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Bulletin issued by the Northern P.0O. Box 1010
Branches of the Wireless Institute Launceston
of Australia, Tasmanian Division. Tas, 7250
September 1976
Vol.6 No.6
Registered at GPO Hobart
for transmission by post Price 40¢.
¢ as a periodical. Category B.
_MEETINGS
September 10th Northern Branch, S.E.S. rooms, Charles St. 8p.m.
September 14th North West Branch, Lakins Hall Ulverstone. 8p.m.
Y.R.C.5. MEETINGS
September 11 & 25th Kings Meadows High School, 10a.m.
A.0.C.P. CLASSES
Sept. 13th
20th Kings Meadows High School
27th block B, room 35
Oct, 4th
_
_CONTESTS
Sept. 4/5 Albatross SSTV Contest
Sept. 11/12 European Phone Contest
Sept. 18/19 Scandinavian CW Contest
Sept. 25/26 Scandinavian Phone Contest
Oct. 2/3 VK/ZL/OCEANIA PHONE
Oct. 9/10 VK/ZL/OCEANIA CW
fr el
September 21st Deadline for the next issue of QRM
Page 2 O=M Sept. 1976
ve
by NermanVK/IR.
notes
Northern Branch
Greetings to you all., I write these notes possibly
for the last time as Hon. fec. because even though your
president didn't mention i it, & roluctantly have to give up
f";i
my position, due to some £A forth coming changes in my employ-
ment, but more of that later. Tt 1s possible that Ed VKT7HE
will take up the reins again and continue where he left off,
Also I would like to thank all who supported me in my 'shack
modernisation sale" recentlv. T a1l mave some gear to
dispose of.
Well the August meaeting went off smoothly with
members showing interest in all ol iets raiced. Who said
you don‘t take notice, 30 members. 1 visitor and E1
Presidente were present.
On the inward corresponderce side the most disheart-
ening letter came from John VK7JV vour OPRM editor, who
unforturately felit he had tc *enaor his resignation, for
personal reasons. John has c{fered to put September's ORM
to press to asesist and allow t- got another volunteer
to carry on this very worthwhile prcAu“‘lon. Let's face it
YOU NEED ORM and so does Tosmari=z. If that goes, what's left?
The insert!.
By the time this goes *+o press, the progressive
dinner will have been held. All tickets were sold with no
effort at all. Perhaps we will he able to organise another
or something similar for the not too distant future.
Some discussion took place on a change of frequency
of the 80 metre Sunday broadcast from 3672 to 3570KHz. This
would bring the broadcast into the Novice band and allow
them to take part in the proceedinas. A sensible suggestion
if I may say so. And as some would say "good, let's make them
welcome"
The proposed lecture on the Radar Speed Gun will not
vet take place, two reasons were given, the first that it has
not been legalised yet and secondly the police department
have not finalised their technical side.
It is proposed to hold a film cession in October,
similar to the one held some time ago at the Postal Institute,
This time a list of some several hurdred films was passed
amongst the members and suggestions weare asked for the type
of programme members desired.
Lindsay VK7ZLD in his usual laconic way assured the
meeting that the Hamfest organising was going along nicely
and that she would be right mate. Knowing Lindsay, I am sure
that it will be. But what about you caravaneers, who wants
parking space at the Hall site? We haven't received your
applications yet! P.0O. Box 1010, Launceston is the address
for them.
The treasurer Peter VK7PD reported bumper sales for
the last two months and mumbled something like $4023 with
expenditure of $3373. The equipment store manager said some
monies were owing by members and a threat by your scribe to
rublish a black list had his receipt book going mad after
and during the meeting. cont. page 4
Sept. 1976 ORM Page 3
Notes from the North West Branch.
The monthly meeting was held in Lakins Hall Ulverstone
on Tuesday 10th August at 8 'o6'clock. There was a good turn up
of members with 15 full members and 8 associates. The president
Ian VK7ZIE and the secretary Max VK7MX were in their chairs.
The minutes of the last meeting were read and confirmed.
Apologies were received from Kirby VK7ZKC and Lindsay Johnson.
A hearty welcome was extended to a Southern member Dick Ferris
VK7ZDF who was up this way and called into the meeting. Also
Paul Stott who at our last meeting applied for membership to
the WIA, was advised that his application had been accepted.
The meeting was a fairly lengthy one and closed off at 9.15p.m.
followed by supper. .
