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OP AUSTRALJA
TASMANIAN DIVISION
BOX 851J, &. P. O., HOBART
May 1964 MONTHLY BULLETIN PRICE 6d«
PRESIDENT TREASURER SECRETARY
Mr* To Alien Mr» J. Dore Mr. K. Spiegel
VT7AL VK7JD VK7KS
Regis-bered. at &. P. 0., Hob&r-b, for transmission Tsy pos-b as a periodical,
GENERAL IffiETING
The nox-t aon-bhly aoc-bing of the Division mil bo hold. in -tho Clu-b
Roon, 147 Liverpool Street, Eo-bort on Wedn&sda 6th. Ma 1 6/. . at 2000 hours,
The locturo will bo "Launoes-fcon Molbourno Micro Wavo R. T. Systom "o Your Loctursr
•this mon-th will 'bo John Hacey»
NORTHERN ZONE
The next noe-fcing will be held on Friday, 8th. ISay 1964 at 2000 hours,
at 02 Charles Steoot, Launoes-ton. I bolievo that -bho Lecture will consist of a
taped talk and slides -by Bryan Eyre, VK7ZBE». I can personally recommend, that the
slides coupled with Bryana conmonts will nako a very enjoyaMo evenings en-fcertaim&t.
IIORTH TOSTERIT ZONE
The usual raon-fchly ace-ting will Iso held in Lafcin's Hall,
Ulverstone, on Tuesday, 5^. May 1964. at 2000 Lours.
V. H. F. GROUP.
№e Annual aoe-fcing of the V. H. F. Group will ^e hold at the Club Rooas
147 Liverpool St. on Wednesday, 20th.. April at 2000 hours. Election of Officers
and. a general chin wag will ^ the agenda for the evening. Gone along or get du№ed
in for a job 1)1
COUNCIL №ETING
The usual Council meeting for May will ^e hold in -fcho Club Room
on Monday 18-th. May , at 1930 hours.
GOIIMENT ( 'by Horn. Ed'.)
I won-b apologise for this nonths BiUlo-fcin ~be±ng a lit-blo
undernotxrished - if you want a Ballotin really worth while, v/rite ne sone news
of Divisional interest and I will type it. Please tako note Zone Seoreta^ios i
My address is 148 Dorwont Av., Lindisfaz-ne. . J-so please let ne know by the third
Saturday of the non-bh. May I extend thank.. to VK7AL, VK7KA, VK7BJ, VK7ZZ, VK7ZAS
VK7ZA^ and the "Voice" VK7ZAV for -their assis-tance in the puUishing and
distriliution .
Tno Wireless Institu-to of Australia. Tasmanian Division
Mav 1964.•- . ., , Pago.
SUBSCRIPTIOITS .- ..
Subscriptions rooeivod since April Bulletin to 15. 4° 64"»
Acknowledgements and thanks -bo :the fo3,lov/i. ng'§ . VKTZAQ^ :VK7,IL-, VKTZJG^ . 'VK7ZOO§
VICTTT^ VK7RX5 VE7JD, VE7ZAT.§ VlC7EB:§",'YK7ZAI§' VKTED; VKTZAA^'.-VKTLE^ VK^IiK.?
VK?JB§ VKTZW^ VK7BI<§ T>?K7ZBR, VE7SP^ VK7BB» P, Duncan? j. M. Kerr? C. GoWaldon?
A»L. Beaumont^ J'oEoHum'blej.. R-. Strana^; M. . Hooper^ L. Jacobson§ B. P. Me Gafferty?
RpdoBalfour^ J. RoDarling^ H. PoSchulz^ SoG. Shor-fchouse.' '•
I can promise you ono thing chaps, and. that is I v/ont bother you 7/ith moans and
reminders aboat the non paying of Subs. in rioxt aoiiths Bulletin • Thosa who have
not paid t>y tho nezt General Mesting Td. il be •stru. ok off -fcho A. Ro distribution
list. vVe have publishGd r-eceipts for this aonth — unpaid aombers nGx-t monthIIII
Council Notes b, W7ZKS-
Elec-fcioh- of Offiocrs (5-bh. -fcG rm)' .
'
- -Prosid&nt T». :Allpn
Vice Presidonts - T. Connor; I. ITiohols.
Secretary - C. SpiQgel? I'Sin. SecrGtary -DoBerry (ex officio ).
Bulletin Editor -. E. Beard§ Technical Editor - G. D'Ei?. den.
