[h]~@[h]o 0 - larclub.ca hi-q march 1980.pdf · if you are an avid dx fiend~ you might like to get...

LARC

....J

Lake head amateur rad io cl ub

[H]~@[H]o 0

NEXT MEE TItibMARCH 13 8PM EMO BUILDING

This will be the first roal business Doeting in two nonths. Lc.stmonth the club 11.01(1 tho annunl D_inner Eleeting nt the Royp.l Ec1vmrf'~

Hotel. A good attend~nce w~s recorded with both haIls and th6irguosts onjoying the [18['.1. It was gooc!.. to sec VE3-GG'Z there to'present the FICKLE FINGER AWARD to its new owner. We ViGre alsotreated to sono slides rmd filns of the clubs nctivi tics over thepnst few month. After the moeting, thoro was a trnnsnittor huniJ.The wivos·~.nc1 their hnm husbancLs triod to di:fnCt f' hirJ.(',on BC h~n:l

transi":1itter sOGewh8re in the rOOD.

Every nonth we nsk for contributions to IU-Q. This nonth we c8.110c1Bob VE3-ICRL to give us 8. report on tho Cross Country Ski, Tour thnthe w~s involved in. Not- only di~ Bob cone through with n report,but h[~.'l it c.t our QTH within p.n hour. Thoro shouJJl be sune n.wr'..rc1for this. Bob holds the record for tho fQstcst reply ,to our sODctirlOplen1iug requests.

If your 8re lockine; for the NORTHr.1ESTERN ONTARIO PHONE NET, trylooking for it fifteen Binutos l~tcr thnt usunl. Tho net tipe h~8

beon chnngeJ to 00:30 UTC. This Gives the western chockinssn bitDore tine to finish supper before not time. They nro in tho centr8.~

tine zone so this puts theD riisht in the supper hour. The spotreLinins the saLle ••••• 3750 kcs.

FrOId the locc,l DOC i here is a lasting of the latest new hams thathave joined our hobby in the past few months

VE3-LMF John Stadlander 199 Academy Drive 1 T. BayVE3-LME Ivan Sherlock 110 Margaret stl T. BayVE3-LMD Jean Marc Klein RRi¥3 T. BayVE3-LMC Colin MacKay Red RockVE3-LMW vialter Melnick

VE3-LMQ Scott Kantymir 435 Amythest Cr. T. BayVE3-RCN HMCS VINDICTIVE 1 Royal Canadian NavY$ T. Bay

Lakehead Amateur Radio Club History Project

LARC

i'lforra<lt~io;, regarc'i:,::; CLlcLli?;eS is the l~adio regu1atio'"1s afeecti'l':; the

1. Ccna<licn. A~_lateurs :~ave lost (20 - l30 Uh2, while r'etai-li1g(30 - 4SQ. Ale~:J bend has bee, picked up 01 902 - 928 mhz. A3 & F3.

B~letio1 of log keepi1~ requirerneltG for ~obi1e'oper&tio~.

3. llerhpasi ig of Frovi;:3io'~s deali~2: \vi th fr3C~Ue''1cy measuri'"1g devices.

4. Deletio~ of certai~ requirements deali~g with portable operatio~

and with mobile opera.-tio'J.

5. Permit the use of A3 operatio~ of 7050 - 7100 khz.

6. Permit holder of aoateur class to operate ofter 6 mo~th usi~g Fibete,vee:. 3,5 & 28.1 8::ld A3 emissio:'.'1 in. 1.8 riliz to 2. rahz

SIX r'lET£:.:;' BEAC<)tr 'ria nORTOrillCS

VE3-:::DL sig1ed 0:'1 in mlbd December as a 'lew Ca:tsdia-"l 6 meter beacO'1. Ittransraits 21;, hours a day 0'1 50.077 mhz using 10 watts C~'l into aCushcraft Sc~ualo O'lmic.irectioClal horizo:'ltally polarized a:.te':1.:'J.a at 130ft.So far reports have bee) received from all parts of North America.Its Cll is ••••• VE3-~DL VE3-:.>.DL VE3-RDL BEACOU TUWfTTO QSL TO VE3--"/L Ail.This is se~t at 13 wpm with a 5 sec pause i~ tra:'J.suissio~s. ~ith thesu~s~ot activity the wasy it is 6 meterc is a good bet. Try it.

rcSSIBLE CU'TA OP2~tATIOn

ZLI-ADI and ZLI-AMO hope to operate from Chi,e Projected dates arelate February or early March. Give a listen for them. (RR Report)

GOIHS •••• ,~C'I~TG ••• Al1D ALf.1CST GonSStill left fro~ original batch of 12 •••• one only EICO Model 460oscilloscope, DC to ";,.5 r.U:1Z with 5 i ':1ch CRT, each u':li t checked outoperational, calibrated wit~ service data operati~g instructio~s a~d

cables. Price is $75.00 plus $5.25 for OST. Call nave Kimpton at hone344-8949 or school 266-0661.

