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The wireless weekly : the hundred per cent Australian radio journal

Page 1nla.obj-632034507National Library of Australia

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'l'h11rsd11y, ...\pril lith, 1!!:.!-t WIRELESS WEEKLY

I ---· --------·-! UNITED...... Transformers I I

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T ype A · ( UNITED

Ratio 5 to I T Jpe A-2 UNITED

Ratio 3 : to I

Let Us Once and for All Times Settle This Question of Audio Amplification

Trunsforn1en;. in t•rrtrr to }.!il"e 1,er.fect audio nmplificalivn ,uust h,n·p " !:har adrristh· rur ve as near tn :1 "t rniuht line ns possible.

United Audio Trans formers have just suf'!.1 ·, ,•un-t• a~ ~•:ru hl' seen from the above chart.

\ perie,·t 'lUtlio tru u~fo rmPr nt:'<.·e:s.sif:1tt1s f lte h••...,t uf c•UrP :111,l wiudiu~ de"ll,!,!ll :ulil l'Oll'ltr111• t iou In the United tbe best of core iron is used, a proper air gap is another reason for their perfect performance, and the winding construction and impedance further combine to make it the absolute best.

The Good United Transformers have solved both questions 1n an admirable manner.

l.11,1, lmt r e:uly f i rst, a perfel't. audio tr:m,formc.r niu,1 give perfed practie.il results.

Recently. Unitod Audio Transformers ca me out FIRST in tests conducted by the University of California-conclusive proof tha t United Is supreme.

Ask your dealers to show you these transformers, and other United efficient Radio parts. Variable Oonsensers, plain and vernier.

The win<ling rnt io nnd shielding pre• s1,nl olher il eni. neeessnry 1o n per fect Try them a.nd convince yours&!!. Re-l ra nsfor ruer. suits speak louder than advertisements.

Try a United Radio Frequency Transformer. Now on the market EVERY RADIO DEALER SELLS U NITED

United Distributing Coys. (N.S. WJ L1d. (WHOL ESALE ONLYJ

Manufacturer of Radiovox Sets 28 CLARENCE ST., SYDNEY and at 592 BOURKE ST., MELBOURNE

. ..

~~·--------------------------- ----=··---------



WEEKLY AJoum(I/ /'Jn'olt>i,folhe lnfertesf.s

of' Wireless &ihtt,1,sias.t.s bp h, "A11te1teu r anaPrOt'l!ssumal

orn• AL ORCA!'i

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THE EXPERIMENTERS.

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:? WIRELESS WEEKLY Th11 1·~cla.1. April l,11t, 111~-t

The Broadcasting Con(erence .

Im hued \\llh the ~pir ir ur ..:l'niet.' tu 1hr µulilic. nnd enli~hteneJ l11 t!oe <·on•.eq11ence-,,; oi Llw 1111.!olUkt"S mo.Je at lhr• ('IJJ1fon·rw1• in l\[dbo11rtw Ju:,11 ,f'ar. reprf'i-,entol1\·,~~ of tl1r broadca~tin~ rmn11uuie-., Jnd th~ puhlir of i\.-..., \\ ., \°ktur ia. Qut·•~u!,buHl. ""intllh \u--1rnli:1 an,! We,t \u,trnliu, 111•1 ,u th,, G.l'.O., '\J.n.-,. ,111 \pril Hth rlu-•i, rni-..,iun ,~,, ... tu an omvli ... h 1\\11 thin~-: I It Tn dit-,•u-. ... wn)-. J.ntl mrar1'- u( Jb11li~hir1g 5~olrd r1·L'c•.i\:C'f-; (2) lo drn~, up and .,ulmtJL tu lllf• Po~tmo..::tt•r--Ci.:nt·ral o.1

\'f1rkulih .. ~ ... d,,·me ~ht'rel,l hron<k.a--t· ing n,ulcl he f'DITiPtl nu ju Aw,tralia "ith a ..,,'!Jtt·m of op~u rP.,·P-ivrr.;i and :rn .1:-:-111r.11wt th;H an ndr-qmllt· finunrinl rl'lurn ~"1uhl h1• «,hluirwd fl\- thi,:-1• r1rmpamr-" d1.,•..;,1rintr. llJ lm1a,ica'.'o-L

Uwiu;.! 1Ji,, hr .. l cln) • ... h1J .. ino ... ~, dw f1.1lh,v. in~ dc·IP,rnlt'.~ \H'rt' ptl~r111 un• ,lt·r thr t hairman ... laip nf \l;1jor !\Jarr, \I fl.IL au.J ,-;1h \It H. I'. Brij,,n. 'r-r-rt·l.Jr\ nr 111, .. P11 ... tal. I ~1P£!:Hll1h mul f ... ,,..,,Jtou,-- n1-pl ~ rrptl"·t'UI int! th .. I' \IJ •. , II '\1,rUlan l'upr ,11J :-. f::. \\ ii-un I l.1rnwr ,m,1 Ct> .. Litt I, 11. \ . 1'11up,•f I"· ~\u .. l1ali.1 H.Hliu ,\ .. -.ut ., • J rltum-.un t \'\~,. .. , A1htrn1iun far11w1••: ( H·op,. Lt1l). \Yith nJ111m \\-ll"" u--.-.m·1 .3lt<cl \\ . E. Coxi1n .a.ci h'C]u11t..1I a,h·i-.,•r, It. \\ ilkc, ! \\ ,·,t Au-tTnlwn llarli" A,"'4•1·1il11mP. [, P. n. Bran (Qu1..·t•11-land Radin h"'1c1at11,111. J D,•rliam C Vidori:m HoOin A'-""i(1cirui1111 l ~ P far T()ll 1Yic-1Hn.a11 ltadio h..;,1wia11onl, \ , 1. Brnwn I \ .... nriftt,·d Ra,lin l.1, .. 1.tt.1.1. E. J I· a.11,-1 , \.S, \\. A~-<•eial1,011 t·c.•r O,AH•lnJtUlt"fll ni \Y1rrJ,, .. ..,.1. "\Y. J. ,1 • ..iunlv l [hnud,u,h•r•. s,,1,,,.) IJJ ,. \\ ll. 'rnll ,,ml f ll. flu1l.,IJ1h t 'i. ""\'\: \...;,,,wia1i1111 f111 Il1·\1·lup11w111 r\f \\'irel...,,1 .

011 IIH' .::,•l·uml ,la, ~;f 1he ,·unfer• t·ni c \11. IL F_ C:ar,inn r1•rla,·,·d 'f1. \ T. nro\\Jt J':; niµr,)"'l•nlati\t• 11r A-..

ooci•tt·,I lfodi11 C:r,., T.td. oml \I,_ E. ll11llriwn, re1,lac,·d 1\lr. I'. t.arroll us H'JJJ••:-.1• nl:tlt\"1· nf tli, .. , 1r1nrirtn Radio As..;orialinn. Tht \li!l.-.,H'lftd C:ompan>·~ 11f .-\dcl,Ji1lt• \Ht .. nnl ut an) tuue re• ,,rP--rnted.