Vacancy due to the re'signation of C. Haj?riss.on - T, Dare elected^
Treasurer - To Dore. Distribu-tion Coariittee - K. Hillon 5 J. Brown.
Minu.-fces of the last Council Meeting- read and oonfiracda
Business- Ra-fcification of -the anended Fccteral Constitu-fcion.
Application for membership - G. Power; B. Mc-Caffer-ty, passed, for subaission
to General Mce'ting.
№. yited to B -A 2AI^, 5BrI L, rVCR97 (with shield if posBible .. nd in the . listed
order of preference> A Power Transforaer 410 -. Q .-40). yolts @ 180 aA, (approx)
with 6, 3 V and 5 Volt tappings also alo H ® 180 mA. Please reply to 2. Ford
Ti-. nun. Rrlo Lindigfarneo Phono98406<,
A'thol_John3on licnorial Tro h
Congraiula-fcions are extondod -fco VK72AS? K. Honricks
in obtaining--bho highos-t ;sooro iu, tho abovG raentionod Contost.
Would anyone who anticipates visiting 9E3 with a vohiolo ploaso adviso the
disposals Coranit-teo - the roason., obvious*
73
Ted' Beard
" for Bull. etin Coaai-ttoo.
The Monthly Bulle-tin of -the Wireless Ins-bi-bute of Aus-bralia.
May 1964* Tasraonian Division.
TECHNICAL by Ken №eGldon.
A Sim Ie PoN. Po Transistor and Diode Tes-fcero
All parts for this instrument can be easily ob-fcained from the " Junk Box ",
The main use of this instrument is to raeasiire the leakage Curren-b and the
Gain of the Transistor,
There should te an apprecia'ble difference between leakage and Gain readings.
Leakage is measured in aicro Mps. For a good Transistor the leakage cu-rrent
should not exceed' an absolute maximum of 100 uA» the lower this reading
or current , the 'be'tter<>
Leakage Current v/ill be, or should be, negligable , and can possi'bly be
seen by operating the ON ~ OFF switch. Should "the leakage curren-t be
excessively high, transistor is faulty,
Gain is measured in milliamus x mul-t. factor : mul't* factor = Vo3ita e
Base Besis-tor
In the case of the circuit givon9 tho base resis-tor is 100k ohr.ls and the
voltage 3voltSt By applying -the given values, using the above formula we
get 33u.A; therofore -the multi fact, in this case is 33*
Thereforo; if 3"A is shovm on neter x mul-bi factor (33) = Gain
Gain = 33 x3 5 Transistor gain = 99«
The gain of a Transistor is measured while gain button is pressed*
Should the gain of a transistor be greatly down on -the quoted value in the
Data book, -the -transistor is to be suapeoted. But, tear in mind, -transistors of
identical typgs, may vary in charao-fceristics.
To test a Diode, connect Cathode "bo Collector terminal, and Annodo to
Emitter terminal and switch on. If Diode is OoK« oiu-rent. will flow9 and
with reverse conneotions curren-fc will not flow*
ITQTE^ To -best N. P. l'T. Transistors - Reverse 3 Volt tia-btery.
^> - ^ mA.
Gollec-bor^ 220 ohm +
Base
^—.
- ~s/v\
100k
^'\ l-^!
3V.
} Prsssi for Gain,
Eiait-ber Q Off - On Sw.
COMPONENTS :
3 Spring Terainals 5 100k ^ V. ^%', 220 oha -g-W 5^ , 0 "5 aA. rae-fcer^
SPST Switch^ Press Sv/i-bdi^ 3 Volt Ba-ttory Cyclo type).
The tireless Ins-fci-bute of Aus-br&lia, Tasm&nian Division. Monthly Bulle-fcin
^IF SUPPLEMENT May 1964 . By VK7ZAQ
The April V. H. F. Group meeting vras held'-on wed, t5'th with 19 members presen-fco
Br;%n, 7ZBE, ex VKOBE-who has ju&'fc r&turned .from A.nterc-bioa,. presen-fced a colour-slise
lecture on his adven-bures in -the deep Sou-fch. Those present enjoyed & very interest-
ing evening <, Bi"yan's lecture was recorded; -the •fcaps and aiidca will be circul&.-bed •bo
other Zones*
1964 Athol Johnson Meinorial Con-fceat;
This was won by .Kevin , 7Z.AK. Congratulations, Kevin; t-bvras good to see the
•trophy token ou-fc of 'the Sou-thern Zone''for -bhe first t;ime. This should give added
interest -bo fu-fcure Contes-ba,
Band Activity
52 MC/S
The" long aw&i-bed change from 50 •fco 52 MC/8 iiook pla'.ce on April ls'fc so far in
the South, Phil, 7ZAX in -the only one -to change ^o -fche new band. No doubt others
will follow when x'cals are reground e-bc..
