SKM C450i24093016132
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. ;;'.-
T.HE W I RE^SS^MSIIIUIE
•OF /4:L/ST. eA.L. :/A
TASMANIAN DIVIS ON
BOX 851 J, : G.. P. O. , .. HOBART,
, ?TN-£ 1963 .
MONTHLY . BULLETIN PRICE fid
. » .
PRESIDENT TREASURER ' SECRETARY
Mr. T. Alien Mr. C* Harrisson Mr. K. Spiegel
VK7AL VK7CH : . . ;^S7KS,:^
.
;. l'"
Registered'af G-. P. O., Hobaft, for •transnission by post as a periodical*
EDITORIAL, by VK7AL
'•'•• ••' 'j At the recent Federal Gonvent.lon-it •was decided' •bo •implement-plans for •the
nextr -I.-T. U. Gonf'erence, As you know-the late John Mcyle was our delegate a-fc the
•"". las'b'I. 'T. U» Conference in Geneva and the'raising of finance and -bhe bid.efa.ng • of
'.;- our'-del-egate VQS a -very 3'ushed affair. - This was nei-fcher fair •bo oiir delega'fcd-nbn
oAp cause, . • . ' :. "'. '. 1
To obviate this nish it •was uiianimously decided at the Gonven-bion.to •
•s c'otefflenee prepara-fcion of.. 'fcHe brief iiamediately and to_have raised by Eas-ber 1965^an
3;;'.;aftoufi-fc' of'^,'500, the money corLec-fced -bo be held Ty Federal Executive in•a special
-;-I.;'.''T.t. U. --Tlund,!'••":! . ;...—• !- , . ^ ^ .. :"":,. _. . . 1^.'^'.
-:-•!'': :• ' •'•-Bi?l':slbns ha^re been all<№Si'ed nanimum contribu-biohs'. as follows. : VK2 £1, 300«
VK3 -'£800, - VK4 £425. ' 'VK5 ^550. 'VK6 >£225. -. VK7 £2-00. . '• ' •; . ..
»-"-i • This:means'tyha-b if we are to hold our bands we^will hav® to ^-aise tKe
f-^quivaleh'fc of £1 per annum for each licensee for -bhe nexb -twb years to fil.1'our
minimum' con'fcribu.t. ion,
•We:'would welcome contritou-bions from all licensees and other manbers and
a.1eo non members, and yill be happiy to receive any amount in yearly ^ half yea rlfer,
"quarberly or even monthly instalmen-bs if you- wish, as long as we'get the finance
•to. lcompl&-beour obligatxon,
'•:.:•- -.. r.Fellow members, you are requested -bo give full support to -fchls matter, -bo be
wholeheartedly behind'your Federal Executive and help -to ful3y suscri.be our total
e&rly» . . 'Thanks, .in .QHbicipa'fcion, :
J!:"- •:. ••'•• !•: .•',•.•"-• •••
SUBSCRIPTIONS
• !'. • ?r - hfo'rfcunately a number- of members have still failed' to renew their
subscriptions', 'and as-a -final reminder -the amotuit owd. ng 'by you j-s sho'un •'below.
If not received by June 5th your name will- be removed from the "Amateur Eadio"
circulation list. . . . "••^- ;_
xx2cxxxx2QacsoaaoaoQocxx . ^
v, ',2C - . \ ^ /;• - '''• ""°' ;
"s ! • - -y •" ... -,,..
If no amount appears'you" are:'financial •to 28/2/64.
» • . ; •' . .
GENERAL .MEETING
. S - The next'mon-bhly meeting' of :-fche Division •will be held. iri'.;the^ Club Room,
14.7 Liverpool Steeet, Hobart, on-WEDNESDAY, 5-bh_June'1963 at 2000 hoi.u*S.;' '. ;^
r> . ^ Col. . G, 'J, Geard, Director of CivU Defence Ta'smarAa, has kui^
come-along and give us a talk on "Civil Def&hce Organi's:aUon". 'As •bha. sis an •'
oigafai's^iotl in~'^hich we. w-lt play an inporbant par'b, a'-good roll up-of members is
•eispee'b^., and of course we wi.Il be very pleased •bo"see a-tey •vlsi-fcors. •
:^;:
NORTH .'. WESTERN ZONE, \^^..., . :-:
The nesrt meeting va-U be hold on TUESDAY, 4th June, at Lakin's Hall, ;;
.