Tit,~ d1airmlll1 rf"'aJ nut ,1 it'ltf"T ::-i~rned h, \IP!-1"'-R. AuLhon) Hortl,·rn ... Ltd,, 'lrw <:,--teru l r•l~pl111ne, 1'1). Ltd. Mutl'u, Clark L1J., \J.,rl- Fm·- L1<I .. UaninJtton.s Ltd.. Ila, i,l .lnrw, T.t,I., antl Lii~'-f'ltPr·~ Ltd.. djsa:.-soriatin~ 1hf"m,f•IYf''-- fr,,m an, hu1 di,· pri1wi11l,· of ,1111• Iii~ l1rnadrasti11p ~tntion.

.... ,,,,,,, .... , ......... 0, ............ , ........... .

In opf-'11in~ the bu,:,;,inc-..s~ )lr T>. ..:;,-nu I prt·"'-iJ1·n1 A--... ,wieLion r111 Ol·· n•luµmr11t uf Wirch--.-..J "4°trt'""t•d tLP fut·t th:.t the oL_it.•t.·t 111 he kt:l}l con:-.picuoullh in vit·\., h} dw dt>lo~ete.~ YdJ!"I the- uJtimalt• l,en~fit thol cuulJ i.P

dt:rncd from IJri,adcastin~ Ly tlu~ p ublir of Au1-1ralrn. a.nu µointerl out that 1f t•.tT) 1lplp,_ga.1t• \\af fuli) .J1\ot' :1• the p,, ....... iidlitir-·'-- ol IHut1deu .. Ling, then the 11~ .. ull of dk 1 111tft>renr~ must lie 11<.·ce,~Jul. They "<'re gutlwrt:<l, ,,,i,1 \Ir. .~n•lt, a=,. h·pre~t."nlati,t"& of the publit: "t·Uatr. "'·ig.l111~tl \,i1h lwa.,} lt'l'tpon• ..-jf,,jJi1ie..:. ,.,hidL 11 wa ... Litt• ,luty 111 t.•\ 1·n d1•lt•gal~ 10 n,n..,itl,·1 f111 t·mH-..t Tlir 1liffi1•11hi.,.. 1i,a1 loud r'-••t~,I in 1h,, pa.-..1 tlH" Lillernr;.;;-. 1l1a1 hnd ariH·u lw-1,u•,·11 thl' Lroatlcastiut uiu.•rt> ... t- and tlu• ulher lllf'mlwri, or 1111" i'nmmun.it~. "nul,1 ull l,c swept a\\U) ol all dw d, lr~ulf'-:- hure in rnirnl thut dit..· real ohJet't uf rlu~ u,nfor~nCl' w,:h, 1.he earrn•-.t 1•1J(l11a\uur l o ('n111·iliute. nnd ,\·eld t11J?eth('r th~ ,ari11tb h111li,·s afl't•t·lecl h) l1ro,uh·a~ting, .rnJ. :ill ("11mhine to g:i,,. 1111 1111loli<· th,- J,..,,1 thal ,·,.ul,l i'"'"iLly lit· tttt nUI ui ln'oa,J,-;1,tinf!.

1 ttf• quid,r---1 "'.1' h• apprttJrh 1lum..111n \o,,a .. to dt•firutt-h 11!-r,•rt.iin th,· ,111i1udL· ul 111, ,h•lt•,i,:,1t,~"' uu th,· t1Ut• ... tiurt uf .. ,•alt•d ..... ,~ \f'l"'l-ll ... 11p1 11 ri~,·r-i,·,.,.. .... unJ upun Lhi ... llf"int,.!. 1,ut lu tht· 11tr•r>ting, d1t prr-.r-ul d .. c.·'ar, 11 1lwm,.,1•I ,,-.., dt·fin 1t1 h i11 fo\our ol tl1f' prinC'ipl~ of O}Jf'n h•ff'i\·t•r~. (Jfo\'ldt'd lltt> int1•r• t·-it'-- of rl1t· J,ro::uJ.-.~-.,inz- •·ornp~mic~~ 1,._, ..t1h.•4uu1~I) 1unlr1"1Pd

In r•'pl~ to u leudrng c111r-.1l11n \h. """· E. \\ jJ .. 1111, ,d111 ,lt·rl,Hn·d rh,11 1•,u• 1111-•1 und C11 •• L1d .• lm.d pr11h.1lil) don,· 111,111• for ltr11:1d,·a .. ftn~ than :11t)·o111· ,•l:-1 in \ustn11it1 ,\"t1Uld. n,, m..-tlf~r "liu1 ..dwm1· \\I.I!-- 111 fnn't'" 1!11 lhf'il' ntmn~t 111 11rf1vidt- rltr pnlilif' wilL 1)1,• mu1.i

mnrn pffo·in1n u( hroudt•a ... 1ini,! pn.:.--.il,ll" un<l.1·1 lilt' r~i:=;11ln1i,1n-... llr- hmJ i1 .... (inilt' infurmatinn tlrnt rh1• ... t:ali•tl n•k 4.'t:lH~r wu...-.. ul1!if.lutr-l,· ('ffirit•nt uut.l 1u1 dtrr .,.ra1t.·d tht.1.t whr n I 'an11t•r nn41 Lo .. L1tl. 1 ntt·red intu o c-ontract lht·)- 110

!'t·rH•ri it 1n tlw lt>lter. \Ir. 'Wil1.1m ~:iitl Iha! f drlllt'f'-1 Wl'rl' prPp:lff'd ffl --uhmit J ~lwnw ln th,.. P M.G.. l111t whrn pre'--..l·,I hy \Ir. lie.:an tn d;~lr• --t' tlw 1rntur ... of 1lw -.,•lu.-nu.• i11 -..o far u .. it t•11nl'n1tt:>d tht> 1rnUJit•. ..,tatf",l I hat rht> prh.111- 1111-.111,•..-... intt>r,•--t .. n( 1-J.tmer-. wt·rt'" ..;o du!-f'h alJi,•d lt1 t!i,_, ,;;c_•l.:,~mr 1h::at tliry wt"rP forrrrl tn rt.~-:if'r\t' tht

<letad, lur 1he ear .,f th,· I' ,1.1:, am! lliPn only upon a dt>lmitt. 111,i1nt1,.1u,

i\ nwli1111 hy \1r Bean r,_..n~urmJ! 1Ji.., d.tjuude r,f Fanru•r..- rn rt.'fu,;.lnJ! f~ ,h~ 1'U3.~ 1lwir ~hf'mr al 1hr ( .nnfc..1r11t·c ,,a~ wlthtlrnwn 11111" ;.d1,·r \1,•:t,.--.r~. l'op" .rnd \Yi l-,un 1ltr~ate1wd lo wi1hdr:iw.

