 1962
The organising corainit-fcee report !
On- -the- property of I-Ir, J. B. M-uirhead, 6 ailes froin
Ganpbell Tow. on the Ores ?y Eoad, right at the bridge over
the Macquarie Ri.ver» Proceeding from Campbell Towi the ga'fce
is about ten fee~b f rom-, ':the bridge on the left hand side of
j the road. • ,
Be in-it,' come along and meet the follcs from the other
Zones. Bring your SCL and the kids, and any visiting hans
from other Divisions- Re gis-bration of those at-fcending vill
begin at 1100 hours on Saturday 24-th. November, Bring along
yoxir iiiobile gear, -darection finding devices^ •uhe-'Gher on HE1
or VI-IF. Also bring along any gear you -wish to sell or s'wap*
j'lt is hoped to have some. disposals gear for "gale also, Th<5're
•will be a prize for -the mobile station making the greatest
mobile to -the Fes'fc, 'and niuaerous
j-nuEiber of conti ac-fcs'while
j other, ac-bivities at; the function,
I Anple wood is available, plenty of -water ifl -bhe -river,
!-fishing-for licensed, anglers, plen-by of "trees for hanging
an'fcennas, ample space for erecting tents either for eating or
for- sleeping. If s'-ou prefer acoonunodation, you can make your
.
o^-n arra-ngemen-fcs either ui-bh the hotel or notel in Oarapbell
Town at less than £2 per head for the night. There will •'
definitQly bo a barbecue on the Saturday night, make sure
you have the right food and u-bensils -bo make -fchis event a
great success. If you eanno.'fc be present throughout the
Hanfest, then cone for some of the time; whe-bhex- it be
Sa-fcurday or Sunday* We hope -bo see you there.. «.. »««. •VIC7ZZ
This is -bN Division's first big effort of -this type and we
confidently look forward- -bo having a good roll up of inembers.
fron all over the State. The site x.ras chosen as being one of
the most central •fco enable all members to a'btend.
NORIHEKN ZONE
The next meeting wiU. -be held on Fri.day^ 9th Novera'ber at 73 George Street,
Lgunceston,, at 2000 hours. There iri.ll be a lect-ure and demonstration on
"TV Test Equipmen-fc" ly Mr, Geoff Grompton.
NOKPR l'®STERIL.ZO_№
The next; mee'bing of this Zone uLll be on TUESDAY, 6th Ifo^rember at Larlcins
Hall, 'U]Lvers-fcone, a-b 2000 hours.
Page 1.
The Monthly Bulletin of the Wireless Ins-fcitu-fce of Australia.
November 1962 Tasmanian Diyision Page 2
COUNCIL I'lESTING.,
The date, MONDAY., 19th Noveraber. Tho placo, g-b the. residence of I'fr, Al^n
I'torriLsty VK7MZ at Sandford,
CLUB ROOM FUND
Cxal Evenin/, Gongra'bulations -bo the Fund Raising Goiainittee who have
han|ted in £11< 8- 8d profit froa the social, evening hold oh Sep-fcG nber 29-fch. This
is •an excollen-fc result as 'fche a-fctendance \. jas very poor. As is usual yith club.:
funotions of this nature the ^aae few stalyarts were -bhGre - without -fcheir
support the Glub Room Fund would indeed look sick. Of a nenbership of around 9p
^'fti'n a few nules of Hobart, only .9. Svll. licencees, 2 liniitod and 2 non members,
•wit^ a lady_guest each wore all tha-t bo-bher. ed to cone along, No associates VWFO
proaent, . and • only one represerffcative of -bhe younger nembers al'bhough x-b is these
lAio^Mll benefit'no st in -the fiituro fron the club roon. Surely there must be :
-SOEie^ac-fc:iv£1, y.. i;n'-wbJ;ch-'-fchoyare' willing -bo- partiGi.pa:t;Q''t6 holp'-bhe Ins-fcituie.
