SKM C450i24093012171
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THE WiREL ^ S S JNS T' TULE
0;F AUST. RALIA .
MOI'TELY BITLLETIK. Tasmanian "Division. MAY 1961.
Box 851J,
... I^StSS.O.
HOBART.
Price 6d.
PRESID3I. '.rT» TREASURER. SECRETARY.
Mr. C. Harris s on. Mr. K. Millin.
Vs-. '- T. All&n,
VK7GH. VK7IO\.
VK'7AL.
Eegio'.ered atG. P. O^ IO ^B^ ^ ^r^n^ssiroj^£0^_al 1 £e£l£d^a-1^ -
G^K?A.L MEETING. , _^ _ . ^._^^..^^
The nfext General. Meeting of -the Tasmanian Division wi.
-i. >ld a-t th6 Glub"Ro6ms-"147 Liverpool St. on Wednesday, №y 3rd., at
';000 hrs
^-"— The Lecture this ..month will be given by Mr. Paul Edwar^',of^_.
"'. he Tasnanian University:"and"is entitled""The ^^"aluse,O^T^n:^rs'
^h^^Stors-making'/their appearan e in "ore. and, ulore. eciuiPment,these
^ys^'bhiswili be-a good opportunity;-to find ou-b, 3-. 1:)lt, more, conaernlnS,
•^se m^:berious'UtUe--bubes with some mir.es. com^g ouf ^f -the bot-bom ^or
•. he -iop^. :VISITORS_WILI BE WELCOME.
———---- r your Su scription ted not been reoeived by April 20th. the
. amoun". ' cvJing appeals below. ^
©, f^^@m^'^5^S^^^>&r?<^!&^
@ ©
© ©
@ :-©
.
';^Q.^S@t^^&^Q'ISS:::-}a^^SSlSS!&§.,
If no amount has been shown, your Sub has been received
THANK YOU.
3ub30^ip^ions fflBd . Donations ^^ived_fromj7/3/^l .^^O^^bl^
^^u^r^,
^Fj7m;"7JB, '7TE, -7CA, 7NC;'7SF, SE¥-^.. ^^S> %1
^ "^ ^ w' '^'^ f№: E:'7™i/"Lm^ffi:7S<^l7ui"
1^', 'T^', 7AF; 71^; 7RK; TOZ, 7PJ, 7ZRJ, 7ZAI,. 7^A, 7ZAK, 7^J,' 7ZBE,
.
7ZA-J, 7ZAV, 72AX, 7ZAG, 7ZAZ.
M^srs. 'H. A^TriKteb, J . K. Kerr, F. Pieniacki, G. CromFbon, R? Bradsmw^^
^slS^ht^1fSl^;TeS^so;rS^^Harper7^B^^^^^^
t^eS^,L6. St;^e?; S:^ong:'^J7D^e^~D.F. F°rd^ H. Chestern&n,
D. AP. len, G. R&nft, J. H. Schuringa, I.I. R Be-fchune
Il^_ll-^^- ^ ^^ ^,,^ ,, ,he Y.H. F. Group ^ill be held oa May;17th.
nGX" ^ stations on the V.K. F. bands a" _Brl^Jon:s^^^h^|s^/,
^50^rM
. oin.
^1 288 Mc/s
^:lland'DavId~'Berrywho
intends to'. operate on
^•e^loome these chaps and hope to hear a lot of them. ^^^^
'Two projects carae up for discuss ion-a-fc the last Meeting:-
A sattllite tracking installa*. io» which the V. H. F.Group^ho^^^set
, ^oo^arfuiu re7ouruohiefoonsultant^ni^be^ul^Ed^r^^^^
S. ?t^^k i^^^un^ion^ith"the-looalM°°"watoh_Gro^^f,t^ ^'-^^
n
•S elF^no^udIng
I^^SoI^L^^^^^^our^^en^^^^";-^"
"boun ( cingwlll^e,pl^e^,
from-balloons a series of these
Se ^i^^^Ubr^h^^r?u^ an^Pr^^
^l^D£Ayb^on'^ll^erby~^
144'Mo/s Amte^^peating satellite. <
Li-bial^raoking will probably be done on 108. 3^ Mo/s .
2',; A-^o^t-re.transceiver desig^^d^^s^e^^^
wnr^ablel'inore":bo^flke^he ·aoquairtan.
band. Ge of th&s This
hope,
.•p.. .•.,
'^-
The Mon-bhly Bulle-hin.... of The Wireless Ins-bitu-fce of Australia.