Tlw pn,µu:,,.al .. r th~ .\-. .. oriaJion Tor 1he dnt•lopmr-nt of \X'irt"lr .... \\:t.,; 1h..-, rrnd nut i,, \lr. -;roll.

Scheme Devised by lhe A~sociation for the Development

of r.Vireless in Australia, New Zealand and Fiji.

The foJlo'\\ 111i (•on..,rit11h- t111, li,. rlau~,·-- nmluwtJ 111 1hc A ... :-.ot'1Jt nu' .. n·1 un!ilrnc-tht• ,,wlu~mc for hT01Hka~ting. I I ,houlrl lie no1o·d that a uwoh~r of llu· nif->mhns nf 1he asSoc,ution arP de ri11itt•h a~uiu .. t 1hi,s; -.thrme

, I • Th~ public 111 he allmve,I to use oµ~n .:r,t.:; "ith11u1 1:H1~ re..-trwt iu•, wli;Jtc'\t!r.

12) Tl1i~ ig.sut' ul ,1 n1.m..w11n Iii r7ce r, ...11 0"1wr .. 1d radio ft->l ,•iyin~ ~t't m -HI ... f•t'r annum. 1"1lr 1ht~ lmuuk ~, ing s11l,11rnplirHl!--. n.xrlu-.i,,· nf 5 !Jct

annum for the C11°tL~mm,·nt. The l,ruatlt·a:.--t ing sulk-rripl i1,u i.. her,..m• ,,her ,·all•·•l ti,~ revenul'. and shall t,., ,•xdu~h,· .-f :111 ro}·allw~, ii an~.

I.~ 1 Earh licence •hall loe pem1an· ,•nth r"'°hihitt>d in 111•• rnom 111 v.l1id1 tlu· .. t'I j.., u,<,if, A Jtt--'mtlt)' of not lc-'E'~ t1wu £~0 for hou ... -.ing a ..,~t "·id111u1 tbt!' Jin .. nrP.

(..JI Bro,.ulnl.:liJU! lit"t1?H"1•--. t•"' l11• 11f IWO kin,l!'l-. JldUlel;-. "'A0 nt·rnrc.·, the h11lffer, of wl1id1 ~hall t,,. ri·munr"rMrrl from lht re-,cnue: un ... Jil"Pnt·•·. \\o}tit Ii

.... hu.11 he i-:1o'-m·J to prr~in:,:. ,J,_.,..i11n,!! 1 , hrn;.uka-.1 ·,, itliom rt-'mtmt~rntwn fr11Ui I h1• fl•\ en UC'.

t ,i:;, 1\1, J)Pr-;nn, rurpnr.111ou nuu Jiany .-1r fir 111, --:f1n1I in :in) 011e ,:'\t.1te h,. 4lir1·,·1h hr imlire-tli}' intPrP,.ft•d 1r1

11wr1· 1ha11 •111r- 1.A•· -.;tatinn hnt,1rlca.5 ltJJ1~m•11tn~ t in·n~1• Tl1i..;, \\ill nut ii, tf"r {HI\ 1·11nrl'rn rmm OJ.)t"TTlt fn,:. in ttlor-e th.cm 011,• 'Int, .. nr ruJ1ninf,! it-- n,,n pro• ~l"dtlllllf' \\ it liin tl1c Stntt• f .\ ltro.,d ou• line•. 1\umbf'r of ''A" rlm~i:, bro1,, rai,tiu.µ- lir1•11-f"~ In IH1 fimjti•c.1 tn tltrt"C in ~-~.\\ three in Yieroria. t,.,1, in l)wTn~fmul. lvm i11 '-;outh .Au .. trnli.i m,l 1,.,,·n in W,·:.-t1•m AmHralia.



WIRELES:::, WEEKLY

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WIRELESS WEEKLY

twn :-.I.Jt1nn'--. To rhe nominated sle-lfnn. l"1'.o•tl1inl.. 11f 1hr rr•,,,~nne, the 11·11rni1 ,lt~r 10 1h11 otlwr '-lal ioJL \\ ~wt•· tlll'Ji art• Liln:i..· hrnatl• (''.J"-lmf! .. f;,tiPTI!-. ~ti (H'1 t'""f"lll- .. r th ... J1•\1·rt1Jt• ..;hall L~ ;1ppnr l 1L11wd to rhe 11,1n11n:1trd ~talion. ,ln1l 21 pl't c1•t1 1 ,·.J, h ro li11 11tlu.·r~. Dural~ ,l 1,:.,•nrral d 1-.1•u-.. .. 1n11, \Ir Th11m.,nn r,,i ... ,·,1 1h1 primnn 1111,-... 1irin 11! t11,,\ T4:·

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t·,illt'rting f t '\t"IHh.! fron, jlrfl\"l .. 1111 r .t

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that 1l1t .,.wtu,11 ~lppar~Hu" u ... , t'i in hntlr ~ta,inn'"' \\t•tt• 111w ar11l Lill' -,1.IJ:11• \I.a!\ p nr,· 1~ ll IU Hli·r .1t" 1-1·u1Jolll\

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("mifinued ,m 11t111•' r,

Cash Bargains for Experimenters

\\ L>. 11 \ uh,·,. I.I ,uh, .25 Jnrr. 37 6: \luUanl "Orn:· 20 -: WccMelve;, f.J ,oil, .25 ump .. 37 6; ~ \lullunl 5',cke~, 2 . ; 199 or 299 i.:11rkt"1~. -t. ; Po1enti11metcrs, 12 6 an\1 14/6: Radii'I Frt-41ue11ry Tran1.. § § lnrm,'rs, 200-600 m -ire-. 30 •: 200-5000, ,15 -: Audio Frn,1ucncy Trnn•fnnnn,. 3(1 -; r II. Batter) ~ I '";,el,~~•~:•:o~•;.,,~~:~~::~~'.'.' COMPANY i I -, .. '.' ~~:;:? ::::~:~~.~r~;·:~3~~..... I ~lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllli'lllllllllllllllllllllllillillllllllllllllllllllllll/lllllllllllllllllllllllllllllllnlllllllllllllllllllllllllli



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Gilfillan USE

Radio P arts Highest in Quality E conomical in 'Price

Welby Radio Company 13 Royal Ar,ade. Sydne)

1,1,plion, MJ4;

FlLA.'l:ENT I



6

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E"·rn ,,,,w, •1111•1111·r ~\ 11111 l\f• H.'