Let. '?he. conln:i-'b'be® have your ideas or suggestions. We are worid. ng uith avexy
vort,h wl-iile .ohjec-b in view and it is up •to every niember to do his bit,
yiS^LNWES ' . , ' " : • -• •
Tho Ja'uboree of the Mr went off ve'ry "well as far'as the tw netre link •
was concerned. One very good lesson was learned, however, that our tiine and
effort wuld have,been. bet-fcer spent on a field day or. a DX hunt, One of .the
number of^alternative nethods available of collecting -bhc infonna-bion fron the;-
H. F, statio-ns vjill have to be used "noxt" ye'a'r, ' . " •
The for-bhcoming, cp,nyent.3.on near Ganip.b.oll.. IoMn:.Tall . be. a. good .opporbuni-fcy
for. VHP exponeii-fcs to ge-b together -bo discuss -bechniques and some . laeinbers are
busy wrking on portable and mobile gear for the various ac.-ti'vl-bies which are
being planned 1jy Dave S.erry and Ted Crui.se* A really enjoyable .weekend is
assured, : ' . ' ' ^ ' " '' ' '
Sonio_new gegr is in -bhe process of. being fixed up. Reg,and Wilf w.ll
have a new 20 wkt 2 netre nobile comple-fced. lan 7ZZ's 2 inetre gear'is nearing
conpletion and Dave Berxy. 7ZAZ is puUing the finishing,touches "to-a 6 ae-bre"
convor-fcer and -fcransm-bter,. Other gear is "on the top. SQcr9'fc.. lis-fc'. •
The_noxt. VHF'.. ne:eting vri.ll be' held 'on Vedne.gday Novonb. er 21st and.. the
lecture ^n.11 be on VHF Direc-fcion. Finding Equipmen-b- ty' Bam@y. Watson VE7.ZAK,
VT7Vi
CLUB BOOM FUND, .... -. -.:.„;---------•-. ---..^
For Sale. In aid"of Club Roon Funds» №. R.\.. Rogers TC7ZAN has very
genorously^donated a Gorier coil -fcurre-fc type SR358 to be dispo.sed of in aid of
'the_fun(A* This turret, of'Goraannanufactiure^ is a beautiful piece, of gear for
aiyone wanting to build a general coverage ysceiver* 5 bands. : 500 -fco 1650 kcs.
1^62 to 5. 25s; 5. 15. to 8. 1,."7. 9 -fco 12.25?"l2 •fco'l9"and'18. 8~to'30''ac/s. "''''''' ^"'
? ?rl^quency is^° kc/s* TurrQ-b, variable condenser and dial drive, 3 I. F.
transformers and 5 oc-fcal sockets mounted on. chassis. Ins-fcraction book (in
Geman^). If you -are interested send an offer -bo the Secretary by Nov 1 th,
Dona-fcian. We aclmovledge -wi-fch .thanl<:s a dona-fcion from №, E^Niehols. VK7B^
Trananu. tter^ Hmi-fc, This exercise planned for Sunday Uth Novenber has
been cancellQd forLowi.ng the a'nnouj-icenont of the Universi-fcy Gxarnina-bion -bime
'fca'ble. Exaniiiations begin bn -the 12-fch, NoYenb(3r, and as a result, mary
prospective ^par-bicipan-bs have indica-bed tMat^they ^11 no-fc be •baking" pa rb in
-bhe. planned ;hun-b» ' "
. S. G. B. AM/iTEUR RADIO'IM1 D BOOK.
ProvLded sufficie.n-b orders can be obtained from: raeinbers, we; can •ob'fcain
a substantial reduction in price by ordsring. 'in quan-bi-by. ^ .So if you want a
copy sond your. naine_ ibo ether -wi-fch 35s/-. -bQ'.U-te Secr.Q'bary -November 1 th.