Ta'smanian Division. Page. 2.
enable us -bo have on hand, for -bhe use of -the Ins'fc.i-fcute if required, a
nutiiber of identioal oomple'fce'2 rae-fcre fixed/por-bable s-ta-bions which oould
"be used for emergencies, "field days, Reggfe'tas, Boy Soou-bs e'to, as v?ell as
oross-town oominunioat. ion. YJ'er 11 probably also be able to supply these
ready built. However, more of -fcha-b la-ber*
f''- -,
V. H. F. hounds, inciden-bally, did quite well in the reoent Fox Hun-t
VK7%I first; in and VK7Z'AK second. The 2 metre fox was heard as far av/ay as
IIOTJ Norfolk. Yfe'd lik'-:: some tnore hounds nex-b -fcimel
(Signed) Reg Btnme-b-t VK7Si"iO.
S.W. L. GROUP
The nex-b Meeting of -this Group'will be held at -bhe Club Rooms on
.
Wednesday May 10'fch. Kike Jenner hopes ±o be able -bo supply enough material
in the near future zvhereby t;he SJJ'. L. Group will bs able -to have some space
in "fchis Bulle-tin.. I.n., 'fc:h.e.. meabt;imG please-'-ba'ke no-fce •that; there is no extra
sub. required •bo belong to any of •the Groups within the Insti-fcu-fce, all •tha-b
you have -fco do is -bo address your enquiries to the Group Secretaries and
PLS'i.SE enclose a-s-ta'mped addressed emvelope for the reply. For -the S.W. L.
Gr-oup -the Seore-bary is l/Ir. M. Jenner. 20 Church S't, New Norfolk and for
the V. H. F. Group Mr. D Thorne 308 Pa rk S-t. New Town. Hobar-fc.
NORTHWESTERN ZONE.
The nex-b . Meeting ofthis Zone will be held on Tuesday, I,lay2nd*
at; the Burnie Fire Brigade Headquarters, Burnie, at 1945 hrs» This Meeting
will be a Social mee-bing, the . mai.n •bopic being -fche handing over of the
Mobile units and Base Station whioh have .been .built by Members of this Bone.
Supper will be provided, and a good e-vening is .assured. I-fc is und^rs-bood •that;
there will be quite a few of the.... gang. from- Devonpor-fc and Ulvers-fcone going
mobile on -bhe ^ay over.
A Transnit-ber hunt was held las-fc SuQday, Api-tl 16-bh. Only -three
s-ba-biohq plus the fox part ioipa-bed, very poorly attended. Looks like sosie-
•thing -will have -to be done -fco ge-fc the M.V'r. 2one more active again,
(Signed) D. M. Slowaa/. KcW. ^one Seo.
This Zone is to be congreFula-ted on the work which -they have done in
oons-bruo-bing the radio eqyipmen-fc for -the Burnis Fire Brigade Arreally fine
effor-b by all concerned.
OFFICER FOR TEE YEAR 1961-62.
A-t t e Counail Mee-fcing held last; Thursday, April 20th, •the Follow-
iri.g Offiaers wer^ elea. -fced.
PRESIDSICT. • Liir'* T Alien. VK7AL.
VICE-PRESIDENTS Mr', C « Harris s on. VK7CH.
Mr'. L. 'Edwards. VK7.LE.
I&r. D. Wa-bson. VKTDV'r.
SSC'REIA. RY. Mr. K. Millin. VK7&^ .
T REuiS IIRER! Mr . C. Harrisson. VK7GH.
To save -the wear and tear on -bhe s'fcenoil, the •fcypevtfriter and tny
fingers, you can include -bhe above List in the one con'fcained in last;
Rion-fcli's Bulle-bin.' Thank YOU.
ANNUAL GENERAL M3ETING. AKD1 DIRffiR
This event; is over for another year and was quite a suooess
in everything but; -the finanoi.al side. This was caused by -bhe fao-fc •bhat
•i there were. -ben aocep-fcances for -the Dinner from Me.nibers v?ho eventually
. di,d no-fc'arrive and did not p&y. tiheir Dinner Sub,, ei'fcher. One- of •b he reasons
we. asked for early no-fcifioation of-fchiise in-fceading--bo be present; was -to
finalize oa-fcering arrangemen-fcs. Tf'Thibh should ^ be fairly obvious. Next Dinner
S UBS. • PAYAB LE•IN A-DVL IX; S. NOSUB . ^ ' NO DI I'nffiR.