Following supper Brian VK7ZBL showed a very informative
and interesting collection of arial slides, taken by him on
some of his arial trips to various parts of the State, A feature
of some of these shots were the ones taken over Western Tasmania,
how rugged the West looks from up there. I think we are all
looking forward to seeing them again in the not too distant
future. A big thanks to you Brian, from us all. As well as
being a good radio and club member, painter, are fast becoming
a first class photographer. The evening closed off at 11.00 p.m
with the usual two metre mobile contacts by members going home.
I was unable to attend the meeting, and would like to thank
our old friend Max VK7MX who supplied me with most of the
happenings at the meeting.
We would all like to extend our congratulation to
Kirby VK7ZKC and Gaye on the arrival of their baby son Dale
Thomas, another budding on air voice in the future. Going on
some of my two metre listening recently I think Kirby has been
celebrating the arrival of Dale with his Wynyard mate Brian
VK7ZBL, so you had better keep this issue hidden from Gaye
if you dont want her to find out.
We hear that our member and friend Cliff VK7CD has
been having his share of troubles of late. First of all its
rats or mice, then after getting up late one morning he was
looking for a sock for an hour only to find that he had the
two on one foot, naturally he was late for work. We now
hear that he is a high pressure salesman for a well known
brand of fly spray, he is now cooking his steak in instead
of the latest and correct pressure pack of Pure and Simple,
Charlie VK7CF, being an old seaman, swears that the rats on
some of the ships were that bad they would eat the buttons
of your clothes. He has advised VK7CD to use plenty of traps
with walnuts for bait, maybe a tip here for anyone else with
a rat problem., Bob VK7ZJS was heard saying he has a little
trick up his sleeve for modifying these rat or mouse traps,
so contact Bob if you have a rat problem. Enough of this
ratty stuff,., Typicaliisn't dit.
The remembrance day contest was very well contested
here in the North West, Max VK7MX broke his own record for
contacts by quite a fair margin. The two metre boys were out
in force and they were rather lucky, the band opened up across
the Strait and a lot of interstate contacts were made. A lot of
North West call signs were heard both day and night.
73 Lindsay Johnson
Page 4 ORM Sept. 1976
Northern Branch notes continued from page 2
Mike VK72WW resigned due to trade-training as our
WICEN co-ordinateor, Col VK7KW quickly took up the challenge.
Thanks Col, a volunteer is worth etc. etc,
Reg VK7KK is seeking extra help to make up a roster
of teacher supervisors for the YRCS classes. He has had an
offer from Peter VK7PD and Bob VK7ZRF but still needs more
help. Robin VK7RH is having trouble with QRM from a local
diathermy device, other than a suggestion to pull the HEC
fuses of the offending party it wag suggested he contact
those intrepid gentlemen of the big stick who when not roaming
the island reside in Montpelier Retreat,
Finally some further discussion took place on Club
Rooms. Following more discussions with the L.C.C. it was
learned that we could only expect a five year lease on Burke St.
If we accept this and spent umpteen dollars on decent chairs,
heaters and carpet and a bit of paint, the executive thought
it wouldn't be a good proposition, but the meeting in general
suggested, nay, instructed some budgetry figures be got on
the cost of the above items, added to the rent and to be
divided by 60 (the number of months in five years) to give.
a more accurate figure on what such a venture would set us
back. As one gentleman suggested we can always take up our
carpets and chairs if at the end of five years our lease was
not renewed. I guess we could also use any new paint work for
Graffiti! So the executive did not get it all their own way,
it's back to the drawing board for somebody.
That just about sums up the basic points raised, so
those who did not attend can see they missed out. See you
at the next meeting.
The evening finished with a film and a sale of donated
"JUNK" which raised some $48.50 for the clubroom account.
One final quip, when are the buyers of some of those
high power valves going to get air-borne and fire up those
devices,
Will Joe VK7ZGJ drop off that "Z"? Read the next
instalment.
73 de Norman VK7NR
6 metress The midwinter DX season is almost past. The only
recorded opening via sporadic E this month was on the 12th
when I worked VK2's, ZFB, 2ZAY and VK5SU/2, Barry VK2ZAY said
that he had been hearing our beacon for about 3 hours.
The weekend of the RD contest VK3YBE was worked by
several Launceston stations, Malcolm VK7ZMM was using a IC502
and obtained a 5-4 report.
2 metres; This band has been very active for this time of the
year. It was open to VK3 for most of the RD contest, mainly
to South Gipsland and repeaters., Stations worked on SSB by
Kevin VK7ZAH and myself included VK3's, 2XO, 2QV, AKC, YBE
and YJI. Again on the 19th VK3's, ZXO, YJU and AKC,
Kevin has a sked every night at 2000 and has worked
VK3ZXO for the past 7 evenings.