The'; cost to ^rou ^11 depend on. the nuniber of -copies ordered.... If. we c.an get,
50^your 35/- vill cover it, but in any case_it"should not exceed 40/-, "which
evea '^isn is'..a saving..of about l5s/- on local price. Gash-is neoe-ssary as
we have to pay when ordering.
_WLL THOSE TOO PUT THEIR K^'IES DOlW AT A RECENT I4EETING PLEASE LEI'
US EAW TE^CIR 35sA, QR, IIBCT WILL MS S OUT. . -'-—-. - — —-- -—"" —;..... . --
Tt is ^ikel^:y'ia"b this offer pan be repeated'due •fco:-bhe difficulty
ln_ge't'ting enou@b .'ra^Aers ,,a gain :to. qualify for the disfloim-fc, SO BEST-YOUGET
OME:NOW. ' - ' ' / ^- - . --^--. ^ —
Thi:s;. ls an .eXGfil3.,en-fc ,publication, on the lines of other well'. 'kn-ozm" '•:
5a?look,s? ^ in my"OPi^u-on is'-bhe best of then all. -Stiff•cover, '544~pages.
For further dope see page 1^. BAnia-beur Eadio" for July last,
Order fona on page 6,
The Monthly Bulle-bin of The Wireless Ins'bitute of Austi'alia
November 1962 T. asmanian Division Page 4
TEGHN1GAL.
•GHING QUARTZ CRZSTALS. Compiled from various sources by VK7GH
Etching, as applied to crystals, is a process whereby quartz is removed
froiq the. crystal by a chemical reaction 'between the quartz and a suitable
fluoride'etchant,' and'is noriaally accomplished by immersing the crys'bal in a
solu.tion of water and ammonium bifluoride for a controlled period of time. In.
•the early7'lt stages of the oscilla'bor vni-b . fabrication etching is used to reveal
the presence of •t'uinrahg" in slabs bars or rough-cut blanks. In. 'the final s'fcages
of fabrication etc'hing is employed to remove disoriented surface quartz and other
debris, "bo stabilise -bhe surfaces, to ininiinize ageing and -bo adjust the blanlc to
the.. desired frequency.
^r this method the frequency of most'crys'bals can be increased quite
easily and id.th far less work thah by grinding •them down, and it does not appeay
to affec-fc •bho as-fcivity of -fche crystal, A convenien-b way to prepare the solu.'bio?!
is •bo use a plastic cap found-on many bottles e-fcc, I4uc -fcwo capsful of the
ararapniura 'bifluo ride-and. five of •ua'fcer, bu'b as t. he acid so forms'd. is one of the'.
strongest -fchcre is, and \d. ll sven affec-t glass, it must be mixed in a. con-fcainer.
of p]Lai3'bic*1 This con'fcainor may be cemented to a .plas'bic saucer or similax* to
lessen therisk of lcno.cld. ng it over. S-bir -bhe mixture I'ri.th a plastic, rod until •
all the ammonium bifluoride oryst. als are dissolved. Glean the crystal wLth
car^sontetrachloride before commencing the e-fcching, The method used by VK7KA ip
to make-a little "bucket11 from a. plasti.c -fchimblo -with holes drilled in it- and a,
handle made of the plas'bic coveiing from a length of hook up id. re. The crys'bal
is placed in this bucket which is then suspended in the solution. To remove, for
a fEoquency check i-b is a simple matter -bo lif-b the bucke-b out of the solution,"
take the ciystal out •('n. t'h'a pair of 'bireezers and dry -wi-bh a tissue. Just dab. it>
dzy, do no-fc nib i-b i&'fch •the tissue as •this •will sometimes lower the crystal-a
few'cycles, bu-t i-fc does no-fc remain low.
The rate of erosion varies wi.th differen-fc ciystals and wi.ll decrease as,
the surface becomes smoo-fcher, so it is a case of tr^ each ons and find ou-b* Th®
ini-fcial ra"te would probably no-fc exceed 10 to 20 kc/s per hour, W^en a large
incriease in frequency is necessary it could be left -to soak overnight. The
crygtal•should be removed at intervals and -bhe frequency checked in a suitable
osc4.11ator)i but "bake particular care when negring the desired frequency.