O'therwise nothing •to repor-fc on .
144 MC/S
A new station on 2 mx in Hobar-b is Torn 7A.L, on 144, 7. l^elcome to 2 MX Tom.
Bryan.. 7Z.BE has . r.©o,:ppeared . on -the .band af-ter his return from VKO-land. Ae 1c ome back
Bryan. Ac-biTity in Ho'bar-b has dropped off a little of la-be, 'bu'fc is sUll at a^good
level. No DX has been heard . or worked from i;he ^ou-fch in the last month, I believe
Rick, 7ZAT has built a new fig, b'uf I have no de-bails.
'73~ -bill ne;;t rcon-bh , Wilf, yK7ZAQ. i
NORTH WEST ZOltS NOTES by the Voi.ce.
DurinK the E&s-fcer breal;, the 3 imc" band w^s opsn EQVsi-al 'bimes; Bob', 7ZAA, and P[ovin
77AH 'beiriK as-fcive, . Kevin, v'as .. lucky enough -bo v.-ork a VK5 as wall BS -the WSs during
this period'o The following Thurs. evaning VK5 sigs vrere heard- Ty/ Winston TyTickols
whoduly notified Bob e. nd myself« Wins ton we s copying VIS s at 5^-P by -bhis -fcime; and
at lasf-fchey became aydi13ls a'b -bhifl QTE, psa-kins -^•t: 'bes-b 5^-7. Bob vrorked 6 at;
ground 5/7-8, bu-^ -b:'y as I mic, h+; I could ns-b r& IE 3 any < !/ifra?d Irhe Voice ain't wot
he used '-to bs ; Ac a" result -bho nodulatlon on -:-nc- 522 ha'R bcsn improved by-the add-
•I-t i on of a 12A3'>;7 prsari;p.
The &3,'30Gia-fce mcAe-rs in -bhis a'"ea ars S7.'ct;JGing niadly for the AOCP exam coming
up shortly'c Kevin., 7ZAiI, jus-fc a^out has hie mobile fired on 2 HIS? and Bob 7ZAA is
deciding which box ou'b of his oollec-tior. -ho build his in,, so should have a mobile
signal from him shor-fcly s'. lsoo
During •the past •'/. r;skor EO, a couple of w&a1: sigs hav'3 been heard from -the Nor-bh
and the Eaa-b; bu-b in ho-Lh caBes no'c;h;;-r.g idontified,
N. W. Zone Gen. meo+;ir's;»
A-b -the Tai:F'i::?i'fcTEg~i't was lea ..'ned. tha-b Ea.sil, 7BL, is off to Canada later in
the yes. r, ar^ will be set;t;r., ng for good if he Ukes i^ -bhQre, Basil vn 11 be & loss
to •bhe Zons, bu-b a gp. in, to Canada. We wich ^ou all -bho 'aest; In your- ven-bure Basil.
Chsprlie, 7CH\vas a-c -fche . mee-fcing alsoj so -bhe:, Scuth'TC, ras we'. l rer-. -eesn-bed, wi'bh Reg,
7ZAO, and myself -fchers cs woll. '•- good •i;-'. ne was haci Tsy all..
As far as I knaw -fcha-'j ic all for -this non-L-h, chap", as I cc-iJd ,h:o1;. raise my spies
on 2 tonite,
73 till next mouth; M^.ke 7?AV-( The Voioe)
Northern Zone T'lo-fces, by Leigh Pret-by.
7iQ an 7R are now on 432 iff/S, i^'3' he've exchanged 5/9 reports 'both ways.
Although the geo.r is s'fcill mn the testing stage, the band sha'A-s promise for local
working.
144. MC/S ..
~A good opening occurred on Good'Friday •r. iigh'fc, •tlie follov^iag a-ba-fcions being s. oti.te:,.
7ZAA, 7ZAH, 7Z.EC, 73Q, 7DK, 7L2 and 7RL. Ths '-'?K5s were in till after midnig'ht, and no
signal reports were less than S6,
The y.YI rsbroadcas-ts and slciv TLorse, which have teinporarily ceased, due •to the
absence 7DK, will reRU'ae again shor-bly.