quirri l tu kf'rp u lug. ~mtl ... u.l,mit it t11 Lht• lhttl i i• ln --1,e1't1•r , •,rry t..i \ 1w1nth"-. :\I r. F ,1li,•~ --ra ti~tl thnt 1,, .... liud <·11mmuni('at1·d \d1l1 '\11 . l'J1; l Ren'-'lln\\. thr m:111 1u \\lh\11! all t''.([u.•rimt•J\111r- Wt'fC fn,)k• llli;!, anM 1'1:u cc-IH lem3•1 Ind Pxprl'.:.,_t•fl him-.clf R!:- hr1n;! t-nli1t·h i11 a,.-rurd ,, il '1 th,.., propo..,itin11 \lr · Fuh~~ ,Ht! not makt• ir ,~ 't'u ,. h..iht:• ~l r B,-•,1-..ha,._. ,,a~ f'\llTf'~--i n l,!" Ji:_ n ,\n prfn1t,• oIJinion ur thal t•f 11w ,•,11rrim•·111,•:--.. I\l r. K;m1wr ...:t..:tt~~J 1ha1 1b• C'unf,-.n•11L't" had nulldn" ur all 111 d,, ,,,:1h tk'-pPri111CHl·

WIRELESS WEEKLY

,•r~. 1111,I '".a-- purPI) n Rruatl••.a.,.:t in_:t C ,unf PrPncr. \Ir. ,~, ilkt""9. (lropo:,;..-<j that u.11 ill'Plicanl- frn e,pc·rl.Jo.,-ntnl liu'll· ~t ... hr ('°X,)U1111ed II)' thf" Radio ln-:,1wc·• lur nr a:--- an o ltt-'rnutn <' c1 hoard com• pri-.,~41 nf r,•pr,• ... 1·11 tJli,,· ... 11r t lw f ' \I C: llr~part11w111, Un1adrn--ting Cr11npUu} nml u luuh n~prr'-•'nLint 1h1 ••xtwd-1111·01,•r-.. \lr. TltuU1...,11n '-a.ii i 1hat in lJj .. 411Jiui1111 •'\l'J\ f'XJ1f"tirn•·n1n w11uld (.,, ~la,l 1n pa~ llw lu,,adl'a--tin~ "'11h• ~nJ~•l111u.

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ror1tJIIUt'd On [l{l(]t' {f

§lllllllllllllllllllllllllllllllllllllllllllllllllflllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllli!; I Our Radio Depa rtment I =~=========:==· 1s now 111 frill sw111g and w..- c.:.; n suprlv y<'u wirb I a full range of .. WIRELESS SUPPLIES." Bcmg

agents for the well known FEDERA!:.. EQUIP.

MENT we are in a position to quote you ·• GOOD

PRICES.'· Send along your Radio Problems, we

are always AT YOUR SERVICE.

Price List on ApplicaMon.

The Home Electric 106a

l' hone n 5563.

Kino· b

Street, Syd nt"y

-

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Tli111·,,l;11, \ pril 1 ii l1, 1'1:!-l WIRELESS WEEKLY

- 1111111 1111111111111 111111Jllllrllll1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 I 11111 IIII I~

! The Colville-Moore Wireless Supplies Ltd. I

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A High Resistanee Head set

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Good Appearn nc0

PRICE 25s. per Set

Guaranteed British Make \\'e11?ht , nlv 10 ,m. 4000 OHMS ReS1~tancc\Vou11d to g11·e maximum number ol turn, proportiuual to remtance Sta!lny D,aphrams, Alum1mmum Head

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Tlus I lilnd Set has a ,pecial adJU51ing nut for alt<'ring I ·e pressure al(atrst the ears. The Handles are of F romri~ and made 10 black, hlu~. red and whlle, 1vh1ch

give, smartne$s to an)' \\'ireles, '-et

PRICE jQ • c11mplete with Cordi.

While th.e slock lasll from

The Colville-Moore Wireless Supplies Ltd. 10 ROWE STREET, SYDNEY

~

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8

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~huulil lw ,tn ,H~e limit. and tlt;,it in lti-. npiniun .1 11lau ,,,,., 10 t·onl•l not J,•at n lht" l\lflr .. t- • 111)1 . ..\ pu. ... ~ut· Lit

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\Ir. II I' RH"'" ll1n, ~tatt·,I tl1at in ,lll'i hro,:1d,-,1,tinf: -• lwm,• !lw P ,1. c:, ,\;,uld pr11kl'I d1,• 1· ~ht, of the ,·,1wrin11·nt,r-.

finafh 'lr 'nifl pH1pt1ii.·d 1h.1t 1b,ma11,, Ii,• l,,fl ou•1 f1ir vrhat,· f11nfi"r• ,·n, ,. 1m,I 1!11• ,lr·lt•!.!.111" ... 1lit•n udjou,w·d 11111il \f,,,11Ja, . \1,1il 11th.

WIRELESS WEEKLY

.\ fo•ture ,,r l~" ConferPOlC~ wa- 1h,· t"').lraunJinurv palienc~ t>xhihitf-rl b~ '''- IL r. nro,,n. ,,ho IDU"-l IJc COil·

j.!,ratultut.'d uµon Jij..., aLilit, tu ~it for !tour:--. <1il~nl JnJ inactiH·. anJ vt>t pm-in~ lht· '-trJctc~t attcnlwn tv Lhe tlcbatcs ol th,· cl,·lt'~Jll'S, rh, """''"rfulli !oo)mpatLf•l1f tllt1t11dt• mt1intn.ined b~ \fuJnr \larr '\\a ... n)!i=:. il markt·d f,·at• ur,· dllJ ,, l1i.:n nm-.1J1·rmµ Llt<· fat l 1ha1 Iii-. :1ltPn1Jam•r al tl1f"' Cnnfor,,.nrr prt-• l lu,lr'.fl liim rrnm !akin&£ PJI I in im1>orl• J.rll 1,11l1Li, fum li••n'- t·1•1m,·, tr1l with 1h..- , ... ii 11( llit-< Fll•1•l; funr1iun\l :11 ,,l1id1, nut anli<'lpatini tlw Hr111rel'l,•4J twturr of t1w l.11nft•r1•Jltt•_ ,1ajor \brr ti,,tl ltHilll!!"t'd t11 ht• prt•sPnt. I h,•n a

~Jll'l:lal \ut, ~,r 1ho.11ks -11111d(I he pa~1;..ed l11 111m (or 1h1• ~pirit wh.id1 promµ1i:d him tn l'311C'f'l all orrangPment.. 1n ru,· 111 11{ th, I )i•\t•lupm+·r1I of Wirt•le--.. in \1i-tr.11iu

,m1E EXPRES--10:'iS or OPIXIOX

Tn tLI" t.ltr,•t· tlt..•lL'~.ilt---. ,,hu )lr•ipn-.,•,1 J hrnJ1ka~1in~ ~rlwmt'. Ll1io1 paper pul a l1•01tlin~ ,111t·'"tion ~l,111~ 1lw fo1lf1winp: linh: ··no )OIi l'llhl(iJ,•r 1ha1 a 1•latbt ...,h,111M lw 111 .. r-rtt-fi in y11ur -,chrme pn,. , itlm~ fur th,· ,,,..,mptit1n of 1•,,-;prri• mt>ntt>T- fr,1m tLP p,1' 111t·ul 11f 111 L•J.dt.·a~tinp. ... uh~, rqH111n"" ? ..