ECTBE№ CARE SHOULD HI; TMM IN HAMDLING THIS VEBZ DANGEROUS SOLUTION,
AMD Vmm NO CIRCm'-ISTANGES SHOULD IT BE ALLOVJED TO COME IN CONTACT WITH THE SKIN.
If i-fc should VQQh it off inui-iediatGln.ri.-fch plenty of -water.. The\solution can be-
kept for future use, but rather -bhan have i-fc lying around the sha.ck and a potential
source of danger, discard it, ty pouring i-fc do-un . the drain, flushi.ng wi-fch plenty
of water. Wash ou-fc the container in running wa'ber, gnd nix a nei^r batch nesct time
you-wan-fc -bo use it. If you must keep i-fc, store ca'refully out of the •way, _
preferably close to -bh© floor so that if it should be spilled i-fc vion'-fc spill over
you,
Finally a hint -bo save you time when checking the frequency. Ifeke a
gadget j.ust big enough to -bske a FT243 holder out of a fairly s-fci-ff piece of
bras-s or aluminium (See Fig. ) Af'fcor reassembling -the holder, instead of was'fcing
time vL-bh the three sraall bolts that keep i-b -fcoge-fcher,. just slip it into this
gadget which will keep the whole 'lot in place. ; I'Jhen nearing -fche desirQd
frequency i'b would probably be -ui'sG _"fco do -bhe job properly and use the bolts,
Amrjoni-um bifluoride does not appear to be readily available from retail
sources her®, •bu'fc-. if enough inembers are interestod we •will obtain some for ;
dis^ribu'fcion. Iie-b the Secre-taiy know* I-fc is quite cheap and enough -fco do a'-^. .;-.
lo-b of ciys-bals. -will only sot you back few shillings. . :,
73
G. Harrisson •VK7GH
for Bulletin Goramittee
Registered at G»P. O. .. Hobart, for •bra. nsraissio'n. ly. '.post. as. a- periodical,
•f, '. ' i.
The Monthly Bulle-bin of The Wireless Institu-be of Australia,
November 1962 Tasiaanian Division
TRM)INQ_^OST
FOR SA'LE. • '
AR7 'Receiver •wi'bh coil boxes 'covering 160 m: -.. 30 mc/s» Needs a: li'b'fcle
lina.ng up 'but iii fairly 'good condition . ;»• , . ^30 or nearest
50' 'crank up. triangular s'b.eel tower, 'in 10t sections and fitted fo.r
rota-ting ma:st a-t •fcop, "100Q Ibs breaking strain vilia rope. ., £25 or near
Double stacked phased. array id.th Channel 2 reflectors • , • £L5
Gon-fcact №, D, Slowan "VICTI'IS. Glenbrook, . Sprey-fcon.
WMED • " .. --..
. Wan'bed to buy or swap 1 pair of low impedanGe headphones la.'bh cantFas
headband, Mr. P. Gorby VIS7ZAX 44 Gongress S-b.,. South Ho barb
FOR SALE
12 tube liara band receiver. Eddys'fcone dial B. P. O, Plug-in coils,
Ip good^condi-bion, Sparss .. £25. H. r. tabletop transmitter in steel case
G-eioso 6 band VFO, 3 meters,, 6L4$ final, all new parts, less, mod. tranriy., :.
mod, and final tubes and power, supply ,,.,£25» Brand new 6146 valve . » JE3»
Se'fc/of •bapered-galvanised iron full sized-. 20 ne-bre beam elements, I^ay be
inspected: at, TC7ZEE. QIH at Oatlands. Transpor-. 'arranged..., £10, Qiianti-ty of
3/16" dia. 72 ohm coex, cable. 2s/~ per yard. Se^ of ISv tubes for "Gommand"
rGc.eiver». . 25s/-, Mr, N. K. sher. VK7ZEE,. .3 Blackwod Ave., West Hbbarfc.