Ulverstone at 2000 hours
Page 1
^he UirQlea6-lBStl'fttrt/Q,. o.C Austi"alia» Tasmaoiau Di'vision,
Jiuae 1963 Monthly Bulletin. Page 2
NOCT_I^BH_'ZONE'»''•• •••"•••• •" - ••• —--
The nexfc meeting -will be held at 102 Charles Street, Launceston, on
FRIDAY 14th June-at 1945 hours./. • •;'
COUNCIL I^EETING.
The nexfc Council Meeting will be held in the Club Room on MONDAY, 17-fch.
June at 1930 hours. .. < ; ' ' ' ':
SILENT KEY.
We record yi-fch sorrow . the sudd'en'death on 9-bh'-I'Iay of Geoff Agchnan VK7GA.
Although Geoff had not beon on -bhe air nruch. of, late, he was previously -very gc-bive
mairil.y on 28 rac/s, and although unable^b-attend many meetings recently ^h^^
keen in-beres-fc in Institute affairs, He •was President of the "Division In 1957,
.
';;;;'il';. /?::^;:'To Mrs, Aschnan and her family'we:, extend our deepest sympa'fchy* . '•' ;;'!:'':'
¥.": "FNOTES ly VK7ZAV ^,. :
Well. readers, •this is. your new VHF. notes soribe* Firs'fc, of all-I. would .
like to. appeal to, all, VHE;-ent, hu, sia;s'bs:-;;forinforma. -fcion.. both for. 'thesa no-fces: and for
"Amateur Radio". The address for such information is nov M. L» Jenner. ••P. O«'Box-U«
New Norfolk. ' - .-
Band Activity, 50 mc/s. Stations active on this band in the So'ut.h-a^-'-bhe
moment are VI<7s1- , ZAX, 2AQ, :ZiAO and ZAV. Bri. an ZAZ Is hea.rd occasionaUy at week
:e"?s. ?he?;hom&?rGm Hu<311viue« BQyid, ^ZAI., is. on this band on: odd occasions,
;-usually to . supply or gain. informa-bion from'someone, I don't know what. tre-:wuld do
withou-b.,him.,.. ^ Allan».№». 'an^_Gwf€» ZAS,. .are active on-Sunday mornings >;. AiXan of
course, zath^the relay _of the VK7WI'news. ' The w-n-ber DX season is due."Qry-txme
now and should draw. a few more to^this hand, for a 'short period anyvay.
1^4mc/s<The story^is .a. lit-fcle. different- on thi;s band,, especially: in the North of
•^f-. ?lan5,*-' In^the sou^h.all'bhose men-bioned-for 50 mc/s and 9/few more are quite
active. The erbras include Barney, ZAK, and Wins-bon, ' ZAP, whom, I, 'belle.ve, -h^s"been
. -h^ard in Law^sion from fais'faome QTH in .Sandys Bay :. :by;Len'BQ. '0-t-hers^now'and~-bhen~
hsard are Neville, ZEE, John, ZpO, Danny,. ZDM, . and
Xck, ZAI.. 'David, "ZAI, is~ '
S^rfe^:l"^93rs e^saged in.^93{periinents:.-of some form or another, and finds 144 ideaj,
for •fchi. ^form-ofwrk. • . Pfaillip, ^U,. is-about to erec-b. a 50'foot mast'wi. th-Q. ^Q'
element Yagi on topand should put out a veiy nice signal ui.-bh liis 25~MQ^b^:~v
. ^st;,active s-bgtions in the 'Sou-bli are equi.pped for mobile, operation in some
form or: gno-fcbePi> perhaps .-fche mQst •cohsis-ten-fc of these being MUcp, ZAV, That i:s
y»!?J-lL. <?.an scrou?8e ^ PQWe:r. suPply*;' 'The last one he borrowed .. blew up a-fc: a veiy
^p^r^6^mom:^*/^Bef^the power supply blew up bowever,: it uas put to good
^e^?n ,^nday.. 2y^6?* ;'''Thi:s ya s. 'fche. occasion of an"expedL-fcion. to Mt, Wellington
.