That is all for this month.
73 Joe VKT7ZGJ
Sept. 1976 QRM Page 5
DXand HFbands. from Col VK7LZ.
Only ore man's opinion so naturally only a small amount
of time can be put aside to listerning and a large portion of
the 24 hours each day 1s of necessity not monitored, so other
sources of news from members would be appreciated.
General conditions are still very poor and have shown
no improvement since last month,
1.8MHz; Has been practically deserted on csome nights, however
the odd VK5 or 2L is active on phone and CW but you’ll have to
look for them. The only DX heard has been W4EX, WBANO and
KL7HAQ, all on CW around 1000Z. This band should start to
improve soon.
3.5MHz; All reports seem to indicate that this band has not
come up to expectations for DX. The odd JA or W has been
logged on CW but the only unusual station heard was KG6SZ
Saipan Island, using CW on the 5th August with a 569 signal,
TMHz; Until I checked my listing my comments would have been
"very poor', however a count of pretfixes heard produced the
following, F, HI, FW8B, KG6, Kv4, C2, HK, VS5, KL7, VK@, DL,
I, FX, VE, W, G, GW, XE, VSe6, HM, HP, UAg, OA, CM, YV, 8R2,
6wW8, Ja, CT, KZ, YU, PJ2, OK, EA, ON, ZL, HB9. i
37 countriesin 7 continents so there is still DX if you
delve for it both on SSB and CW. Those heard on SSB included,
6W8, B8R2, DL, G, XE, FK, F, CT, Kz5, PJ2, JA, W and VK@, once
again all continents heard so don't rubbish 7MHz. All these
stations were heard between the hours of 0630 and 1430Z.
14MHz; Being still without a beam this band has been neglected
and other than hoards of VE's and W's the only other prefixes
listed were, VR, XE, YJ, FK, DL, 1, G, VP1l, and 3D2, however
for the DX enthusiast 14MHz should never be overlooked.
No listening has been done on 21 and 28MHz.
QSL information. KG6SZ via JAIEMX, 3D2ZAJ via W6SC,
YISKW via K6KII
FW8CO, C/o Airport, Wallis Island.
Two interesting OSL's have been sighted this month,
XJ32Z/1 ST Paul Island, 7J1IRL Okino Tori-Shima, if you want
to see something unusual in a DXCC country, this card is
worth seeing.
Latest information from the Swiss Federal Observatory
give the predicted smoothed sunspot numbers for September,
October and Novemb-r as 6, 5, and 4 respectivily so there is
one consolation, they can't cet much lower.
73 Col VK7LZ
00000000000co00
Yaesu FT101B, must be in good condition and include
handbook. Phrone,wWinston Nickols at {(004) 372582
or at business {004) 3149608
Page 6 QRM Sept. 1976
A144MHz LINEAR AMPLIFIER.
Greg Taylor VK7ZYT
94 Berriedale Rd., 7011
There are several fully solid state, low power SSB
transceivers available commercially now and these have made
a big impact on the activity on the VHF bands.
However in most cases the low power is a serious limit-
ation to the serious DXer. This also applies to the many home-
brew exciters and transverters with only 1 - 3 Watts PEP output.
This amplifier has been designed for use with SSB drive
from 1IW to 5W PEP and 10 to 12 Watts PEP, depending on the
configuration constructed.
The variations to the amplifier are as follows:
1) Driver stage only using a 2N5590 will deliver 12W with
1.5W PEP of drive.
2) Driver stage only using a 2N5591 will deliver 20 -22W
with 2W of drive.
3) Driver stage using 2N5591 and two 2N5591 in the output
stage. This combination will deliver 50 - 55W with 2W
of drive.
4) If the drive available is only 1W a 2N5590 can be used
to drive two 2N5591's to 40W output.
5) The output stage only can be built using two 2N5591°s
and will deliver 50W with 10 - 12.5W of drive.
It is only necessary to construct the relevant section
of the P.C.B.
A few years ago I used 2N5591's in a broadband linear
with very pleasing results. One aspect about using these
transistors in linear service that became apparent is the
lower output power obtainable compared with the output in
class C. Although 30W or more can be obtained in class C
service, only 20 - 25W can be obtained from a class AB linear.