Th11r,ua~·. J,pril 17th. l'.l:!4.

Sot•· 1hc r,•plir..;:

Mr. R. F. Gardner I A,,. ....... ...,f ll.1 tlio C.ompan}', Limited•· •·A" outlint"<I an my prnpo.:-al1 the P:XJlf'Tirncuter-.; ::trf" not to be taxed. 'lo ltrn:.Hit~-t ni! ~t:ht~OJI• t•.1m ht.· t·un~itlnt>tl fair ur e•· 1

-.ihlr un it>'--.!\ 1hi~ pro\:h,.iun 1-.. mad,~ .. .., ~Jr, S (. Cu•o•·k 1<; A Ha.Ji., ( 1•111•

pan~ J • I prt·ft:r not tu ~w .. ,· 1l1e lfllf>.:.tl111i.·

\Ir. \\. U. SN,tl ( prc--i<lu11 uf tit, J\'-!-Ot'iation tor th, [)1•\"(·!11puu-n1 ,.r \\ irf>Jt-*~1'1 '.

14

!:'.,pcakinJ! f,,1 111\!-ot"!I llll(I

for the os~m:1ali11n. I c·nn~1tlrr 1hdl th~ l'\(Jt•ruuL·ntt>r hu'."> tn~t'll th<- 1n1·a11.-.. 1 fnn•t f,1r lht"' :uhant~tnwnt oi w1relt1

in A11 ... 1 rali~. and tluu ht' :-..h1111!.J re i;:i-i\,· 1'\l'r) c:-on:-..idf'ratinn l think th"' lw'-1 ruv.:tn, of tlr1t-rmi111r11:.:. tlw (tt'11U• int' t.•1:p1·1imt·ult'r w1,uJd lu-- Uu- cc.tab li-..hn1t·111 1,r H lh1drtl. ,·ompo-,;,•d nf unr (l"IJI't'"l.;Plllali,t• rn,m 1.,•ad1 of d.1c follu" ing huclics: The l'.\I.G·,. U,•partm•nl. the A~~ocfatiim for tl11• Dn·f'lnpmt nl ,1{

" irdr:.i....i., and a hoch repr,•c,•ntal , tl1t" wholt: of 1ht t•\pc.·rimcnt,·r~.'

Tell yolll· fri,·rnl, about

.. W ireless '\\ ct•lh ··

FOR YOUR

Wireless Receiving Sets ll

Spare Parts and Equipment

Go to SW AJNS SWAlN & CO. LTD.

1 19a and 123 Pitt Street

Call in and listen to Farmers' and Broadcasters' daily Pro rarome

t-:x,•,•llt•ut \fir1.•l(~-.i Bro:-.,h'a,I i11g 1-.; l1c,in~ l'OU

dnut(•d d:1ily ln· l[e-..:--.r~. l' ·ttJUt r~' Ll•I., :mil nroa!I ,•,isl er•', L1,l ..

\\"ith th1.:• remt1,·af ur till· nl• j11 .. 1 ionuhl,• r••gula t ,nus whi,!11 h~l1! 111, tlu• ct:tlt=t ni r1•N•i,·in'.! 'il'U,

t•y1-rrn1w i11 \n"l.tr:1lU.1 will 111• 1·l:.11uom·W~ fur :1 ,(It :I~ ~~IIHI ;t", n11•,,· l'ilH affor11 tt, Jltlr('ha.;;,,_ \\'ht'tlH•r it 1,t> r, {1ry-itnl St1 t, t•u:--tiu~ on1.v a fe,,· pou1111s. or a :4t•I llt\ Luxt.•, t•O"i.liug !lfl'.'rlhiug fr11111 £71j to t~;'")I),

110 mu~ 1~ likE'h to he withont one.

'flw onl,v proh 1e111 to owlvP l>t\ing a~ lo lht' type ur -;pt it i~ intt'rnl P,l to pur<·lla~(•-tutU tltat l.:.i 1-\·bL'rP w,• 111:~Jrl· to l.H.' of ussist1w1•1' to you.

\\.t• lnn-t• 01w of tl1e finest "'l'IP1·t in1L'l ,,r l{t=-t!'h

iHg ~l't ... ln H,rrlm•v, n1nnuT!H.'tt11·1'ti li.v th,• ,\111·dg-a m:1tt~d \V:irt'lt'~:! !'11 .• Ltil., tla~ lnite1l T>b.tril1t1l itts,!

C'o .. T.t,t.. a111J by Hriti~l1 l'r•u1p:t11i11~.

.\ lsn \,-,, ha \'e ont• of th· bebi w1.rt•fes:; 1:-xperh iu .\usrralia \\·ho ,;dl\ mukl? :,:011 a s('t to onh•r ,Jt1uwnslrotl- tJ,r seti"\ 1111 hn111l. aud ght> xon all tla nr·•·e~~mrr jufomrntiuu to 1q)t'rul,· nT to lmilil ~·r,ur tH\l1 :ert' with thtl JWJ'ls whil'l1 Wt' sttwk.

w~ und(:r:lkC' tp prcH•11rt• :ill lic•Pnst~~ or 111•r111it~, a11ct \() nin.kt• I ll~ t1t·t•es"':1ry ;1rt':1UJ.rl!lll~l11~ tn t~n:.hlL, ,·on f o Jisteu in to all tU ... wiret<~-"'s pro~1T111,11,,,., ·from ;n1thori~1.•rl ltwal "'!uurt-t. .. s.

The Wireles; Supply Centre-of Sydney - 1s Swains, 119a and 123 Pitt Slreet



Th11rs,I ,,,, .\pril l,!11, l'l:!.l

\\II 1111 \'\ 1r,r, I)'\ I <l\\ \\ I\ L I F'\1, Ill "

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WIRELESS WEEKLY

\\" oh••n lu,,I 11n :!110 mdt•~ \\h .. d 1 .. ,. flf n•tl rlu· ~h11f,, dtin• , ,to i, .. .a.ttnhut,•il lo t!lf •lu,rt ~-\! ..... I ,mt ljol Jll.