; by the "Voice" to a-btempt; con-fcac-fc:, with'. .David and Ri.ck who were at the titoe7' -"""
!?!.t^on?d,-?n^?'lind,e:t's, IS?-and^..the dis'bance. being'approximately 208 miles7'Hefavy
c]-oud right throughout the pa4?h and rain at both ends did not" improve signals'but
reports of 5/7 were exchanged. . . '.:. ;T; ;..^
^ The^last meeting _of_ the .VHP. Section vs s held on.. the 15th May.'.''TIus~ms'the
aniiual. maeting ahd'-fche .follbuing '.were -elec-ted for the .coming'iyear V;:';' • -;:J""^;"'. :''"
!; . '. Presidefa-fc. : •• . "Mr. -E. -lBeai^:: .YR7EB "'•i!
Vice President №. B. Watson. VK7ZM. . . ; . ;::;-
Secretary. Mi. gg Anne Landers,
Broadcast Officer. .№«: E. Corly, ;. :'VK7ZAX
Assistant Broadcast Officer, №, D. Thorne 'VK7ZAI
Correspondent, -. '. Mr. M. Jenner. VK7ZAV.
Activities and Lecture Gommxt'-tiee,' Messrs,-D«McDonald VK7ZDM. W. Emmett
•.••1^^ VK7ZAQ. :/ . Mr. ' M. -'Jeimer-. VKPZAWi
Research Officer. Mr. G. D'Emden. VK7ZAV.
A parfcly^built 6 mx ciystal locked converter has been d^tg^ to,;. -fcb.e •.. ;'. '
i?clu?_?rB^:r'ne7!^?M:? a^d •t?li's ±s-;t6iftecomplQted. :.ly Reg.aM· li^,^^ and ZA.Q."
The conv^tfir^'-will .remain the property of -bhe ;VHF Qroup"ahd, in.-it^be.^'emb"to'~H*6Ft
Broadcas^Qf fleers, for the pu^se-of relaying ^he-VHF, Group notes ®
-'^'^^^s^_-Th, ere ^s m^c^ disGussioht- abo^'fc thj-s frequency and. the. 'foHoiri.ng
.•standards have been decided, on. .A totepgnce of 35 cycles :'per. megacycie.7gtvirig plus
.
or-. muxus 2*5-kc at 144«,1 is -bhe figure..'. amved at. We are'.not laying dowitte law"
bu-fc^if you^want_-bo be heard on this frequency this is the greatest deviation from
?.en?rT . 'fctla^.. 'wul giye a reasonable BFO note on mos-b of the conimunlcation ^stems
in u^6Jgt the moment, ., ; ' ; .. :;
The- y;Lrelj9SS. . XnetJL-fctfte of Aus^ra.Lia». Tasmauian Division,
June 1963 Ifonthly Bulle-bih.
V. H. F NOTES (Gon-binued)
, ;; Qsoar»: As mo. s*, of you probably already know -bhe Ws' are put-Eing "up another
'amatQur'-sa-fcaULi-be shortly. This wUl be capable of retransrai'fc-ting signals
received over a bandwidth of 50 kc centering pn 144»1« . The re-bransffli-btecl signals
;i411 appear over a bandvid-bh of e>0 kc. .cen-fcering. on 145»9» There wLll also be a
"beacon on 145*85».
,., COU GIL REPORT . by. VK7EB ,. ,. , . ', ,, ,•. .
The May. meeting of Council was. held pn Mbnday 20th May when all. members.
were present except VK7ZZ who was absen-b due .to a bad .attack of flu. Bu'siness
TO s quite exfcensive, and, briefly consigted of -fche following i-bemss
Applications for Membership* Inwards and Ou-fcward. s Gora?espondence. Account s ^-
Paging for Paymsn-fc, Subsidy •bo Zones, _Unfinanc-t. al MembBr s (Thoss concerned uill
......TeceiVQpersoiial notification in this Bulletin )• Youth Bedio Scheme - Progress
'.. RepoEb .by, VK7EB, Federal BusinetSS - Report on Federal Conventiojn and results of
i. vojsing: on agenda i"bems» , ^
The'financial status of the Norbhom and North Western Zones vas
.. dis.cussed and i-b. uas moved by X7GH that a subsidy of £5- 5s/« be paid -bo each
Zone. -'seconded ty VICTCT. . ^ In regards -bo the Convention report, ! suggest that
.