EXAM TIMETh~ n~xt scheduled DOffi Examination for prospective hams or thosewlshlng to upgra~e, will be on April 16. You are required to phone inand make an appolntment for these examinations. The next one willprobably not be scheduled until July.

DX ANYONE?If you are an avid DX fiend~ you might like to get this new publication.

IT is HQRZ DXV1~ a new weekly DX new sheet that is edited by K5FUV.Subscriptions are $7 (u.S.) per quarter. Write to Box 494, Howe,Texas. 75059.


LARC

BASIC

MARCH HI - Q

DIGITAL

Due to business committments for this month this article willbe somewhat shorter than planned, hoWever next month. we should be

'back to a regular schedale. .

* * * * * * .* *......

* *,'.;."

T.T.L. or Transistor - Transistor Logic,ascici~~{6~ed last monthis probably the most common of digital circuit ·families.Within this family there are many types and classifications,depending upon speed of operation, power requirements, etc. b~~.

first a few definitions.'

FAN - IN: TTL gates have to have their inputs pulled LOW tofunction. A standard input is one requiring the driving, device tosink 1.6 rnA to result in a LOW input. This standard input isreferred to as having a FAN-IN o'f 1.A FAN-IN of 2 would indicate that the driving device would berequired to sink 3.2 rnA to, pUll the input low.In TTL circuitry then we could say that FAN-IN is the numberassigned to the device to indicate the amount of current the drivingdevice is required to sink ( x's 1.6 rnA ).

FAN - OUT: 'The driving capability of an I.C. This number representsthe number of standard inputs ( loads ) which may be connected to thedevice. For TTL logic a typical FAN-OUT would be 10.An I.C. owith a fan - out of 10 would be able then to sink 10standard input I.C.'s, each wttl1,a fan - in of 1 for a total loadof 16mA. Only 5 ie's each with ~.fan-in of 2 could be driven by thisdevice. . ....

c '" ,.

indicates commercial temp. range ( oOC - 70 0 C )'f military temp. range ( - 550 C - + 1250 C)

The FAN":'IN/ FAN-OUT values are 'normally listed in the manufacturershandbooks, for example the National Semiconductor TTL DATA Bookindicates that a series DM 54/74 IC will be capable of driving 10DM54/74 serie's ICs or 40 DM54L/74L series'ICs.The 54L/74L series mentioned above are one type of IC within the TTLfamily. These device are LOW POWER types and as you can see by theFAN-In number, about 4 times more of these devices may be connectedto the standard IC as they reqUire approx. *the current.Power supply reqUirements would also be reduced using this type,however the low power devices are usually slower in operationthan the standard type which could limit their use.

The standard TTL device operates to approx. 35 mHz for a flip - flopThis' speed may be to slow for many instruments so a HIGH SPEEDdevice has been designed. This high speed IC will operate atleaJt twice the speed of a standard unit. The high speed device willdraw more power therefore limiting the number which may be connectedto the standard IC. A DM54/74 would be capable of driving 8 DM54H/74H series ICs.

The SCHOTTKY and LOW POWER SCHOTTKY TTL devices are designed toimprove speed and power dissipation over the standard TTL IC.SUMMARY

74 .•.•••.•.•54 •••..••..•

'.,


LARC

MARCH HI - Q

54Si74S •••••••••••••• • • • • • • • • • • • •

BASIC DIGITAL cont'd

no letter i.e. 54/74 indicates standard speed54L/74L • • • • • • • • • • •• low power serie.s C.one t.en th to t standard pwr.)54LS/74LS ••••••••••• low p~v-~':"Sch~'ttky(' abou t one fifth pwr, same speed

high speedhigh speed schottky

54H/74H

I.C. Identification.