The use of a 2N5591 as a driver may seem extravagant
but this is necessary to keep intermodulation distortion to
a minimum by allowing the driver to loaf along. This allows
the output stage to be driven further into the gain compres-
sion region before the combined distortion of the two stages
becomes excessive. If the drive available is only 1W PEP
and 40W output is satisfactory, the 2N5590 is quite suitable
as a driver.
Two important aspects that must be considered when
designing and building transistor linear amplifiers are bias
and supply regulation. The power supply should be regulated
to within 0.25 volt for load variations from 1 - 10 Amp.
This includes the voltage drop due to leads, fuses, relay
contacts and terminals.
To avoid these problem areas, I suggest:
1) very short and heavy leads between the power supply and
amplifier,
2) a short circuit protected power supply.
Sept. 1976 QORM Page 7
3) instead of switching the supply directly, switch the
voltage requlator at a low current point i.e., the base
of the main pass transistor or driver.
There are two methods of biasing the RF power transistors,
a) forward biased diodes
b) transistor regulated sources
The transistcr bias supply is preferrd because of its
lower output impedance and wider degree of control over its
operating parameters. However it is more complicated than the
diode method and was considered unnecessary for an amplifier
at this power level, where forward biaced diodes can provide
good results,
The dicdes are in contact with the transistor package
so that the bias voltage will track the transistor base/emitter
voltage variation with temperature.
Construction notes.
The amplifier is built on a double sided fibreglass
board to aid stabilityv. The only active track on the underside
of the board is used to link the supply rail between the two
output transistors.
The P.C.B. should be mounted approximately Z2mm away
from the heatsink so that the transistor leads rest flat on
the copper without bending. Before mounting the transistors
the leads should be cut to 3/8 irnch length, then the outer
1/8 inch bent up vertically, this e¢nables easier instalation
and removal,
The 1000pF chip capacitors are soldered to the P.C.B.
by first tinning the copper track then lying the chip
capacitor on the tinned area, aprly the soldering iron to
the top side of the capacitor untill the solder melts under
the capacitor.
The links between both sides of the P.C.B. are short
lengths of 16 B&S copper wire scoldered to the copper.
The three bias diodes rest across the emitter leads
of the transistors with some silicone grease or heat
conductive glue between them and the transistor,
Tune up. To adjust biass
1) terminate the amplifier input and output with 50 Ohm.
2) disconnect the supply end of R3, R8 and R9,
3) apply 14.5V DC to the amplifier via a 250mA meter.
4) connect R3 to the 14.5V supplyv berore the above current
meter, 1.e. do not allow the current through R3 to
indicate on the curvent meter.
5) adjust the value of R3 to give 100 - 120mA of Ic, then
disconrnect the supply from R3.
6) repeat steps 4) and 5) wiih R8 and then R9, each time
leave the resistor disconnected from the supply after
selecting the correct velue, The Ic of TR2 and TR3 should
be set at equal values between 100 and 1 20mA.
Page 8 ORM Sept. 1976
7) disconnect the supply and solder the three bias resistors
in place. Keep them away from the P.C.B. and other
components as they become very hot.
Tuning the driver stage:
1) connect the output of the driver to a power meter. If
possible keep a load on the output of the output stage.
This stage is quite stable without a load, but it pays
to be careful.
2) connect the output of the exciter to the driver input via
an SWR bridge or directional power meter,
3) apply power to the amplifier,
4) apply CW drive to the driver at 0.5 - 1W., Start with C2,
Cl0 and C11 at half mesh.
5) adjust Cl0 and Cll for maximum output power.
6) adjust C2 for minimum SWR. It should be possible to achieve
better than 1.05 : 1, Minimum SWR should correspond to
maximum output power.
7) increase drive to a maximum of 2W and repeat the adjustments
of Cl10, C11 and C2. If necessary adjust the spacing of the
turns of L3 to obtain maximum output.
Tuning of the output stage:
1) remove the load from the driver and connect to the output
of the final stage.
2) join the links between the driver and final stage.
3) set Cl4, C27, C29 and C35 to half mesh.
4) reduce the output from the exciter to 0.5W.
5) apply drive and adjust C27, C29 and C35 for maximum
output power. Then adjust Cl4 for maximum output.
6) repeat the adjustments of C27, C29, C35 and Cl4 for
maximum output.
7) increase drive to 1W and repeat step 6)
8) increase drive to 2W and repeat step 6)
Do not readjust C2, Cl0 or Cll. Do not attempt to tune the
whole amplifier in one go.