,, ;if:; there is aiy particular agendg,, it.em you are interested in, pl. ea.se le'byouy^,,
^. ".Federal Councillor know, and I'm . sure he wLll supply -bhe infoma. tton.^yosir.QqgLlre,
To .finalise,, further to my sugges-fcion re ."grovls" as men-fcioned 3.n..-. j^.?'b .
mon-bh's Biulle-bin, \J. £ •s[wi have one con-bact one, of your_ Councillora, tiy,, l,Qt-ber
or in'person. Go'uncilT^i elected by. you to act in yom' in-beres-b, Don. t.^ hgplile
from "the Stalls { Come up on the stagQ-and speak up. " if you have -the strengiA:
- ..pf. ypur con'vlctions. ;.;• .Strong irords I know, but who knovs, I may receive some
mil @pon< The address is 14^ Derwent Avenue, Liiidi.sfame,
CUIB BjOOM FUND . • . ",: ' _ . ^
: -Jack Ifi-Lne 'VK7AG has doiia-bed the followi.ng:gear •bo be dispoaed of ta;;8ld
of the Club Room funds and it will go to the highest bidders. Offers -bo_rea h
the Secretary , W June 17th« Remeinber gFL proceeds go to the Club Room Fupd so
make a reasonable offer if ycu are .in-berested. :_;^,. .. ,,^ .
... Item • Vibrg-fcor power supply in case. 6y inpu.t., 228v, ou-fcput -bapped 150v,
-: and ^5v»,-. \ Bias l8v ,awi 6v, a'bout 100 ma. Spare vibrator, _ ,_ _ ,, ^ '
"Item 2 ' Genemo-fcor^, 12v. input ^70v ou-fcput 90 ma,. includes 3 volta. ge re •bqps
r-', and met. er· ;. '. . ^ . . '. ".. . .. ' •'•
* ' ' :; The@e can .be inspec'bed at "bhe next mee'fcing.
•. NEW. ME№ERS; :,.. ... .
-'. ' ,,-Lwe .welcome back into; the ranks -bw old -bimers in. GTOsby Walch'VIS7QWand^',
,
'
Roy Drake, who were both active iii_Ins-bitute^affairs some 30years ago^ w9. a:lLSQ
i,. *vdLcoffle new AssQGiate Members lan FUby, F. .Richeljae, I. L. Eadie and I»M, Qamp
^
STBAIS. • -: . ;. ' .. :..'
'""T'VEZQL reports in -fche N, S •WJiivlsiongl Bulletin that, if you mr^edJJPlRIL
.,,,... '/6r CLO:WN~(8mong^ others) on April 1st. i-t's not much good looking for a._Q@Ii:hi, Ii
r"'"""'" """Hear that Ted Byme 'VK7ZBB ha s. been successful in get. -fcing hia AOGP,
Aons Ted and hope to hear you"on before long,
"Our "thanks-to Keith Johnstbn-'VK7BX for his assistance-in bringj^ig baek
more disposals gear from Sydney.
li'P.Ti'.TPTff - '
£c-eiu-bs are on hand for : 780. VK7RT. 782 W7CL. 781_VK7JO. 783/4 Miss
A. LQnder^.~^77970.G.Winter; 788 G. :J. Howard, 789 L. C. Morrell. 790 A, I,Bede^pb
791-H^J. Hiscutt. . *
THIS MONTH'S REMINDERS.
TUESDAY, 4-th. Jiuie. North Western Zone Mee-fcxng,Lakin's Hal.1^
IffiDNESDAY, 5th. June General Meeting, Club Room,
FRIDAY. U-bh. June Northern Zone Meeting, 102 Charles St,
MDNDAX, 17th. June Council Meeting.' Glub Room,
Applications for Disposals "to be in,,
WEDNESDAY, 19-bh. June V. H. F* Group Meeting.. Club Boom,
The Wiyreless. '.-Iiis-y^ufce, 6'f Au^i>Q.}^».^saam^n Elx'vision,
June 1<?63 MarrbhLy Bul3. etin, • .. ',;. ;:. : • ;e 4
-"TECICCCAL" "by •D; Thome 'UK7ZAI
What is a Hi h Gain Receiver?
