Fisher CUSTOM ELECTRA K 14 Service Manual

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THE

FISHER

RADIO PHONOCRAPH

SERVICE INSTRUCTIONS

CUSTOM ELECTRA ' SERIES K-IA,

PRICE $100

FISHER RADIO CORPORATION ' NEW YORK

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THE fi/j

FISHER

CUSTOM ELECTRA - SERIES K-I4

THE FISHER Z-MATIC " CONIROL

The ltiudtpeuker ytttem has lung been tetugntretl 43 mte til tIIt m..tt
itnrtirunt lirnttttiu tutors in the IJIIIiIuI IEPIU-jdeliiJ". of high we
stiund Where a luudsyeakcr bears the typical Spttlhlaflun' 7 Volt: CIJII
Impedance 1v uhms'- - it should he noted that this ipecitiutiun tezlly
.tpplies only [0 1 Emir/n! pnrflmlr oi the toul ltequcnty unite 'Ihtv rumn
is thur .t speuker twice toil impedance ItIulIIy \flrleS quite murkcilly. :nl
uicnrdtng If) the partitulmr putnt u! the auilthle \pertrum an iltretl Tht.t.
a typltiJI I." speaker med at H ohms actually hi Ith Ifi-t-hm ImPE'tinnir
at «()0 CytItS At R3 tytles the wire mil tmpcrlmre multl he .my-wherr
Irttm (it) to 9|) nhms.1nd at 10.000 tytlet imm it) in in nhm. See Fuzufr l

The steep rue in voire uiil impcrlanee in the .0m- 100 ~'Iryce repitn it
pJIlILuIIII) serious. lot it is utterly in this portion at the rut. Itle spentrum
that we need .i guud impedunte mutth hetwecn vzitt'e mil JILI ampltnc:
in order to reproduce with tull rithness MILI'I instrument: .u the tyiii, .Inum.
It»; vial, cello. organ. and the bottom uttave oi the piattu. And the steep
mt.- in VUILI. cutl IITIPCLIJI'ICE at the high end dun-aw) treble response

All typttul .Iniplthets ul better quality- IHJIII tcdy have not Like" the 15mm
impedume tnatthmg prnlxlern mm ((EOUIIL Thus. Although the elccrr.r.tl
thuraittemtitx tit the ugnul up to the voice mil mAy' him I JIUIOIIII re-
SPUIHE, this it promptly :iflet'teil hy the tmtxdante variations iii the loud»
th'lket system Although the VOLTAGE delivered in the Inutltpultcr
remains contrant regardless ot treqiienty. the POWER alstmhei. by the
loudspeaker will not be constant beiause it is a tunuiun ut buth voltage
.m.1' load remunce.

At .m emepIe, Iet tit assume that a -HO-tytle tune IMiiiule A on the
punm is intriiduced [U the Ivudspedket At this trequettty the voite tutl
impedantc is actuJIIy 16 ohms. a: )pegitted by the tpultcr mmuiauutct.
Let us iSSUfl'IC further than the Voltage ruthirtg the wire (till I\ 4 vultt.
Under these tonJItiuns elettnul ymwer Will he I wart Let in ttiiv. .tttr-mpt
It) reptudute .in tititm lune 5 uttttvet t'uwrr [35 (p5. and UP riumi intent
tity The impedame oi the loudspeaker at tht> frequency wuuld in this
use be about (>4 uhms rmd tn many uses loudspeakers have even higher
vuite toil impedznt'es as one apptuathes their resonant frequency 1 INS-
miith as power, {or .t mnsrant voltage. varies inversely with the load im-
yx-ilunre. the result it that only 1; 1.! I I'd-Z at power will .irruully he
zihtiirhutl and utilized by the weaker on the .ifmementinnctl man t<.ne.

Ir tin-refute hilluwt lh. the ideal gm] is tn product an .tmpliticr tonutntng
spetial tiriuitt ttut rtrugnue the nonvunilorm rmpcdmre nI luudspmkers
and PIUVIdC the trteam til eliminating lhl) inhemnt misrmtth. We .ire
proud to announte thrt this luttpt-wuthltet ttual lm tww hen readied
in THE FISHER CUSTOM ELEt nu These SPQUAI LIKUII: in- what with
prise THE FISHER Z-Matit Control

'I HE FISHER Z~t\Idth (irtuitt Will not only supply remunr putter [U the
Itiqupeakcr my {t'eir of its Iu-Id impedante but. lurther. will at the mere
turn at u untrui knnh provide Minimal compensation to balance the
\atlatitlns ml the ltiuthpeker. its entlosute. or the JKOLISIIC Chdfdtltllfllti
«it the nnm.

WHAT THE FISHER Z-MATIC CONTROL DOES
The unusual tirtuitry of THE FISHER Z-Matit Central tantalize/1'7
rorretts the impedlnte mismntch condition deathbed earlier. The Z»Matic
Control is cantinuousty variAbIe and an be set at any desired paint to
wit the requirements at the panicular program being reproduted. 15
afietteil by the existing speaker system. speaker enclosure# in IJCI. the

(nlln cIelIrKJI ANSI .ittiustiul system See Fixture 2.