Phone 31037 or 20511 Ext»313*
ADVERT ISEI4EIWS 1^' BULLET.INo
'Mesibers are rGminded. -bhat there is a charge of 2s/- for each adverbisemen'b
- for sal. e, wen-bed, e-bca - inserted in •the Bidle-bin, This charge goes to the Qlub
Room Fund. If a sals results -fchero is coranq. ssion of 10^ with a maxim'um o.f. 10s/-»'
on each itemo but. in -bhis case we- have to x'e_y on -bhe seller of the arfcicle -bo '
send along the commission.
DIS OSA1S • • '
All members are probably aware that n:' disposals gear has bc-en available
in Tasraam. a for some years as it is. all sen-b to the Mainland for disposal*
However we have r.ow arranged vd. th the Vic-borian Division Disposals CoGTraittee to
share in'future purchases they make. The fi.-st list of gear supplied, by -fchem
is enclosed vji-fch -.his Biille'biny and i-fc is hcped -bhat. more "will be available
periodicallyi, fawvery. and-bhis. isinipor-ian-fc, it depends entire^--on. you as'
to^whe-fcher the schs^e can continue. Unless the demand warrants it, we will have i/»
nb. 'op-bion but -bo . scrap the whole tlung, . The Vic-fcorian boys have been good enough
to -fcake^ oysr the ey-.ra. work of sorting oyt -.he items we"want and then pack and. •;>''';:
despatch x-b, -and it s.lso means extra work frr the Disposals ConinuL-fc-fcee'meinbers here,
Prices are as arranged ui-fch the Vic-bcrian Division, which in most cases. are'
wel?. below what, you \, 9,uld have -fco pay elsemerEi. We have -bo pay freight, from
Melbourne^ so . occasionelly. we may have to if.arease prices a lit'lte on bulld. er
i"fcems<'. ' ' . •'. '.. . :• .
•We w.11 havp. -tio^ask coun-bry members --o pay postage. or freight or preferab^r
arrange to have i-b pi d;Q d.. up for you if yozi are not in Hobarb yourself, "It. ums
ordered Ty coun-biy aemtc-rs, from this raon-fch's liist could be -fca^en to Campbell Town
on-. Ndvember 24-bh, if №ey so desire, ,.,.. ;.
So nov you have the stoiy and remember unless you supp©rb us we'll be back
\ihere we wero - -with ncthingc IT'S UP TC YOU NOW. •.,•
J^iBOREE OF THE Alii,
!. Vfe wisli to thank -the follo'uinig statior.s for their help in tae Scou'fc JamboreB
of. the Ai:' held on 20th and 21s'fc October 1962, namely frora the Kcr-fch Western
Zones. VK7AI, VK7SF, ^7K7B'J; VK7IUI, VK7MX, F'-om .the Nor-bhem Zone;: %.7DK. and
VK7JF, .Trora.. the South; YK7CT, VK7FJ, VK7GV-, "7K7JB, VK7EJ, TC7EB, .VK7AL, •'VK7M.,
VI^'S, ^<.7JO, VK7ZZ, yK:7ZAO, V1C7.ZAQ, VICTZAI., ,, V£7ZEE, TO7ZAI, VK7ZiL. .,, I.t-. t-s.. 'qui.te ••
possible that some other s'b^t.ions may have pai'Ucipated, arid. i.f •bh°y.. '(iia, •fch'in -'• •
CUB thanks are extended to Tsyisi •fcoo.<, Special thenks arc due to Dav?.d 'VK7ZAI for
hai?ins so. dcvo-fcodly assisted a'fc VKT^'JI followi.ng upon •fcho issue of a spocial
provisional licence to opora'fco. on -fche high frcqucrLGy bands* Special xbanks aro
also .diroc-bcd -bo Nov X7ZEE for having controlled •fchr! 2 motro link ir the Sou-bh,
Y-our effort s, tri.il· bo used, Neville, and quickly. If any JamborcG sta-Aon has ^
no'fcyG-;; furnished a log of its activities, whether by way of -fchQ link. ^e-fcwrk,
or by -^ay of<-fche Post Office, vould you PLEASE forward'your log now. Tho'Scoirt
Hcadqilartcrs would like all logs ly tho first Monday in No-vorabor, Pl.oaso make
our rc-bi.rns comple-fco, . »,, *.,........ ••YK7ZZ.