•. '. ;i^ .. ' • •Ne:inight/-bhinlc 'at. : first -fchat -bhe. more gain-•fc he better, but it is interesting
tono'bs_thati'fc. is. !possib3. -&;tohave too much gain in a receiver. The question
,.:natiiz*allu arises as •fco'how-Auch gain is actually needed,
We nuLgh-b decide tlia»t we muld like -bo be. able :to hear a 1 laicrovolt signal
ss the weakest signal that need be heard, iyiost sGcond de-bectons/o.psrate best when
•fche signal level a-b the detector is in the ot'der of 1 to 10 volts, 'This means the
gain must be sufficient to raise -the 1 microvolti signal to roughly -buo:: volts vhioh
is..'t2'6 db« We migh-b then decide we irould like -bo be able to listen'-fco some of -that
DX. -fcha-b. is putting iH'-oliLy 0. 1 iiiicrovolt signal, I-b would seem logical that all
that is neces^axy'is. to increase the gain -ben •times (2Qdb) -bo do this. -However,
there is one factor -bha-b inust be Qonsidered in such a calculation. The. .first tuned
'.Lcireui-b in a receiver has in i-fe a . cer-tgin. level of -bhermal noise and this noise
level de'fcermines the lowest signetl level tha-b can be heard. Or, saying it the other
•way round, we do', not need any more gain in a receiver than that necessa.yy •fco hear
the
fi rst tuned circuit noise and actually we will use less than this gain most"of
the time, ,•
A. means whicli will. give an idea of -bhe magnitude of. the -fchenaal noise 3, 3 to
compute:, ,-b-he -fcherraal noise baaed- on the receiver'input i;esi.stano. e .. and the IF band-
mdth. Typical receivers having a 300 ohm input and a 2 KG bandwidth give a figure
. of 0. 1 microvol-fcs. Ihj. a meaps -fchat the maximum •g£iin we irould need between antenna
qnd second detector in •b£iis. ;case is ab&u-fc 146 db, and then the noise would be at a
2 Yol-fc. level at the secon&^detector. It also means -bha-fc a 0.1 microvol'fc signal:
covl<i give only a relati:-\SSy poor signal -bo noise ratio, because signal .voltage and
noise voltage would be equals ;
^Ac-ttually,, sxnce t^ie first BF. tube, will also contribute some noise, the chanoes
of a 0,1 microvol-fc sigrial producing, a usegl^e signal to noise are doubtful, Uhen
the antenna is connected to the receiver, we find -that on many of the ama'beur bands
the noises picked up are often of a much different character than the tube and
tlitermaX noise, licked up noise. has often higher peaks such as static, ignition
nol»Q, c power author^-fcy hash etc., v±th -bhe result -bha-b a useable signal must be
oonsidei-gbjy grea-'ter than the receiver noise level and the gain required j.s. •
corresponding^ less than the calcula'fced value,
.
YL. If you:-build; more. gain Ahan necessary into . a: receiver, vihen the A&G is' turned
on
the^receiver gain is reduced ty the AGO'to receiver'noJLse~is
the point where the
"^t??^^?d:??1^1^ 'b^e"d?"be?^o:r OPera'b:i-ng level, When 9.' signal is tuned in, the gato
au-fcoma-fcicaUy adjusts itself to bring the signal up to -the detector ope^ting level.
There is^perhaps a little different point of"view than -bha-b most often"uaed"?n"
considering the Au-boma-fcic Gain Control, or AVG as it is often called.
In considering the weakest signal we can hear, wo now realise that this is a
fun?i?n. '?if,_?ig^!al. "bo noiseratio lAen the gain. is adequa'fce. The tuned circ'i^-fc noise
is unayoiiiable . (u&Less you lower the tempera-fcure of -fche circuit to absoiutQ
•uhcre^he thermal noise is no longer produced) so the wsy VQ can imp-bove the signal
to^noise^ratio is to make -fche -tube noise a smaller propor-bion of the total receiver
noise. In prac-bice the law of diminishing returns applies here. . .
. . L.L,.:'-J. eo.. answer the original, iytestion, a true J-iigh. gain receiver: is one wiu.ch "Ha s
&ht)'o^hj gain so' that we can hear the noise appearing a-fc the grid of -bhe fxrs'fc R$ltube
, :A .General Ptir ose Harmonic Generator,,
1 pf. Jl fs" In'terpolation osc. irip-u-fc if required,
Output -OA95
(" :.. 56Q. ^,,,
}l00;;pf ^ I ^
T ' T~ ' . ^ • _'. '.-
105-v. Reg,-
J
T
±:' 6. 3v.
470 pf
o Standby x
Continued next, page,
The Wireless Institute of Australi-a. Tasmanian Division,
June 1963 Monthly Bulletin
DISPOSALS.
