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T. H. L.... WIRE. LESS . INSTITUTE
-OF AUSTRALIA
Tasnojii.ari Division.
Box 85U. G. P. O.
.
HOBART,
M-O^THLT BULLETIN "
Price Gdo NOVEMBER^^GO.
PRESIDENTo
SECRETARY.
Mr. i. -Alien VK?AL, TRSASUKERo 1'. ro
'
Co'Millin,
Mr Co Harnason, VK7ICA
VIC7CHo
MEETING PLACE, 147 Liverpool St, Eo^o.rt
GENERAL MEETING;^ The next General Meeting will be held at the. Club Rooms,...
iverpool S.t£eet.... pn. W.ednesday November 2nd. at 1960 at 2000 hrs7T"
LECTURE^ ^ _^^ ^The Lecture this month is-not quite definite "bu-t; in all
pro. l3aT3ility^will materialize OK and will deal'with"the~use ot~'l7v.
comPonen-fcs in amateur equipment. So come along and then you will also
b^^!^J;-°_fi^d. ?ut who the Lecturer will "be. It should be a very ;.
interesting evening. As for last month, bring as many~visitors''as
desire the more the merrier. . , . . ' " ~" ~~"t/ . ~~-"'-~' '-" Jfr.^,
N. W. ZONE;^ , ^ ^ The next General Meeting of^this. Zone will he held on
NoyemlDer 1st at Headquarters Burnie Fire Brigade. "'Note-change~of"venue.
All members urged to "attend.
NORTHEEN ZONE: The next Meeting will -be held on November '11th. at.
the resideric. e of Mr. Max Chaplin, 54 Bald Hill Rd. at 2000 hrs. " '
ADVERTISEMENT. S IN BULLETIN: At the last Council Meeting the following
mo ion. was passe -.
"". /That a charge _of Two Shillings and Sixperice (2/6) be made for
'^For Sale" and "Wanted to Buy" paragraphs inser-bed . on behalf--of
Mem'bers in the ^Monthly Bulletin ".and".the usual . connni. ssion of . 1.0^..
charged on goods sold as a result of any "For Sale" advert; -":"" '.
Proceeds from^advert ising to go to the Building"Funds,"'commissions
IQ go as usual to -the Equipment A/C."
Members, are-relied upon. to pay the said 0^ -fco the HOn. Tre'a-surer
but ALL advertisements MUST be EEPAID.
S. W. L. GROUP? ^ The next Meeting o.f -this Group will be held on Nov. ' 9th.
n_interesting everLirig has been arranged and will be a visit'to an"
undisclosed p3-. ace. I have a. rough idea where -this is and it will be
well w rth the_effort of getting-to this Meeting, both S. W. I. and
Full. Members alike.
V. H. F. ^GROUP: This 0-rou. p will meet on Wednesday Nov 16th same as the
5. W. L. Group at the Club Rooms No informa-bion on activity this month
as"yet.
"AMATEUR-RADIO. " Some doubt seems to exist in the minds of some of our
more recen members. concerning "Amateur Radio". The sub to. this
Journal is included in your Annual Subscription. The reason you do
not receive. it as soon as the Monthly Bulletin is because. it takes
considerably longer to have your name placed on the Circulation List
as said Iiis-b is always sent'to "A. R, " at least a Eionth . ill, advance. .
The sam'e applies to Me. mbers who have had their names deleted as- a ' .
result of no'n-paymeht of Subscriptions,, it takes a while f.o.r it'^o get
golng again^ This latter one could be avoided by the prompt'payment
of^subscriptions, to say nothing of a . lot less work for^yours truly?'-- --
Also-'considerably less expense on the postage side. " -'- ---. - -
.. 2/
-2- . . . ;
FUNIi RAISING- GO?ffiiITTEE: The Club Room Fund Raising Committee has s-e-t;.
-i"sel-- wo targe s. , The first is to^raise as^a preliminary sum
the'amount of £2500/-/- and -bhe^ second target is^to do it in^3 years.
When"it"Ts realised that'two' shillings p^er'week for 3, years from .
each Member in VK7 will produce £2250/-/-, both targets are not
realisation.