I.C. 's can be identified by various methods such as power supply.:requirements, HI and LOW levels, numbering systems etc. .For example, TTL logic series have a voltage supply of + 5 vdc ando vdc for vec and ground. A high. logic level of from 2 to 5 voltsand a low logic level of 0 to 0.8 volts. Other logic families mayalso use similar voltage levels, so be wary of. using ONLY voltagelevels as a source of ~dentification.

TTL series can be readily identified by the part number. Thisnumber represents; manufacturer, temp. range, the sUb-family,typeof gate, and the package~

EXAMPLE: What is a SN74LS02N typ~ IC?

The SN indicates the manufacturer • • • • • • • • Texas Instruments. " ··74" . fl' II II tein.perature commercial 0 to 700 C• • • • • • • •: II .. 54 II II Ii " range military -55 to + 1~5oe• • • • • • •II LS if 11 Low power Schottky • • • • • •II 02 II Ii QUAD (4) input MOR gate.11 N Ii 1I plastic package. ' .a

• • • •

• • • •a 7400

740474H04

standard TTL - - Quad 2 - input NAND gate•.

HEX InverterHEX Inverter High speed.

On most ICs and many other linear type integrated circuits you willfind two sets of .numbers, one sot represents the TYPE of IC asexplained above and the seoond gives the date and week of manufacture~This second number must not be confused with the part number. Itconsists of 4 numbers such as 7438 or 7816 etc. Briefly thesenumbers represent .the year and week of production as follows:

7438 •••• year 1974 and the 38 th week

7816 •••• year 1978 and the 16 th week.

PACKAGING.

The most· common package is the plastic DIP or Dual In line Package.l''1ost commonly come with 8,14,16,18,20,22,24128, and 40 pins. Thepin number 1 is normally identified by a notch, a dimple or similarmarking. Pins are n umbered"in a clockwise direction lookingfrom the ·TOP. .


LARC

· ......:.

HARCH HI - Q

BASIC DIGITAL cont'd

The NAND gate

SYMBOL TRUTH TABLE

AY

y A B y

L L H

L H H

H L H-

H H L,

Nfu'\JD GATE

The OR GATE

~=t>- YC D Y

L I L L:-...-..4,.',

L H H

H L H-H H H

When C OR D are high the output Y will be high.

THE NOR gate

SYMBOL TRUTH TABLE.

A B Y

L L H

L H L

H L L

H H L

* * * * * * * * * * *


LARC

'!be> i'Q.ll(')';riin~ ---n£,o-ml'rti<l'" -l.., R'Vl-:r-"'';'~J . ...,~ .J1-O b7 Loo ~AJ.. •

The source of this inform2tion comes from the applicati~ ~r

th~_e special HVX" Award and also from Bob VE3-JAY dupe sheet'.·

At the time of thiE writing (February20) 928 applications have

been processed by the awards chaiman. The brcakc.own is as fol10\l"s:

770 - U.S.A. 88- CanCldian 67 DX 35" SWL

Certificate #1 was issued to KP4-DQP~ Benjamin Colucci. He worked

Bob VX3-JAY~ Les VX3-JAJ, and Sharon VX3-JAV~ and was the first

to apply for the special award.

The VX ce,ll was used approxim2tely 40~189 times. but this figure

is not final at this time. Those local hams vrho have not yet

supplied information can give it to Les VE3-JAJ 20 "'Te can cQm~ up

with the total final figures.

.. "

The VX call showed up on applications 4~945 times up to certificate

#901. One p~rson worked and recorded on his application'16

VX 9tations•. Orie person worked all 5 VX3 stations in 8 minutes.

One Americal said that he tried to get through the pile-ups for

3 hours before finally getting through for his final #5 contact.

117

90

42

37

31

certifice.tes#6#7

ll8#9

#¢

AREA

2reas artd certificates sBnt:call

ii

I

The certificate has been sent to 26 countries. They are Canada 9 "

USA 9 Australia~ Mexico~ England 9 El Salvador~ Panama 9 Ireland~

Netherlands~ Puerto Ric0 9 Republic of South Africa~ Yugoslavia~

Sweden 9 France~ New Zealand~ Dominican Republic~ Cbile 9 Brazi1 9

WGst Germany~ Netherland Antilles~ Coole Islands~ Barbados~ Hungary 9

Argentina 9 Nigeria and Korea.