"The folloid.ng gear is still available -bo financial mera'bers on the usual
conditions, Applica'bions on the attached form to ether •with remittance to the
Disposals Gommi-fctee 'fcy June 17-bh.
I-bem No.. Descri Uon. Price
B3 Set of microphone, driver and modulation transformers, 122
•type. New, in sealed boxes •• ••.••.. Set ^5s/-
Or separately
B31 ZAA0616. 1'fi.crophone -bransformei- ..•..••»•• 5s/-
v B32 ZAA0615. Driver transformer ....... *,. 7s/6d
B33 ZAA0617. Modula-fcion -fcransfomer .. *,••.... £1
01 EPO coil, 455 kc/s for 122, New., ........ 3s/-
02 Kit consi-bing of : 12/24 volt heavy duty 100 ua-b-b -vibrator
transformer 90-177, mul-fci-tap secondazy (about 200-400 v) vri.th
"C" Core? Tw hea^y duty 12 volt 9 pin 100 wbt ^mchronous
vibrators (one for a spare) and socket; and one 100 ma filter
choke. (The vibrators alone cost £8 each new). BRAND NEW. • • £2-5s/-
G3 770170 Vibrator transformer 6/12 volt. "G" core (believed
suitable for transistor power supply windings)• Secondaiy
multi tapped abou-b 200-.400V, Similar -bo 90-177 but lighter duty
Brand new • ,
04 V5211 6v. synchronous vibrators* New, boxed • • • • • , 6s/-
05 2N301 Power transistors. Used but all have been tested CK, Two for £L
We also have the followLng available, but as there are only one of most
items we offer them -bo the highest bidders. Offers to Disposals Oommit'fcee ty
June 17-bh. but do not send cash - you will be advised if you are the successful.
tenderer.
06 One only 522 Se-b plus 28 v. power supply, microphone and ciys'fcal.
Modified U4 mc/So
07 One only "Harbros" (70 me or something) mobile transceiver and power
i^ply. (Could probably be modified for 52 mc/s)
08 One only miknown make, Looks l&ke the receilver section of VHF mobile
rig. No valves. Power supply (tramy, metal rectifier but no vibrator)
Includes several minature ceramic valve sockets, ceramic disc condensers,
and other parts.
C9 Four only Genemo-bors, 12 v, input, 250 v. DC output, 65 ma» plus 6 volt
at 3 amps,
All above items can be ibepec-fced a-fc the next meeting,
DISPOSALS
To W, I. A» Disposals Gommi-b-bee, 6/63
Box 851 J. G* P. O.
Hobart.
Items a lied for Quantity Price
Cheque/M. O. /P. N. /Gash for £_____ enclosed. Plus postage if applicable,
I -wish to make offers for the follomng :
Item No. Price offered
I certify that "these items are for ray owi use and not for re-sale,
Address __________ Name
SUBSCRIPTIONS
To the Secretary,
Box 851J, Q»P.O Ho barb
I enclose chec[ue/M. O. /P. N. /Cash for £______ being my subscription for -the
year to 28/2/64"
Address _„. _________ Name
;:!;. ,:•'••'. '..•
The Wireless, JnstitubG of Australia, Tasmani^n Division,;
June 1963.. "•''•-'-••"'''••'•ItentU^'Qx^^ .. -..•. ... ':•. :. -,.. 1)3^5
-TEGHNIGftL. -" •-"-•• ••--•- - •• •• •••
A General Pur ose Harmonic Generator (Continued)
The vacuum tube ciystal oscillator and diode harmonic generator is extremely
useful in spo^ing^the,;e%ct Imc ^Qtson\ai^y:re e-fcc^ The harmonics
of the 1 me ciystal are strong enough''-£6'use iip to'''7:2^ mc/s, '\Aien -bho •imi'b's ou'bput
lead is plugged in:fca:tho,. antenna ^co-ax. fitting on rec.eivQrs near this frequency,
The dual triads type of ciys-fcalosoillato'r' uses crystal seriQS resonance'and
asorxes^aiCiabiecapaci-boK.
f.br beating this psci.llator wi. th WWV.
zero The frequency
stability rs usually, rauch.better ui-fch a Series resonant arrangeraen. rfc, using, single;,
•tube oscillators. ^ The. 2^-'Milliheniy'. HFG used as a,. rosonan'fc -ciycuiti at i. mc,, niay. :;. ;,
need tunis removed if.'.ithe uni'fc does no'b oscillate, :: ; '
If ary spot frequency is required in between -the 1 mcs spots, an, audio .
osciUator (20 eps - 100 kcs)/, or a signal generator (usually 100 kcs - 1000 kcs)
may be injected into -the in-fcoi^ola'bion input, and. so'-the unit used-as a frequency
meter or signal generator in the bands from 1000 kcs to 725 mcs,
The accuracy of'Ahe measurcmen-fcs , •will depend, on .the a'Qcuracy .of the- 1000 kc
crystal and the calibration accuracy of the audio or signal generator used."