IF YOU DID NOT PAYTOUR'DIMEE SUB. -BUT NOTIFUiD YOUR JMBNTIOK OF BEIIT&
PRESENT? YOU GA.IT. STILL'SEIID THE SUB ll^WSS
SUITOAY BRQ.\DCAS¥S .
, :-., n fu-fcore -the Sunday Broadcas'fcs will be re-transmi-b-bcd on ^.672 Mo,
through s-fca-bion VK7CT . -Terry will appreoiate repor-fcs on psoep-fcion.
The Mon-thly Bulle-bin of The Hir&less Ins'bi-bu-fce of Aus-bralia.
'' 'T&smanian Division. Page 5.
COUNCIL I,'IE3TIKG
The Hext. Council Meeting will be held_at -the residenoe
№, C. liar ris s on. _?OUEC. IL_^®ERS FLE1^SE FOTE'
l&terial for inolusion in the June Bulle-bin mus't be in -bhe hands of the
Secretary on or before May 201;h. nex-b. DON'T FORGET
FOR s^°2.only Command Reivers. .5-6 LIo/s and 6-9^.io/s._B^ ^h^e ^ ^^
^o^Stedl
"t7l2-Tolt'heaters'and'a gain control and B. F. O. ^s^een_ad^d
^ueaohrT herri s''a''common-powor^upply and^speaker f°r, sam^ ^^a- set:
^^rlsp^^valves'; "Pr'io" £15 ±he lot:'.. ^pFly~№ K. Johnson, VK7RX
54 Tower Road, New Town.
Some meters may have heard. VF:7CE op^^^'-[l?bne.nar"f, on wfJ&G^.
^m^y^W^ 3^5 a^'7'MG/s'bands, and this'brief description of the rig
used tnay tie of in-fcerest.
^^rlT?!p65l Converter 6AN7, I. F. 6BH6, BFO. OC45, Det. O.x85, A.F
Tran. ^tcr6c4 C%talT: 6C4, P-.. 6T6.^peeohA^p.^U6. Mod. 6^e.
Por-er Supply: Tw'o'Q&211 reo-fcifiers, V6066 vibrator.
the battery is a problem and -bhe. rathor m&xed oolle»-^
-bion of valve^'liodes and transistor are^he result of ^for^^^^nimize
ba^^ery drain^hil^'using parts °",hand^f possib^.^^^^r^^^
^ns™^ro^i>s"905"m7anl transmitter 600 raa. on №. and 1. S5 amps, on Phone
^C£—LL Built on a 8t" 3c'6" x 2" chassis v, ith a Sf' x 4-f"^panel ^^hioh
^ere is i^roo^for'a 5" speaker, ^io"alvoluine
vernier^ndse^an^nd^^
^iafs ; pton7jaok, 'BFO'on/off switch, oontrol
and^and^witoh.
.
^ ?"Mc~ band'oovers approxiEfitely^.5 to 7. 3^o. en^Un^
reo option. atLso' qrt he"3call shipB ^frequenoy6280, ou-b ra tions ^555^an^
1132 iS^S?^^
s-bage.
•"Chassis, is Bf' ^6"^- ^^hthc^anel^he_sai.e^iz^as^^
.,.,. -:. receiver. Onu^^h^culre"the"^ko';3ac^ ^e ^^n,G№^01^^^CT/Ket
' !'::' ^l^i'.L^e?l^i^h7o^stal^ook^, ^3_^^di^e^^t^ s-^toh ^
K^'j^k,lo?rp l^r^er7pea"'lampRF'indicatory PA tune, band. and
''sl ^^s^^^i^^^^
s^sss^:-
£=-^£El£'Ihl. i. b.ilt in . 6-.6 ^. ».t, l lox, on the fto,rt^f_.M^
there is the s endAec elv rs wit. ch and Ter^lead^oc_te^^^o^^^^^
pC
^?an^for^r"is/ use^'with'vibrator'for 6^°l\OPCTation;» and^illoon,
^"fiors 7ch^nKlnK from 6 vol-bs DC -bo 240 Volt AC input ^s^ply
/Bi^te"°otfiSin6c£^°Ele^. tt:°^^a,:; ro^ectloi, lelne e^eo^d"
°m
asmitter onT^?^g^^bo^h&^urted^cr^ioal^,
^6rw
^ndtbe^
btre^:^Sem/^ o^^^ri|^|^
and" holds "log "book, pencil and spare ^ystals, and_^l lamp' sey
leads are carried in^he spaoe a-bove the power supply.
Antenna.