Following is a breakdown of USA

AREA # 1 certificates 52

# 2 . ".__ . 35

# 3 -~4

# 4 213

# 5 129


LARC

MARCH HI-Q

THEVlVX'~ AUARD •••• continued

Following aVE1VE2VE3-VE4-VE5-

breakdo~m of Canadian call areas:12 certificates I VE6-

2 VE7-43 VE8-

2 V01-

7 certificates20

1

1

By my (VE3-JAJ) count from HI-Q roster i there are 129 Amateurs insidethe city of Thunder Bay. Of this total 58 amateurs were noted as usingthe special r:vxn prefix~ or 44.9%.

Following is a list of use of the prefix by local amateurs:

STATION CALL - NAlVIE - TIMES "VXn CALL USED - ON CERTIFICATE %OF CONTACTS EVENTUALLY ON CERTIFICATE

ARNAXLAYZBCDCIDBIDGZDJDDPECOECVEDCEm!

EDZEEGEE~"J

EFAEFCEFVEFZEULFVlHFS

B.... ll...PhillLesLauriJimHaroldJ.C.HermanSteveJohnVicJimHughRayJimTomJohnBillVlolfKenCharlieBob/TomPat

102012

700

6010

1506500

12

101

35003

100560200

250500

3500

623

12

1

1

1

351

337

75148

8

1

1

3573

49146

72167

7261

--%30/0

60%8;(

5%

55%701050/0

21066/010%

100~1a

10'%

100%49%26/036%67%

1%

7%

HJS GaryHTM John,HZW Mike.IDJ BobJAA ArnoldJAB BobJ AF (VE )-G,q.ryJAH JimJAJ LesJAQ DennisJAR VicJAU GlenJAV SharomJAW DianneJAY BobKRD JimKRF J:-mKRH SteveKRI DebbiKRJ RonKRL BobKRN StanKRO Dan

72050

3502000

501619

250125025003600

550225

504865200100100

193800750125

20

2642379

46723

263

81

305147

35925

10631

55992

19

715

153

335

36%46%22%

23%

46'102%

32jb

24'106%

10'105%

47/0t:.2'1,0_,0

12/05%2'10

19%4%210

20%

26'102510


LARC -CROSS-COUNTRYSKI TOUR

The Cross Country Ski Tour went off as scheduled on Sat~rday

morning, March 1 at Sibley Penninsula. The tour was 50 km inlength with the option to drop out at the 20 and 30 km mark.

More than 500 skiers braved the m~nus 25 degree weather along

with eight members of the LARC who wer~ called on to provide

communications for the event.

Between the start and finish were three check points in the bush.

#1 Manned by Dennis VE3-JAQ and Stan VE3-KRN. Did you two ever

get out?????

#2 ManBed by Ron VE3-KRJ and Ed VE3-KRP.

#3 Manned by Les VE3-JAJ and Bob VE3-KRL.

Tom VE3-EEW and Gary VE3-HHS monitored the three checkpoints from

the main Pass Lake Road and assisted at the start and finish.

Thenks also to John VE3-HTM and Bob VE3-JAY who helped by monitoring

from their home base stationE. Special vote of thanks to Vlad

VE3-KRV who 9manufactured9 3 ground plane antannas and patch

cords for the event.

Just shovs what teamwork will do. Great co-operation from all involved

and our part of the operation went off without a single foul-up.

Many thanks to all.

• •• g ••• g. 73 Bob VE3-KRLevent co-opdinator


LARC

HARCH HI_Q

NEtVS FROt,! ~'HE N()R1~ - NOR'I'H VI EST < Kenora)

Once again th~s year the La~e of the Woods Amateur radio ~lllb

assisted the. Kenora Rotary Club in their annual Snowarama, byproviding two - way radio communications via two meters and the

.Kenora repeater.

Some 50 snowmachines and riders raised approx. $8,000 for.. the .:"'crippled childrens society, dovm from 75 riders and $10,000 in

1979. .:

The snowmobile course ran from the Jaffrey Hellick communityclub hall to Silver Lake, approxi mately80 km N.E. of Kenora.

This year each rider wasgiven a number for identificationpurposes and as he checked through each checkpoint the numberwas passed on to the control station. This procedure kept trackof aach individual and was a lesson learned from the 1979 ev~nt~. ..-

The base station, manned by Woody - JJA, Don -JJL, Andrew - JJxwas the heart. of theoperation. .