ANTENNA MASTS F.1 .TINGS > ETC. • - . . . ' .. '. ". • •:„. : ....... ' •.. .. :.,
We have made arrangements with a weU known local dis'fcri.butor for the supply
of antenna masts and assembly kits at a s.pecial rate to JE'inan.Ciial members. :of Ahe';~ '
Division,,, A-y. .orders to the Disposals Gommi-fc-fcee toge-bher"~wi:fc'h' a reinit-Eance, "" ~':—~
Deliyery'is'free in'-fche Hetropoli'fcan area and to the Hp'bart Bailway Station,, but.
coun-fciy members will have -bo pay freight or grralige f,c(; lcblXeG-fc, ' ' ^.; •-i:'-i:;:
Jtems available are ;
TeI6mast, ;;'20»,JE3. . 30<'::£4-12/-. . 40» "£6-6-Sd, i501;':f £8-1Q/-
Ri.i^Kin^• •*^s:; comp'rl'sing turnbi^ckles, thiEiT:^is, /brasslin^Glaiq5@an^^
:::;:"'"2Qi*/ £2-;6- 5d. ;:;;30« £3- 7- 9d. '^'^0' £4-0- 4d. T ' 50' ~'£5^.D^'3^r .
Mffs&s. ' ''Ib'i 'x:^';' ias/3d.. 12' x 3^-" £1" 4- 3d. . i5r'x 1^' £1- 6- 6d1:i ';^iv'
Slfiidries s te.1^ rape'^hirabl;es7d. Anchor pla-fces ls/6d»'' Tiirnbuck^o's-^sAb^, "':i''
Gi^'rings 1^[~/ls^5S. ^l^ ls/9d. Brass line clacips ls/3d. Fpot"inourits lls/Sd*"-
Giy^Lre 600'".^2-t6-'^d.; , '/•':';' ' . : ~ '-"~" : • •:- '"'''' "' 'T
SCATTER . '.'
.
by VK7EB
''•"Plea sed' to • see ' 'Geoff D' Emdeh ba cl; iri 'good he'al-bh a ga in.. The V. H. F, gang
suspect' Geoff is going 't{o:"rip'up the "unmQnii&nables" and use the metal stays for
a multi-elem^nt Yagi ofi U. H. F. Excuse the p'lui - but, "What is the •frorfb' to' bgols--. .
ratio Geoff? " I'm referring to R. F. of cours&J " ' •' •• • . .. '.• :. ;',,••, ;.
Lon Jensen's son, who is imder'fcaku-ig an engineering cadetship at the Hydi
i s;'asking'aifewardquestionsj '•It seems he :ha s'doubts re the -fcQXt' hsoks clain^ag
Edison as i'he discoverer of '•the "Elec'tric light". ''Apparen-Uy. hs read •fche. p.a-bTa :•''
of -the dim dark ages in the Bulletin recently. - "• ' : :•• i- ' ' • ".
Saw the aliaost . completed product of a S.«, S. B». exciter the other day - 3^. mcs
U»S, B» - L, S*B» arid' G. y. Lbdked good - should :tie good, and no-fc so cdstly ei-bheFi
Vtore abw^'it I^w»' ';''':i ' •'' ~ ^.•.•.•••^ ...,.,. .... .. , -;';. ---^;
I believe TH! has a YL control booth •operator. ' GouLd be the first time a'
XL has undertaken such a position in VK7« Perhaps you could let me know Anne^
DISPOSALS- . -... '^'J •/....... .. .. -..,.