The Monthly Bulletin of the Wireless Insti-bu-be of Australia
November 1962' ' 'Tasmanian Di-vision, Page 5
DISP SALS*
OISSTALS.
The fpllowLng additional frequencies are now available to financia?.
menders on -the tUidGrBtanding that -they are for their oitti use and not for resale^
Orders on -bhe a-fc-fcached fom., to ether vri.th remittance, -bo the Dispo.sals"
Gorami't'fcee by November 19th,,
I-fcera No, Descri -fcion Price
Al Ciystal.s in FT243 holders ............. . . Each 6s/-?.
3990 /+095 4165 WK>S^ 4215 4280 4.330 4340
4445 4635 4680 "^RX 4.930 5090 5135 5180
5385 5397. 5 5437. 5 5587. 5 J635 5645- 5660 5687.5
^. 5730 5740 ^d. ~59SO ^955 6^.5 6235
Frequencies imderlined are in short supply, in some cases only
one is available, so better give second preference. Plenty of
the others,
A2 Crys-tals in FT243 holders for mald. ng lattice filters e-bc. Tea.. on
any one of the following frequencies ••. «...., • 10-for £2.-10/-
^fft^ 3885 3990 4-1. 65 4215 4175 4330 4340 4445
4930 5135 5180 5385 5397. 5 5635 56^5 5660
/^r^~ 5687. 5 " ' " "''
<s~^^f _ '/-'7
A3 5 rac/s crystals in. FT243 halders suitable for 3 x-3 circiu. t for
52-54 Me band. These have been checked for acti-gl-by on -fchLrd
L.J— _'_ -_ "5852. 5(1)' 5907. 5(3) '5920(6)' 5950(3) '5955(7)'
g^.^? Nmiber available in bracke-fcs. Give second and third preference. "
r- A4 Four different frequencies in FT243 holders. Our choq-c 4 for £1 ^vl
The -Monthly BuTLe-fcili' of" The' Wireless Institute ifa.f Australia.•'•.
Noveraber'. 1962 Tasnanian DdLvision, '•• • '1; ; Page 6-
PIS PQSALS (Gon-fcimed)
B13 Pye co-ax. connoctor and Pye righ-b angle co-ax conneo-bor „••. . . . 2s/6d
"B14 "Mixed Bag1 1
contains 3 new wafer swi-bches (3 pmls 3 way 2 bank;
1'pole 2 way-2 banlc? 4- bank Kuscellaneous including .on.e cerarai.e,
long shaf-b); KF Choke and the following metal rec-fcifiers t
Two ZA^.599 half -wave ae-ber 10 mg, one ZAA598 full va. -ve laeter
5 ma (bridge), ZM0618 half wave'50 ma 4 v? and one which looks
like 16 y.. 50 pa. half -wave. ................ The lot 15sA
There are a few odd itens, not enough to advertise in Bulletin which
we id.ll auction at -bhe Hanfest.
The Secretary,
Wireless. Institute of Australia,'
Box:^5N- G. P. O. • - - . <
R. S. G. B. KfflDBOOK
Please reserve ne a coRy of the R. S. G. B. Ana-fceur Radio Handhsok.
Gheque/Gash/t'-I. O. /P. K. for £L-15s/~ is enclosed.
Address • ...,. . . . . . Naae ^ •
•"-IJj
^^ .^