If the drive available from the exciter exceeds 2W P.E.P.
insert small attenuators between the exciter and driver stage.
Use standard 50 Ohm attenuator networks and use resistors with
power ratings consistent with the power being dissipated in the
attenuator., Alternatively use length of lossy coax,.
If the driver stage only has been built maximum drive
for the 2N5590 is 2W P.E.P., or 4W P.E.P. for the 2N5591,
Operation.
Ensure that the antenna to be used has a very low SWR
as any mismatch will degrade the output power and distortion
products.
Sept. 1976 ORM Page 9
Do not try to achieve more than 50W P.E.P. output as the
amplifier will be very non-linear above this power level.
Intermodulation tests will be conducted toward the end of the
year and these results will be published as scon as possible.
PARTS LIST
TR1 - 2N5590 or 2N5591
™2, 3, - 2N5591
D1, 2, 3, -~ Ferrite bead 5Smm x 3.5mm 481 ferrite, these
are not particularly critical to type.
Cc1 - 18pF disc ceramic NPO 100V
c3, 6, 18, 19, :
23,24,31, 32, ~ 1000 pF disc ceramic
c5, 7,21, 17.
25, 33, ~ 0.,01uF disc ceramic
c4, 8, 20, 16,
26, 34, - 4.,7uF tantalum capacitor
c1i2, - 22pF disc ceramic NPO 100V
c28,30, - 68pF disc ceramic NPO 500V
C1l3, - 56pF mica encapsulated
c2, 10, 11, 14,
27, 29, — 5-65pF Philips 808 series
C35, - 60pF trimmer Philips 809 series
co, 22, - 100ur 16V tubular PCB mount
Cl5, - 1000ur 16V tubular PCB mount
c36, 37. - 1000pF chip ceramic capacitors
R1 - 22 Ohm % or % Watit
R2 - 3.3 0hm 4% or s Watt
R3, 8, 9, - select on test, 5W wire wound, start
at 100 Ohm. sec text.
R4, 7, - 3.9 0hm 4 or & Watt
R5, 6, -~ 27 Ohm % or % wWatt
L1 - one turn 20 B&S tinned copper, 1/4 inch I.D.
L2 - 3 turns 20 B&S tinned copper, 1/8 inch I.D.,1/4 inch
(long
L3 - 2 turns 18 B&S tinned copper, 3/8 inch I.D.,1/4 inch
(long
L4, L5 - one turn 18 B&S tinned copper, 3/8 inch I.D., with
(3/16 inch leads
L6, L7 - 6 turns 18 B&S tinned copper wound over length of
(neosid F29 slug
L8, L9 - one turn 16 B&S tinned copper, 3/8 inch I.D. with
(1/4 inch leads
€43 Cis (25
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Page 10
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Sept. 1976 QRM Page 11
Page 12 QRM Sept. 1976
TWO IN ONE POWER SUPPLY,
In 'Radio Communications" technical topics section Pat Hawker
G3VA comments on & power supply dodge that is so simple that
it is difficult to believe that it is new, yet it is one that
he can rlot recall seeing before, it is described by Charles
R, Winchester (Electronice Design, No4, 16 February 1976):
With the aid of a single pole double throw switch, a
centre tapped transformer and a bridge rectifier it is possible
to switch between two output voltages, one roughly double the
other.,
Ifl*fi_fi?fij:g%ll
With the switch as shown tne arrangement is that
of a bridge rectifier using the full output across the
transformer secondary, When the switch is thrown the
circuit becomes a full wave arrangement, using the two
halves of the secondary winding and 80 providing only about
half the output voltage.
Points to note, The filter capacitor must of course
be rated for the higher of the two voltages. In the second
configuration two diodes remain unused, but as they are
reversed biased there is negligible leakage current.
Copied from the RSGB "Radio Communication" May 1976
s -- —— " G e- GS S SS S G S A S M SR S W e N G NS G S S S S g G S G S S e e S e e S S M T eS G
FOR SALE . FOR_SALE
_ FOR SALE
IGL 2metre transceiver, includes 25W Dick Smith final, 4 ch.
switching and search oscillator, crystals for repeaters 2 and
8 and ch. 40 $120 o.n.o.
Graeme Reardon VK7ZGG, 2 Trent St., Youngtown 7250
Phone (003) 469455
- eo gS -
Playmabter, quadraphonic amplifier,-lsw per channel $150 00
J&H beltdrive turntable, B&O cartridqe. all bal, arm $65.00
P.E. turntable and base = $100.00
RCA remote contrel unit H $8.00
6UP, 432MHz converter with AF139 pre-amp -+ $10.00
Marconi standard signal generator TF1446 $30.00
Joe Celsten VK7ZGJ, 40 Lavender Gr., Phone 443882
Sept.