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,, .. ,, 11 fn rnal, If \\nr1l1 "lid .. 111 ('OIi•

,lu,1 - ,u,r -1 nll • l\r ,,_,, Ju:; ' " 11tl BOOKS ON WI 1<1!.Ll.SS tnrt.-r .. tr Joiwrr i i ,,,u ¥.1-11 111, lr"!-1-.. unf ,r1u11J.kh. mu~ fw ... ,mr"'lt l r,·-111 lr,I ,. .. l.,r ""' lrt111"'Ut ,t-,u,n in 11ur .11n1.111 ur-. 1-. 1 111·1·t111 1 ,1, ,1ur t,11110 fa~ ,lryr-... 11••1 l'f. 11 11 J=,f'IU'/111 1111Wl t1Jl IH. r·n I'{'' 111 ~, lu-J '" 1 ~• mrt,·1:,, L,1)('11 ,, urn.I 1.1n1 n ut.J) U!lt" 1111\ "11,,.

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IIRlr', 11111 J1Jrnt1 •n of 1111 II 1J.. \\ crl \.in,Jr,.., r1 i:ard I" Ii, n rn

I 1, "" f 11r R ,la, /J111:!tum$ unJ 1/,1<1I, I I • ,11 r f)~al ,llhfl \ udm11 Hrc ,-1, itt~ i..;;d• J'ru--<' •• 1 1 JI•• lr<1l

I /\',r,,,,: lt,t'III' l low fu \fair., r11rr 3 3 I I lt•1l

Rnd~ /'111111 t ",10I ..,,,., If.,_, I(> \f•kf"' l'nrf" l :l 1•ct1-1.-,I

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Ritlt ... r,, '" ,.,., '4m11l1h,·r1 Ht1 I lfllt ttJ " l,t' 1',rm n, J \l .. rJ l'r, ... I 8 1w,1.1,-d

.S.W. Bookstall Cc. Ltd 1 r1h,1lh ,miu. t II "-f'll\11 1 I\\\ Ub -....'"Orff' S1i,-rt {·,,,.

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RADIO PHONES f

I j i u r~ n.f1•- '11p1•riu r ! ~l alo 111 ,1 To n,• i I ll'a•l-,·1 " 1th pol-l nrit"· 111d it-atinµ

,•ortl

I 401-I -=~

Brandes

\_LL ;,m111-.u "l•I LO 1'111>\J, 1

V11 /\"ul.11t/ Cumwr:t/011 . ..,, tlwn/r .. Ft,~/-Ptot>f I 'l·ttJ &n:~lllt t. l]ltt/ C/,..u1 t/.-llu11· Tom.'

nu, nu rm 10-;rT 4,111111 1111111-. 2 5 / • "'l'\c..ll: II \~D l'lllli'lt: 1.01111 18/ 6

~~2 386 GEORGE STREET

Urunr lu•-. 10 .a.lJ ~l1.1~.-..

31 ....... , ........ ,,; .. , ............. " ........ , ... , ... 1,,,,, .. , ......... " .'"'''""UUH•Nllt•IIO!•Uh••'l••"" '""''" '''"''"""""''"'''"''"''""'"·'"''"''j'''"'''"j'l•Hll,01nu•••n••••ltltllllli••rtl



J(I WIRELESS WEEKLY 'l' l, 111·,,l ay . • \pnl 17th. ]!l~-1.

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ILES' WONDERFUL WIRELESS ----•·---·--~--- -~0----.~ -·=·---·-·-·--~ -r

QN Exhibition a t Royal Agricultural Show, 15th to 23rd Inst., Stand No. 74

I i f i I

Desmond Road, opposite Draughts' and i 1 Trotters' I-Iorse Pavilion l . l ' I ~ You will he interested in having ! I d1e latest of the World's Electrical and 1

! , Radio products demonstrated by Experts I -I ~ ; ... _, . _ _ ,-,i_ .. _ _ _ , _ _ ~,,~~ - ,-.,•- ·-~--,_..,._, ______ ,~,

I \V. HARRY WILES i -~=-==;=_===---==_- - - . 60-6 2 GOU LB URN STREET (One D om from Pitt S 1reel)

SYDNEY

Electrical and Radio Engineers

-

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r I r ( \ ,,,•11 l,th, 1'1:!-1 WIRELESS WEEKLY I I

A Crystal Set for 5 /-.. ,,, ............... ,, .... ,,,,[:J, .... , .... , .... , ............ ,.

lh .. ,n-.ul 11,,r

ul r u f I I tl/HJlo1tit,. IN h1J 11rt1dt iu,t u t'I. n J I 11.'i t l',m, f. f n :J.lf J 1 " fod, th ,:111/ md ._r,,/ /,t11. UI i/ir <UC;/ • 11" 11Jm,l\ lhat ti U o lrplo,uM • b111 1• mt, •' I that iii 11161 It I

an I,,, rr l ,ir Juu ,I Jnt J " 1 ,,,f .1houl1 II 1/J "'n



12 WIRELESS WEEKLY

f"'"'"""'""'"'"""'""'"'""'"""'"'""'"'"'"'"""""''""""""""'"'"""""""'"""""""""""'""""'""'"""'""""'"""""''"""""'""""'"'""""""""""i

I Broadcal:c!::eiv;:;m:ets and I

I Together with•••:~~•"'::•:•:••:ERVICE of I l Broadcasters (Sydney) Limited !,:_

may be obtained from the following

L, P. R. Benn & Co. Ltd.

22g L'asUer<'agh 8t , Sydney. 'l'deplton(': Cjty 353.

United Distributing- Coys. (N .S. W.) Ltd. (Wholesalers)

28 Clarence Street, Sydnl'y. 'l'elephoue: City 3566.

W. Harry Wile~ i;o-62 (}i,ulhurn Street Sy<lney.

Telephone C.1y 3688 1 door from P,u S,

Wireless Supplies Ltd.

21 Royal Arcade, Sydney 'l'elepb.ono: M 3378.

E. R. Cullen !J6 nathurst Street

'reJcphoncs: City 869, 2596.

It:i.dio House

lil9 George Street Sydney '1\·ll'phone: City 1487.

Coh1llc Moore Wire.less Supplies

Tcll'p!ionc: B2261.

Ramsay. Sharp & Co. lld. :.l.17 George Street, Sydney.

TPleplwuc: Cily 3176.

The Home Electric

106a Kini!' St rcct, Sydney. Telephone: D 5565.

Swains Ltd.

11 !l-123 Pitt Street, Sydney.

&], .. 11111• 11111,11+ot0111llltlll•1n,,.,,, ... , .. ,, ... , ........ ,., •• ,,, .... , .. ,, ... , .... , 111111111u,01lU•• ..... . ... ...... , u, .. ,11,11ut11111111111•UIIOIOl•11,111111111111111111n111110111111111111111011111111u1tltH{!?