^-' The baok stay, which is over 50- long (For the landlubbers the
The Monthly Bulletin of The Tireless Ins-bi-tu-fce of Aus-tralia,
Tasmanian Division. Page 4.
stay that runs from the top of the mast •bo -bhe. stern; or blunt. 'end of -bhe
ship'. ) has been insulated and a lead of about 20' runs under the deck •to
•fche cabin where the rig is used.
Results have been exoellen-b, '-the best DX being W on 7 Me/s .
Frosi obserTa-fcions made during-many regular skeds with VK70M from-various
looatic'ns, ranging from Por-fc Davey on -the YJ'es'fc -bo -bhe Sohoutens on the
East Coast, 5. 5 Mo/s has proved -the nios't; reliable during both dayligh-b and
dark and very seldom was a sked missed . owing to oondi-fcions. Mos-b S-ba-fces
and. 2L have been worked on 3. 5 Mc/s on CW and -bhe phone has been reported
fr ora 2,L,
The rig is also used on I'fe-fc. ional Fie. Id Day's, as a s-bandy-by a-t
home, and . v/as used mobile on our trip "bo Uj.vers-fcdne for last; year's Annual
Mee-fcing. • '
ANTENrU COUPLER FOR aYI'TOOM LII;№THS 01'' 1.?IRB.
-Th^-pT-^upTer has--Jbhe repu'ba'tion of being able to load anything
bu-b in its usual form -this is no-fc so and i-b gives bes-b results when'i'b.•.. ;..
fe;:ds into a non-reao-fcive line of -bhs oorreot inipedance. In some oases it
may give the appearance of loading, but -bhe pov/er-is being aa^3.at>§<8e^ tin
the coupler and not radiated.
The coupler -to be described is useful for .'field days, for mobile
. us'", • and. 'evo'n for homo use.. when it is desired •bo use a random length of
wire.
Ci'rouit;, '.
/Q -^
From /^ / An-benha.
•brans mi-fc-ber. - /
Ear-fch.
C Approx, 150 pf. Max. spacing aooording •to power used*
L 50 -burns 2" diame-t'or spaoed 10 turns/inoh* 16 g. -tinned copper.
A clip lead is used for shorting out unused por-fcion od coil* Another
clip lead'oonueo-fcs -bhe ,o:ond®BQer. t'p either •the inpu-b or •the pu-bpu^ of •the
ooil.
0 era-bion. "
If a good shor-b ear'bh'is aTailable -fchen. it' should be used, this
'may be useful in -keeping :t;h'e ohass. is o'f'the •transrai'fc-ber "cool" -bo RF with
some IrngthB of an'tcnna. To •buns up some indio'ator' of RF will he required*
This oould be a :RF atnKie-ber of suitable range. If "fche leng-bh of -bh'e antenna
is suoh tha-fc a current; niaximum is near tihe ooupler a. pea lamp • can be
oonncc-fced in series with the antenna or across a short length of i-b,
depending on •the power. If a vol-bage maxitnum is near -bhe ooupler then a
neon bulb can 'be hung on the gutpu-fc -tierminal. In any ease -fche impor-fcan-fc
:i-bhlng is ••t''!'ia-b for. any given length of. wire and frequency taaxitnuci indioa-bion
' on •this device v/ill indioate ^maximum power' in •the an-tenna. This will not
apply if -bhe indica-b. or is a onnc'c-fced further. baok -fchan . poin't "B".
TUNING. . • •'•
'Resonate -the final'and al-berna-fcely ad-jus-b C arid -the -bap on L for
iTaximuEi ou-tpu-fc indication for a given DC power inpu-b, keeping -the final
in'. rssonance* If no sens'e oan be •o'btained -br. aasfer +;he . oondenser •bo •the
inpu-b of -the c'-oil and •bry again.
As s. -guide •the following number' of -burns is .. somewhere near righ-fc,
1?ire length, . • frequency. Turns.
5.5 14 21 28
7i
100 f-b. 18^ , 1,
4i i;s
It
•9'0 "
'&0.."
II
It
AA
11^ 5la
ft
It
70 ".. (i
15i 5i-e. It
60 "
50 "
II
<1 .
211
lsi 6-|a
n
t»,
40 " It
lli 5^-a
n
30 "
20 " ;•
26^ 2-^a
7i
6j
&?
It
tl
a indicates oondenseF. o. onneoted''±o inpu-b of ooil,
.
This; unit v^ould be qui-fce useful'also . Used. in oonjunotion wi'bh t;ho tl
fil'fccr descri'bed in last' moti'fch's'Bulle-fcin,
All for -bhis non-bh.
73
K. E. Millin. Hon* Seore-tary.