The Com-nittee has many ideas how to raise the
money. First, we ask you for a donation^ The more we_fet now»
the" greater"income the fund can produce, which in turn means_. the
iess°we~individually have to find, so please send your_donation
now, . either personally to -the Treasurer to to Box 85U, G-. P. O.
HOBART.
Other fund raising ac-bivities planned at present
are as follows ;-
20th November 1960 A FIELI' DAY, commencing from the CUSTOMS^HOUSE
HOBAM at 1000 hrs oTTS^^'sf^t'h November. ENTRANCE FEE - 10/- per
ca^V"" Hidden transmitters/3515 KCs, and on the 1'4 Megacycle, band^_
Get your mo'bile equipment ready. Bring along your mobile ^transmi'tteT"
as'well", -and have ^lot s of fun. " Bring your lunch, ^and^the family -
it wiii7 ^e~an--all day affairo If the weather. is_doubtful on the day,^
or impossible, listen to VE7ZZ on 7073 KCs'at 900 hrs for any decision.'
7tli December 1960 AUCTION AT THE GLTO ROOIV^, 147 Liverpool Street,
a ter he enera MeiHig, rake a gift o ^hat surplus gear you
have around the place, and we will sell it-for the benefit of the _
"Fund. To help'us ciassify and tag the gear for. better presentation
bring your gift gear along; to -the NovemTser Meeting.
16th December 1960. CABARET. The Gommitt'ee has organised a Cabaret
ai'ihe'H6TEL-BELl1 ANA, commencing at 2000 hrs on Friday night, 16th _
Decem'ber. ADMISSION- 3/- per~single ti-cket, 5/- double pi cket;,^
A'iate'ij-cence wi e operating. "Bring yozir'XYIj and or/YL, friends^
_
and~an. y-memT3ers of the public you can induce along. All profits go the
Club Room Fund.
TECHNICAL: 100 Y^at-b 50 . Omi DUMt.lY LOAD. A Dummy Load can be a most
useful adJune to . -uhe eq.uipment in your station. The^following is^a^
very simple, low cost dummy load designed' to cope wi-fch 100 watts of RF
©tl'EpU.t.
CONSTRUCTION. Obtain two brass, circular plates of diameter about 3".
flrill a hole in one plate large enough to take the centre of a standard
chassis'mounting coaxial fitting. Around this hole drill holes^in the
appropriate places -fco take the fas.tening: . screws to hold the fitting to
the plate. ^Drill a hole in the centre-o"f the other brass plate -bo
make^a snug . fit for a quarter inch brass rod. This piece of^. quarter^
inch toass^rod should be a little less than. 2" in length,. drill-a. lro. ie...·
in one end of the rod so tha-fc the centre conductor _of -the coaxial
coimector makes a snug'fit in i't. It is a good i&a to. drill a hole
at right angles so that solder can be flowed to hold -the centre
conductor firmly in place. Solder the brass rod'in its hole in the
'bottom''brass-plate. " ^ The brass plates are kept rigid and properly spaced
by tlie use of^ two inch insula-bors between them. Then divide . th.e^..a±r.c.iMi
ference of each brass plate into ten equally spaced sections, ^make
a'small slot in each plate at each of these'markings or divisions, just
large:enough. to accept the wire tail of a. resistor. ^Connect a 500 OHM
10. Watt n.on-inductive-'-type wire-wound resist. or. betwe. en eac'h . of_. --bh.e . ten ..
pairs of slots in the brass pla-fces and solder_the. leads^in^. The ^ob is
now done, except for con. nect. ing the dummy load to -bhe rig .. by coaxrral
cable. 'De.spite the use of wire-wound resistors, ^the reactive^ompon-
e'rit has been found to''be quite low. It is. claimed' tha.t the VSWR is
1 to . 1 up to 21 Megacycles, and only 1. 2 to 1 at 30 Megacycles*
FOR SALE? 676 Valves inounted in chassis
^ &ELOSO V. Fo O. with 6J5, 6AU6 . and.
and panel'with band switched coils., for final. ^Tuning and loading
condenser; also aerial changeover relay .. ' £.8,
All for this months, 73. E, E. MILLIN Hon. Sec,