Portab~e stations were set up at the various check points withWalt - WD and' Roger - BZR at Beauty Bay Resort. Roy -LE,Bart - JJK, and Phil - JJF set up shop; at Silver Lake.Dale - EFY once again this year was the 2 - meter mobile, on a snowmachine, complete with 5/8 wave whip and set up back in the bush.

All stations reported excellent reception through the repeatereven with Walt - WDand his plumbers.. nightmare, made from tit pipeand a measuring tape .for· the radials.The.only problem was one broken leg and wrecked machine when onefellow got his ice cubes and gasoline mixed HI. As the saying goes. II a good tl.me was had by all"

Thanks to Dale for the info

* * * * * * '* * * * * * * * * * * '.* -;l-

Although the Kenora repeater worked flawlessly throughout the~bove event, rumor has it that the beast will not be in usefor much longer in the Kenora ~rea~

The long awaited approval from theWintariopeople has finallyarrived and a new solid state ~ep~ater should be in service inKenora sometime this summer. The GE rig will operate on a frequencyset of 146.43mHz input - 147.03mHz output, so those of youtravelling through that way check your rigs for the new fr~quency

capability.The reason for the change from 146.46/147.06 is to permit theKenora operators to work into Winnipeg during Skip conditions on thisfrequency set.

CongratUlations fellows on a job well done.

* * ***~ * * '**'* ~ ~** * *Woddy -JJA made a trip to Montana this past month to do someskiing. Laid his G5RV antenna in the snow bank and was getting 59reports from the fellows back in Kenora. So hows the rig Woody?


LARC

Hither and Thither .•.• ';'f' .-_.:.~

Scuttlebutt has it that J.C. is leading poor unfortunate souls tethei~demise and closer to receiving the Fickle Finger. VEJDBI succumbed and is now the proud recepient of that i~o~iniousaward.For a whole year Harold will proudly (?) display (or hide) thatbeautiful piece of sculpture. Incidentally, Mr. Dow is quite activeon 28 111hz where 11e tests his power supply and ·tons ils by operating10ck-to-talk2

VE3EEW is still strug~ling with the 40-meter yagi and true to ~mat

eur traditioU', Tom doesrnost of his antenna work in the winter months.

Not to be outdone, VEJXJ went one further and put in a set of caax,heliax and rotor cable underground in January. Not only that, butmoved. the 2-meter G.P. from the tower to lfIhe pole and installed amast on the tower in readiness for a ten meter erection ef massiveproportions.

VEJBCD~ln ad.diDion to all his other activities is now tGlying witha TRS-80 Think-tank. Also gets on. the H~F. (SSB) occasionally andis on the pther end of Thunder Bay 9 s only Ham D.H.F. system. Lauriehas the' land-line half· of tl-je Auto-patch while the R.F •. originatesat XJos.

VE3ARN is basking in. sunny Arizona !lnd shows on ten meters once inawhile if the golf course if crowded.

VEJEDZ is in the midst of the most ambitious do-it-yourself prCDjeetsince the repeater started. Ray is constructing an all-band, all solidst~te, digital re!ldout, chrome-plated, sooper-dooper X-ceiver. Theassembly is porgressing very nicely with ~ost of the P.C. boardsassebled and some circuit testing already completed.

VE3KRM out Murillo way is !lctive on the lower frequencies. Martinis literally giving awqy his Heathkit combo (IOC-60, VFO and Commanche Ex). If anyone is . interested in this station, give hi]'!l acall at 935-2677.

VE3JAB is about to e~bark on a new exciting career. VE3KRY is looking 8.round for a paddle for his A:cc::u-keyer. fuve j.s getting fatigued by those back-to-back keys. OM Vic, VE3ECV recently tanned hisdo~e in sunny Florida. VE3JAR figures the only way around Hydroline-noise is to go above those darn lines. Next stop - the clouds.VE3AXL;.is sharpening his saws and straigl-jtening old nails, TrJakingready for' do-it-yourself carpentry-this SUI'1I!lBr - and next - andnext. VE3KRJ denies he is the cause of the TVI around the corner atthe Bels. Must be that CBer down the street. VE3JAY ts going tobuild a wall, ten feet l-jigh topped with barbed wire, lay in enoughgrub for q year, load the scqtter gun and get ready for a long seigeas Bob operates the contests in spite of his friendly neighbours.VE3HFS is still decoratin~ the shack and finding the problems ofhome-ownership. VE3DP recently acquired a Yaesu FT-901DM and poundsbrass on 40 and 20. VE3KRO is wondering about the follies of homebrew (solid-state variety). VE3JAJ is making notes on the side.VE3JAQ recently did a great job giving a sl-jort talk to the Search &Rescue people on theClubQs capabilities. Seems str'3.nge, but the firstthing a person wants to do when gets a micro-processor is. operategood oldCW. l.vonder wh'lt9 s wrong with ~old w!'>,y?Lakehead Amateur Radio Club History Project

LARC

COURTESY OF 10 - 10 International Net Inc.