The Z \I.trit: Cunttol aurtnntizruui. multes the mrteaions {m varying lnad
impedunte 3-; :13: rue: .tcgru- aimed b3 the It!" to meet his part ultr
.iwustit ind emrtrnnmental {OndIHUHS The results are truly revulu .try-
.md thrilling to hear, tor Z-Matir opens .a Wide, new door cn high ncelity
sound rcprutlurtion.

IMPORTANT NOTE. THE FISHER Z'hJlIL Cunttnl .It es Ith an urdt-
nuy Bust Tune Cnntrnl. or L-udneSs BaIJnte C-intrtvI, [J'ILI-l do, The

7 71:.I'ti]i(lliitlII.lf
.turtittmtt l r Ill\
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- t.i.-.i III: ttxmt itmul

It' in; \

now to Aemrvr MAxtMurtt ENJOYMKNI or
In! FISHER Z-MAIIC CONYROL

\\ m I .'II<'1 \lm. (- nt~ . |\ wt .tt :n.nt::iunt. the JmFiIIlL HI .iremtt-
'1 the n my. 1-".timunntt.;r.Iu.lt.; t mum ti luuc rLJerJn -ti 1.1.;

L.-: I.» n. n ..rilll.llI\ . \uth the :ut ut the twp Ir: thn
tint put the li ultpulter r6;31Il'):.I \Iltuv
l'. Intro. e Hign quIlI LLJAEI uttuntw IEIl hi, incr~
ieritt II. I per .m I(I when tht Lunttul it in 'hn pmittut', Arty
risr tht Inf putt ti priidums tnuctstnu multtp IIuJII n VI the
chtrriu! utt. rt neteuan it; : \erblme the \i it Jutin: ., t the spuker \titcm

«'1 the (i

Jnl mutter criti- \utt

The Z Hutu CIVIL-VI ml. at gnu rte. N mmt appirent in the max-mum posi
It in .irzd. in nurv tJL reprtuntx (In. iInsett apprtriili r; tru: v UnlIi. rm
ItPx'r"iCIl1?t.lTuHIJ't [Uii i r huh it Are.- .t. l rlit: .ilttmtte Ultctlun

It «m-LJJ He ncirl rhu: the Eh! ptiSlIIiirh iICSCIIICd wire nrhitrtuy. Itir
the purV-ws v-t the Jittuutitn Their .tte .in :nrinire number tit interme-
Iuit' ,- ittt.n~ Jutlurle. .ttwtjtnu t.-. IHUI t.t~tt't .inil tttt-ils May at; sug-
gt VIN! tut. uxpcrxnenr With the Con'tnl to Iatntilurtlc y'ttutu'll with its
trencnhut ptvmhltttua tut inrrmstng the entuy-rnenr uI y-iui equipment

I\lI(tRT\.\'T NOT}. W ttIt turnt- spctkcrs (ULRICH: the Z MKTIC Cunv
rrt-l nIJr mud in .tn .m-r-.-ll valume thing: Thts condition n rauseJ by
.t ~ t.:ht ntttmutth it Iyttn \pllhflf .th Amplifier iA ntimtnttl IGuItm
\tl r- e .tl niiy- n: i he t-uitly lr: iihn-is .It mid trequenciet.. A: lung in the
(hinge tn \ -.l."iL h it t yetcre the I.- \IJtii, Lt. LLIII wtll upetzlte cfletiitely.

Al YOUR SERVICE

It t\ the .unétmt June at I tsher Rfldh} Corpoutton to have your FISHFR
equiriut-ttl _t.:t\e yt II I Itcfil puttible petlortnant'c. Inward thAt objective.
we «.ilttd you: tritrntnvntIr-nte utt .trty \petul pttthlemt that may arise
Alter you hive hwl in nryxtrtunity- IL) Inmilidrtte ynuncll with IHL'
FISHER equipment t-uu P\IIKIII)(:I. we WutiIJ apprerutc your letting us
knuw how it I\ meeting y-uur requirrrneitn

SIEUAL NOTE "In mutntarn your equipment M peaIt perturmunce. may
we \ thfit :hAr you avail y'outtclf ut the hrtltttt-t .md Littory trained
[VIUYIIIGI At our Sen/tie Drptrtmertt.

FISHER RADIO CORPORATION
Zl-.l Furry-titut'th Drive
L..tt_.' Ishml City I. N Y,

IIGUIE I. IYPICAI. IMPEDANCE CURVE - I2" SPEAKER

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"' u too too A00 t°°° woo tapoo motto
r-rmnev in cvcus rt- steono
"our: 2. man mutt: noes FOI me SPEAKER
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POWER MIOIIID IV inflil

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' PAL PEND.