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\ 1rth I I I \ al'r, ll111

I f --.. ,11 1rN (:umhr l 1n.t ... t r,, d n

Croydon Radio School

Ling-st., Croydon

A Special Class •1111 lw hl'lol , u·n

rm n..;:n \, f'fltlllllt4Jlf'Jtl:,! ~. Iii

\lar.-11, fur '''l"'rimcnJ,,.r.. '" hu \\ i,,,,Ji In ht•,·1,mr 111on·

l1rnfidt•n1 in \rur .. e. 'u11il- 11 ill ul,o lw

"'lu-t·ialf \ t-.,iwlu·d 111

pr•·l'Jr•• 1lw111 for C,u,,•runwn t L,aminnl inn fnr'l ran .. m;f. 1inµ 11ncl .H(•r,~h-in!!

l ,u·,•111•1· ...

Fee : 2 /- per lesson 7 :rn f>,tn, to 'l.311 p.u,.

WIRELESS WEEKLY 13

l•IIIIIJ l\lltl;J L'-'-l hr 11ho10, I 1\11 ti tl1t' r JI .tfl I loop

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\VlRELESS WEEKLY

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i1 ,·omhinntion nf the fwnuu. ... C-rimr,-: Tn , t•r;.~ n11plc~ am] llllt' 11-f ~,.,11 Tn'!• .r;art'c; not1· 1,·~•·m·ruli"'' ,•11·r111t-

Thrct.· ndn•$ .1ctuulh do 1he ,,-.. rk n{ lhc; IY..11 radif•. nnc · ,Jr•trc·. urid 1,,, nud io. It J)W\'r~ an t•};,·t·ll1·T11 ltr11.11l ca.;t rPr,+~••r. ,mJ g:i,·Pi- unhmn, cl

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I I

WIRELESS APPARATUS

New or Second-hand, Bought, Sold or Exchanged

HOWELL'S

19 Bar'ow Street

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i 75 LOFTUS ST'R.EET I

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j THIS WEEK we a re featuring all the necessary I i parts required to make tile CRYSTAL I ; SET as deserihed by '·INSULATOR" in this issue. (

} We are prepared at any time to answer questions covering I i any points not quite understood by readers of the article. f I CALL FOR OUR £)(PERT ADVICE l I I f u- e·-----a-i-,.-»11_, __ .~..---•:• ·=·--- -",_,.,_, - ..... _,,_, _ _,_~·-··C-...---•·-0- - ·-



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HOUSE 619 George Street. S:ydney

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D A V I D 0 NE S' J SECTION RAD I 0

R[MARKABLE RECEPTION

CA.UFORNIAN STATTON

ON 3 VALVES.

K.G.O. HEARD.

T lu• fl1llowing- j-. · • purl it•u of :r lt>L1rr r1·1,.'{'in,,i hy 11-..: froTil ont1 (>four 1·U?ilomt,r~ n~~ufin~

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D A V I D J 0 N ES

Radio Section, 252 York Street , S ydne y



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MANHATTAN 1.1..:111 ,our l>n I.il l Tuitt• ~11 1,

Red Seal Dry Batteries 1J.n1l ,.nurr 1011 ... ,•r M"l"\11, a l l,1" 40•1

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Red Seal Radio Headsets htt\f• m,Ul\ ,-.,mt .. o l .:uh1m1.a~r awl .. u,~rinrit,

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Fada Neutrodyne Receivers and Parts

Atkins Maclean Ltd., 350 George Street, Sydney

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18 WIRELESS WEEKLY 'l'linr~dnr .• \.pril 17th. Hl:l-l-.

The M oore Fund ~1aruial. hut H a elt,-Ef' ~tud} i'- mud,· uf tlJt• ll'-l"' it will ht· ~cen that almo~t 80 pn rcnl ,,t thf" 111ta1 amnunl hJ-: ht•1•u ~11h"i.l·nhrd h) 11 mt-rt h~11ulful of flnn~ encl P).pnim .... nl1.1~

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American Radio Apparatus Wholesale Only

-- .. PACIFIC ELECTRIC co. SEoCOND FLOOR, KLNCOPPAL CHAMBERS

No. 38. MARTIN PLACE . SYDNEY

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We are pleased to notify our customers, both Wholesale and Retail, that we ate now ready to quote for the erection of aerial masts from 30ft. to 200ft. in either Wood or Iron, alao £or Hags of any design.

B. I I . H H ETT ~ :-:< > X r-,; LT I >. AVl:NUI: B ll~l.\l :-1 EASTJ

Phqne W IZO;

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CNireless -- Second Floor)

I:, Anthony Hordero & Soos . Limited, ~ ; foick.Geld Hill. Sydney I Pbon• Ci•r 9'40. ffo1 2712 C .P.U,

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WIRELESS WEEKLY

\\' lllELF.SS INSTJTUTE OF Al IS'J'RA LL~,

.:\ Olt'r-'I IHJ! ,,r tlw Junior St",·t iun or tit,· ..... A. [lj\·jl"lihJl W.1~ lidtl vn w ~dl1('',• ,lni. \la,r 11 2nth. in th,· l'1i111•e ol Wn\•~ Thl'Jll c.

( h \ int!, to huJ \H_•a,lier dw au,·rnl• am. t:- ,q,.: mll 3"- ~mat a~ it ~hrnild hti•.-e ht·\.•n. 1ml 1:-I ill .J ver) t·11J11ynble and 1111..1rnrt ht• ,•\cnin g: ,,n~ ~pc.nl.

1 lw rhair ''"-"I"" •)\fnpk il h) ~l r. C. E. \ m , .... \\ho in 11µt-11.in1,t tlw mt'Pt in~ n··

,1nc-"'lf;><l w~1nhr•-r.: to t:.ndt-Rvour to gl•l 111hrr mrmher--. au d fr i1·1u]., to a twnJ tlw~cJ mN•t ini;:~.

\fr. R1ant1 gave a \' f"f\ interesting lc1..·tu rt on the Elcmt·ntnry P rinr-ipfos uf Wirele•s Tl'leirrnphy at the conr b s· ion of which he o.n.swered quite a num• h.-r of question•.

ThC"~"'P mt'ctin[!'!' hn,~ h~en ... wrted for 1he purpo'-f) of gi, inl! i11--1nwlion on<l a(h•it.·,· to I.ht• )OUngrr inutnher ...

ahhttt1~h many of Lht' nlrlr-r one..: ¼ill no tlo11 h1 oent:fil uy a1ten1lin~. thl' \\hi .It· uf llll' t•\f'ning hl'inp: <ll"voted lo l1•t·1un""I and ,li~•·u .. i;:;inn.