Members purchasing disposals through the Division are reminded that it is
sold to them on the express condition that it is for their ovn. uso and not for
resale or is not being purcha sedi on behalf of a non-mffla^er. r'Any;, breach'of' this. vrLLl
au-fcomatically vipe the offender off our customer listj
You are also reminded that articles are sold as received and may have
hidden faults. Th<y are sold subject to these conditions and caimbt' la-ber be
exchanged,
WNTEE -':' ;' - !:1<--" . ;:-.^•'•.•... * . ":1^ . '-1".. '. _ ^ ^. :; ••:'. '; :• , i. :?];- ^'':';;.^'':
'Sc^ap lead, '''coppery ;cGpp€r:^vri;r^'br£iss,- zlhc ofr;aliffiu,m;um, 'All'il3heaQ''ca;n::be
sold quite profi-babl^• fof-fche" Club'Room-Fund,' If you'have raiiichon hand'dorita^tft Ted
Cruise VK7EJ and he va.il arrange to have it picked up. Otherwise leave it at •the
Club Room,
WAOTED 7G--SJS' ••:- *-•
A BG453 190 ;- 550' -kc Command receiver. Contact Phil Gorty VK7ZAX at
44 Congress St., South Ho barb. Phone 21953.
LIBRARC
Our thanks "to Associate Member R. K, Jaeger for his donation of books for
the library,
Th^s Wireless lus-fci-but-e o^ ^..Australia* T&siaam-an Divisiofa.
Ame 1§63_ -Monthly Bulletin. Pa-ge 6
••-. BEPQRT- OP E^iDEaAL GbNVENTION I]ELD AT SYDNEY - TEB. ,1963
BY S. J. ' CBUISE VI:T. ;1J FEDERAL COUNG-ILLQR :; .
•If. ; • ••
The'Federal Convention bf 1963 was or-g which in it's preparati.onal
stages looked;as though it would not Ie held due to lack of agenda i-fcems.;
bTi[t~'when^i:fc op&n6'd there were some thirty agenda itema plus about five or six
general business items, making for ciuite a busy session in which scaiae very
iiapor-fcatit decisions were Blade.
. Our own items, of which there were two, were well received.
»•
;.;, Item 5, 5 dealing with pulse modes was carried unaniaously.
Item 5. 7 dealing with the addition of H. C. V/. to our item of last
year 5 Y/. 1:.H, for LAOCP holders) was also carrie'ii utt&hlmOusly.
General Business -Item 2 . !
*. '^e ?Sked tuat a copy of Federal Policy Book be provided to all
CotCEicil'l'Ora - carried; unanijaously.
Items of great iiaportance t'o the. Aiaateur Service'and the Yfl^-inducted
one that. lai.d down a format for the eventual formation of a Federal Conpany; which
I an ^.quz^e^ure will ineet. with the approval of a 11'members Because it retains the
9i-^isiona]t~ set-up as we know it now, and at the sacae time gives F. E. the neo6ssa. ry
authority to. approach and wprk with or against tha "powers that be" oft our behalf:,.
anothef* Item laid do\mth^ policy and financial arirangeiaents necesaary to send our
delegate to the next I. T. U, Convention. This included the necessity of raising
about £3, 500 by Easter 1965.' Tasmania's contribution to this amount is £200.'.'
tsany other sulbljeB-fcs ranging from Gontests and rules to ttie use of JEtTI?
fr OKI the* c'onferrtiig Honorary Life lienbership, to the authorisation for F. E. t. o buy
a n^w''fcypew!riter, were discussed and finalised, ending iip with the decision to have
the Coavention next year at Adelaid,e»
* . ., In cottclusion I TOuld like to place on re'cord ny apprecia-fcion of the
hospifaiity of the N. S. V/, Division, and my corigratula-bions to a good Convention
well organised.
If any member would like to discuss any iten of'Federal "business
at*ariy tine, please feel disposed to do so - by phone, letter or over a beer..
Spaic*, but not all subjects op the air,
, 73...D,. E!.....VS7BJ,
N, B. jWe did buy the typewriter for F. E,
Thanks "bo the help of several members we have been able to turn out a; ,••„,. ',/
bigger, and, I hope,a better Biilletin this month. Ted Cruise even had the" s-bencil
cut for. his Convention: report above,.. : I don't'expect, tto-b, . but If. you write ;'fc.j?e,
articles or .contributions I'm only •too pleased to-•do the rest* ': :G;''. '
73 . ., ,,,,.
Gha s, Ha rrjjysroK. " VKTCH'
'for • Bulletin .. Gommi'b'fcee •• •