1976 COMMUNICATIONS Page 13
COMPONENTS AND KITS
from
AMATEUR COMMUNICATIONS
ADVANCEMENTS
P.0. BOX 57, ROZELLE 2039
45W TWO METRE BOOSTER AMP.
.
i xt aas teatured in the April issue
z tFusvonmics Today International page
e denvers 35 45W output from
Lt COW drve on a 13 6V supply It
foatrestne "NB60O84 diode changeover
Swo PG simiple construction
only
o- $26.50 ! ‘ * +60c P&P
f Heatsink . .. ........ $2.50
: +60c P&P
The 45/W two metre RF power amplifier The 2N6084 transistor :s visible = the centre 1% the
p.c. board. The mica compression trimmers located on the right hand side are for runing the nput *ho..
on the left for tuning the output. The printed inductances are readily visible. The two quarter wave coax
lines are visible at the top. They may be coiled up as shown or conveniently arranged in some other way
Note that the components are soldered on the copper side of the printed circuit board
RF POWER TRANSISTORS SPECIAL CAPACITORS FOR RF
APPLICATIONS
We are proud to present these premium These are suitable for RF tuned circuit € metal CIad
quality RF power transistors by C.T C DC blocking and bypass applicaions to
They are rated to withstand infinite several gigahertz at power levels to
VSWR at all phase angles and are suit- many hundreds of watts Silver-mica
ELEEKCO trimmers for RF
abte for use n class AB or C circuits up construction rated at 350V DCW Exten
220MHz trom a 12 5V supply The sively used in high power solid state RF pover uses to 500MHz
set of three 1s suitable for a three stage power amplifiers T~60PF ovves 75;
W to 40W power amplifier 1-10 11up Values stocked 35-160pF ... 75¢
1-4 S5up 22-62pF $185$1 75 33pF, 47pF 25-280pF ... 95¢
B3 '? 5Wout $570 $480 68-250pF $195$1 8568 82 100
B'o 12 YS5Wout $770 $710 150, 200 Other types for RF power
B40 12 40Wout $1750 $17 20 270-500pF$2 20 $2 10 300. 470
or $30 the set
te 200MHz, suit HF uses
POST AND PACKING 4‘-28pF 200000 50d
BM 70 ' 2 typically 80W out at 146MHz
trom 9 1 2W drive at 65% collector 30c for 10 or less, 60c for more than ten 10-110pF .... 50¢
efticiency $46 .50 10-160pF sese 50¢
We atso stock the popular 2N6084
made Dy both Motorola and SSS for P& P:20c/5 or less,
only $16 75 40¢ up to 20, 60¢ for more
or tor 10 or more $16.00
We also stock VITRANON, 'Vee-Jem' NPO ceramic chip cap's
POST & PACKING 1s 20c for a single
device 40c tor up to five, 60c for These are suitable for RF applications well into the
maore
microwave region. Standard El2 series in values between
1pF and 1000pF stocked. Sizes below 820pF: 2x1.3x1l.3mm,
820 ¢ 1000 pF: 2,3x1.8x1.3mm. All 50 VDCOW,
ONLY 10¢ each P & P: 20¢ any guantity
144 -432etc
SPECIAL — MA4060 power varactors ror MULTIPLERS,
GBI NRNAREE YA R,
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e
5C Brigbane Iireet,lLaunceston.
Telepiiono o 2253
DONMESTIC & BUILDERS HARD AxD
MARINE & PIULRILIG . oUPDLIES
PAINT & TOOLS
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SEDDON PRESS
354 GRANVILLE STRUET, Ta'lIUS3TON. 725
Telcrhone 1 o191
for all your printin:
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KLECTRICAL BNGINEELRS
SPECTAL1SING IN MOTOR REWINDING AND ASSOCIATED WORK
27 SUNCREST PLACE, RAVENSWOOD
TELEPHONE 391515
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Zlectrics
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135 HOBART ROAD, KINGS MEADOWS, PHONE 444710
FOR ALL ELECTRICAL APPLIANCES, SPECIALISTS IN,
HI-FI SOUND SYSTEMS
CAR RADIO AND STEREO
SEE US FOR A BETTER DEAL, WE SERVICE ALL WE SELL.