1 lu .. munthly grnnul meeting- of dw ~nutlt Aui-traliau rli \ i~i11n ttf 1hr- Wire• 1,, ..... l11-.1i10ii~ nf Au .. trulin wa~ lwl<I in llw l'r111t·,• o f \Vu l~ L,•1•tnre Tlit:alrf>'. Adelnirlt• l ni,c•r..;il), t1U \'Vt<<ln,·..,flay. April 2n<I

T ht•rr ,\a'- u l1.1r-!'.,~ nt1 t•11tla•1,·e a nd \ Ir n 8. ( ,Jil,..,,IJ pr..-.:,letl.

J li1• m inult'" of ' !1p pre, in u ., llH.',~tlOJ! v.t>r•· rP;11l ncl •·unfinnt:d,

A lf-'l t-£'1 wa~ n·c·tin~J froin 1l1t \\ j, :,..... \\'fekl ) t·cli1 or. r et1t1e~tin g. thut rnf,,rmn tic,n conrt•rnin~ rn<lio a('ll\ 11~..,... i i i 1hi~ ~ la tr. ht· forwnrtln l t•::1d1 ,\ ef"k f nr " uhli,nti11n in tlta t juurnul.

(',..mmu11lr:i1ium , \\t•f f" rt·cc.:hecl fr, ,m tlw \ ' i(-tnria n and N.5.W . U i\.i~ion!- rcjl;Ufl int dv~ fl' '-1 rktl,m~ on ~1~ U?' of rt•,1,•n .... rnthc rM~•lq~r...,. 1lw )\: rw Sout h \\ a1

1,.., r)i-..~inn rt>ip1ei-1 in~ tha t we apprt•LJ<"h 1hr Ch ief .\la~agN T r!e~rJJ?hs an,1 \'V in•IP'-' "' ith a. \ Jl' \\ w ~bol1i,.l11n~ Ilk n•.:trittinn!'-.

,. • .. · ,,., h··· .,lrf'lJth ._1pprrnu;i1Pd , 1r. )[ol , nP nn t hdl m alltr i.rn<l Lh1· 5ec.ri_•tun wns ret111P"'lf'd t n nolify 1h1~ I\~ \r. lli't·i~ion ltt 1ha 1 dft'l' l.

Tbn•f' fl<~\11 m ,~111lin,;;: w(•r(• t•lf'ct1·d H1

memlu r~h in. \lr. r.1,ok tltrn mo \·cd 1 ltc1v' n~ gh .-n not il·t• "t a p n •, iou.,

Pu/Jli.,lied t,,, A. W. Watt. ''Strnrhaird." F:n.,t Crrsrent St., M cMahon's Point, far rh~ proprietors and printers, Pub• /i,ity Pm,s l.td, 331'7 Regent St .. Sw/rrny.

'l'hnrsda~·, Apl'il 17tl1. 1!124.

meetinp. I tha t tettniu of ou r rult .. shou ld 1,. a lten•tl. :\Jr. Cook·- m<o• tion wn~ nep;al iH!<l. on l} tw-0 memhp· .. \ oling for tht: 11 lternt1on.

\ tr. llonn11r tht:n mo,·t!d lhat d ._pt-t• ial nwetiu~ he t·alletl for April 1-hh 1111 t !lt" 1rnrpo•w nf 1,~,mi.iut'-.rin,.: tlit

ruJ.;~. th i..-. \\a'- tarrif'tl unnrnimou-..h \ Ir. H. ,\I. 1Jurkc1 lak of Radio C.e11-

1 ral .'.'J,," York. g--.i.vt• a very intf"resti nµ. 1alk on Hjnt'!I to Amateurs~ gi\i1l~ a numbf•T uf eJrcuit~. ¥1hich be :ilat.rcl 1ha.t e\'ery experi.rncnter ~hould LrJ out. h .. also ill11,1rn11•d a numher of tliff,,,. ent wa"t:, of ronn t>rlinf! up .u dHul,I,.._ p11le cl~uLlr- thrnw ~\\itch for vnnuu~ purpo,~• .

• \[r • .Barker of,.., ~xplain,d tlic lorr,1~.mrthN I or c•nnnPrting c•kctrnlytir 11Tti lier~ fnr traw,:mitt ing. ~els and nl!-o the audio fr1•q u.,.nq tr:iµ fihl'r c1rc-u11 whit'h ht• ,•lai m~ to ~,·f' e'!Xccllenr n·• .;;uJt:,,;.

Ht" lhf"n ~pokt> ltr idh, nn hruud <'at-ti n~ m AI11e1 ira and ,·xploin.-,1 th,· po,;;iti1111 of d tf' ama1rur tlwn•.

The- ~,•rn•tary intrttrlurPrl 1lw m,1tt,·r nf hril<lin~ ~n,11hrr ~odal ami racli11

113m.·t· in tlw· lll'Sr fotu.n.·. anrl a I in• mill Pt' (•tin'lii-lin.u i,f I\Ir. IL J ,.., Au!-Lin. Mt. K. \'11sdham. ""<l Mr. C. 1::. Am•wai, appninl1·1l to orp:snii.;f" 1h..i~ fun,

lion. Att::-ntion o l tlw me.mher!", ,va. .. tlwn

c·n11etl trl tlw \loon• Fund wltich i .. iu op('raliDn -in ~y<lnry ,md ii ""a"" 1I,•r1,l.-,l 1lm1 t lw sum of .C.2 2 • bt' 1lnna1t·d lo

help tlw " id,,., an<i l'l1il<irrn <>I \Ir. '1oort ~ho L111fortunatdy fost hi-. lit-= whi lP car-1 ying 11u1 r xpr-rlnv·nt ... in lrnn .. -

mi.;c.inn.

2GR.

Mr. J. !-. Mark, 12cr: 1 ha, r,•rei•• t>d w o rd (rom Stanl,·) Prie1·. uf C.hur,·h ill. Q1ieen,lanrl. thnt hi, ~vn•ch anrl r..w. t'tUne 1hrnu,::h willJ remarl uhle punrh ant.I rlarih ioOf" mJ;e,ht rt••

l'~nllv. 2GR ba• also rcccive,I excrl lenl · rirp<1rtQ [rnm Porr ~fore,.h, .1n,t ~ U \"ll.

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Ith. At rioa('f'.: tran~t'r,rmar 1nanufn,~tunrs., Jpffer.on hn~rnt:era fle-.;dgned andio aruphCiec• Ion!{ lo•fore a,.. dib r4'arhf'd it.s 11r~.llent, popu.lA.r11y. \ nu will apprec• bto Jd!'~rsun'1t txtra year, ut l'X(>er~nr~.

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