Wihtcr Dulleti.n Vol. 18, No.1FIVE ELT:jv'E:NT TlET/t'A LOOP FOR TEN

y: Arthur Cit/en - W0\/~13

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ANT DIH #1 DIR #27' 2 If _-->~''- 5.' 0" -';"$-- 7' 0 II -~r.,- ? '__• •• R • ~__.~ _

2" o.d. IlLUIHNUM BOOi;!

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213.0 28.2 ~~[).1 ~~U.G ~n,H 2~j.O 20.~~ i~~)'1

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1 " X 12" 1 i . 11\ um num a 110;. 0

attnchod to 2" beam ulth1 7 j8 H nufflcr cJ.~lmp;

Au tOr.1oti ve typo


LARC

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It'.y 5 element delta loop is 55' from thc gro\Jnd to the boom arrlnumerous compRrl:3ons, 1nsisnal 13 tr·en.D.;ht , have been made with anotherAr.;ateur ::Jt .tlon just 6 bloclw [lWHy.\'.fho is u.'J1ng a \'iJ.son M-I06 6 eler:-.I:lnt10 nwtcr monaballder'iut. qO' ..ar1.c:l gGV~.i~\g e.qunll'''cpo 'ts \:;rhen puru1inge.Ci~1;:.::l PO'.:leJI'. 'The V/iJson M·-J06 has a 13 DB gain according to thespec.:ificQ.tion sheet. It is not clear as to hether it is dbl'or dbd.

This p8.rtj.c:ular 5 element delta loop is mounted on a 2" o.d. X27' lon.e; 8.1uminutYl boom by means of 1" x -12 11 alUr:1inum v.ngle stock,1 7/S[I automotive type muffler clamps and sta.inless steel adjustablehose clumps. The arms are the end tips fron; a cor.:r.lcpcially m3deIG ele!l;f~llt lo~ periodic that was damaged and I was able to salva[,j mostof the elements. Note th:J.t the elements} u:Jod in th1s ar.tenna aregradu8.tsd frOb; .:j/Sli od tG 3/4.. fi ad. t:his L8 to give l1jH.xlrnum strengthwith minimum wind load.

The c ross Vii re tha t j 01 ns the ti ps of the a rms is 'f118 copperwe Idwith soldering lugs at each end of the wire and joined to the tips ofthe arms by means of short pieces of 18 gauGe soft 8olur:1inum b0nt toform a U share 1:lround the arm tips and secured with a 10-32 bolt, nutand lock washer. l~gain the small size wiro is uSt~d to present a loy:wind load.

The nuffler clLimJi~~ that I vms able to obtain locally are not ofthe plated ty~~e. I sUGgest Ll libcrr:d application of alUI~Jir~um sprayt:{J-'c paint on th03e before a::;scmbly and agnin nfter all adju8ting andtif!ht~ling is completed. A better and more professional method \';'ouldbe to U30 con'j[;lCrcially madc cHstingn such as mG.nufacturcd by Kirkelectronics.

The boom to nJ.<tst assembly, thnt I used, is the one most cOJ:-lt1lonly:TID. e by lIY-GJIlN and i.s rr:ollnted immcdilttel.v in front of thc firstdirect.or. J,t tlJi~l point '1J.30 is 1':l:Jtuncd n l'~" x Zl6" D.lum~num up-ri!,htth'lt rJUpports the !!lultl COlluucter [!.uy V/lrt~ th:lt extend~J to approximately6' fro!n each end of the Doom Hila secured with sl~lnl1 cable cla:nps.andHdjusted w1th j\l::;t eno'dc;ll tension to tuke the :Jag out of the UOOr.1.

Ai't; tm r Chl'~ n, Wy5W FH10;)~) !3o h~.~ S t r i~ c t;

Sioux c~ty, Iowa .GII09 J/


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