Hammond Instrument Co. J. Solovox Schematic

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Model:J. Solovox
Manufacturer:Hammond Instrument Co.

Schematics Content:

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Page 1:

HAMMOND PAGE 12 1
err v* ""?' g ? 3 S I5 8 7 S g
| '|~`l SHIELD 2 COPPER YI 6 Ill? GRKLN GRAY VIGLIT WW IIHY I OWN
1. 2? mn www ? y f q 9 Law naw; aww. >
"I ' I I-Sl BLACK V
"nfl iz' Nfsgummlurcx iw :annum ?_ gg 2 "QW 1-ws nu<=v\>?? nn-w mseu wan uma: vu. M =
?>>.u.f. >>m>>=>>\>>" .ua um enunmm ??""'>>?'?'? w|wlNc DIAGRAM - soLovox- MODEL J Q
(C)John F. Rider, Publisher

Page 2:

PAGE 12-2
HAMMOND
MODEL J
HAMMOND INSTRUMENT CO.
FIGURE Z
SOLOVOX TONE CABINET Tggrf
` vacuum: mama naman naman
coo
noon
11 anew
You
nun
GUY
Queen
SHIELD
anown sumo
RED Yl-
1 4 can '
new
own
a z new swam
was U
>>- zone eco sooo sooa
(C).Tohn F. Rider, Publisher

Page 3:

HAMMOND PAGE 12-3
HAMMOND INSTRUMENT CO. MODEL `J
"Un <?"Y"'\?' ` nnvgvnw umm Mun
\ \?`: _ SOLOVOK TUBE SOCKET VOLTAGES
umm: sun or uvnnqm' on I
\ FIG UR E 7 \ | I
Tub: V95:uhodc _ ;2? \u\1s F;ram1'&\\f\cr him 1'?1m|n;\ |i1pm{1?\? lgmi k Id 1
fubts V11 and V12 cathode: |10 111115 Co|\lm111|b? Cakhodes Kubzscuxoff) _ 49" I R M S
(C).Tohn F. Rider, Publisher

Page 4:

V l-lnlainy anwn ibn F# bny in :he middle nninyn nf ibn snlnnn, nlm
? _ipglgl 5_ innnninnni will nlny hiybni ibnn ibn iigbi niinb in ann aiinniinn, nna
3 _ ~ > __ V lbwni in ibn nibnnwbilnln ibn nnngn bnnynnn ii will play an F# note bf
9 Q i _ > ibn "inn nnnh nb die second hxghmr F# key on the piano, nn pitch mn
y S bnnhnnkna by ninkinginrn ibnubnin is no niaann innin in pinch bnnynnn
id , _ ' u _ V ibn snlnynn iniaaln bninyn E nna :he bigbni anlnyn c. When ibn nnipnn
_ "_?m% __, W W _'__ W _W nnnb in aninnnnnaa, ana the fnnbnn nnini in :aah annniinn when in will
i bnrn nninnnb nnniiiinn in nbnh bnnynnn ibn E note nf ibn aninyn being
'_ "*" _ y =\'1llll?=d. Ind me C nose uf che nm nnuyn nbayn_ whiny, lu, "md,
il l Q; _ rn aainn ibn fnnnb nnnillnnyn hold any-in ibn Inwnn nnnyn F# hy
.. ...nn mn., ll in :?.z:b-' _ W-=l= -mlv =l>>< "C0NTlv-l:ro." and 'DEEP 'roNE~ nnnnan in, nn,
Wag, ima Yglhlw 'UF kg; _ _ nd DEEP TONE. balainn
,,..,.,_ ""?= yi 'ar sf in each mn,
wninn l) . The maximum volume bbininnbln is nnnnbllna by n bnbb lnwna
nnnin. nnnnnn nnann ibn keyboard in ibn lnb ni ibn ynlnnn cnnuol, nna nngnlnlnn Lhe
` Ml- =?->>f~=?-4_,M_ "_ nnninnnn lnnannni when mn bnnnnnni-.ina lever ix nll ibn way in the
ibm' ?:::::' _g5,;,,, mf ggi," wg; i-igbi. wiib the lnyni in this position ibn linnb nny bnini-nna bynbn player
' lglg-glglg Iglygnl- >> lnnnnannmna ynhnnn nnnnnl as fn as il will nn no ibn nigbi, hnla any-yn
l __ Q nbinn kny nnnb as middle C, and nn-n ibn innniinnn-. ynlnnin nanlinl knob
7; '>> ' fr ' z~, 1 ' ._ Inf _ 7' - i _ i inibniinbinnnllbnynlnnin bnnnninnnnlnnani innnnfnl_ Dnnnl nnn the
knob in ibn iinbi any farlher nn in an nn will only innnn ibn ibn bnnn.
\___ MV; 1_%n5EUR:5.nny _,_ bpnnnlna ynlnnin nnnnnl will bnnnnin nnnnnnnniily nnnniiiyn wbinb in
` 8 U FIGURE 4 V When nlnying in lnign hnlb, ni wiui nibni inninninnn_ ii nny bn
{ ` l unani ihnnn nnnaiiinnn, whnn n ynny lnna innn in nlnyna, ibn qnnliiy will
l bbnonin uni-y bnigbn Thin innnwn ln bi-illinnnn produw many novel
? T"'">>=' innn nnnliiinn which .in useful nnani conditions where n lnna piercing
i ix ro be played, n tuning nainnnnnni bnnb has bnnn pinyiana. <'l'bn tuning
knnb, nbnnnbn nine of :he nna bf n pencil. pl-bieen lbinngb ibn nnyna HOW THE SOLOVOX WORKS
' """?? ?""? "'??d"?"' ""' ?"? ??'"" "f 'M """ ??"'f""> All nf ibn nnnn nl ibn Solovml .in nnnnnllna by n ningln india ynnnnnn nibn
5 Tuning ibn snlnvnn in n yniy nininln nnnnnn nn all nf .bn mn, an innnnn bnnillnini npninnng nn ibn nudib nnnbnnninn of ibn bzgbnnl nninyn bl the
y ` binnnllnnnnnnly ninna by nnnlning il-lin ningln nainnnnnnn Clockwiu: nnn. innnnnnni (209&395l n_p.n_>, Ennb iinin n key is anninnna, n switch nnani il
i inzofrhe knbb lnwnmbe pinch and cnnnur-clnckwix inrninlz mimi; runes :bla mum oscillator ln lh= l>ir?h aswcillmi wilh dle kw in lhis hizhefr
For greens: zncufalcy, only ibn '-col~m>m=m
nmyn F, F# or G key: bf ibn snlnyni innna in ibn nnnnnnnnaing nlnnn lovlsnffgnnnnny. If n "sf none is annmna dn frequency will be 3951 =>>p.=.,
nn>~>?=ll=d EM lwllns =dluwl-wm m ll\= ful-m #ff nannna bn bnnillnin nl one>>half ibn finnnnnny of ibn lim oscillator, This nw
wmml all lil# h=?k of ?h? mm =l=ln=L W= \llzzwlh=iyl1lll==-ve rhll frcquency nnnnnnnnan in n nnin nl niinh one nnnyn lnnni ibnn ibn bnlzni
nlbnn, nnlnn you want ln gn into mmnhing cnnniaei-ably ninin nnninli- _ ,,,d||,,,,,_
f anna, which inanvnibna further on in the rcchniml section ohhia lnnann _ _ _ _ ,
sinialii nnnnnana nmllninn provide nnnhn of iwn, anna, fnni nna syn
Whernx the ini-ning nf ibn ningln nining knob mncs all nnnn nf ibn lawn nnnannnnn nnin nbinb is in nan bninnnnnlninn in ibn ninbni, ann fanning
snlnynn, ibnnn ix nf nnnnnn n lbnb wbinb innnnl be nnnnnana bnfnnn snnin = nnnnn of nn nainn in ninni nnnyn nnlninnnhipn. The nnninnlnn nnnillnbn nnlnana
thing seam in gn wmng with bbn nnini in nnnn Gwyn.

Page 5:

HAMMOND PAGF 12 5
MODEL J
HAMMOND INSTRUMENT Co. SOLOVGX
The ()r?-ill/non
All llia tones ofthe Snlovnx ann nnnnnlled ny a iinglg yannnni nina
oscillator eallan llia "MASTER o5cll,l.l\1'olz" (Vl,Figure 1l.11ii>>
oscillator nnnlalei nl any one ofthe lwalyn audio iyaqnannina comprising
the iwalyn nnwanl an liiglwalnnlaya .anga nf inn instrument (2093 ny-al..
ln 3951 nyelgil. Eanli iiinn a lny ii anninnaa, a nnnlanl nnaan ii aim in
inns this oscillator ln me pitch amaialnd with that key, Pnl innanea,
whenever any C key is depressed (mel-e are linen c keys on il-ia key-
board), inn inannnnaaillalnn ii tuned ln 2093 cycles. in lnwnl fmnknay.
oscillator will nnannln at 595l aynlnn, in liiglian frequency,
lf, on the other llanfl, any nnn of ins three E keys is depressed. llla nniwi
nsleillztor will nnnaia ai 39Sl nyalaa, in lnigln-w frequency.
The cnnderlsers which tune the master nscillator are shown at the
left of Figure l_and are located in the vibrato bnx fastened tothe Solnvox
The output of this master oscillator crmtrols the frequency nf the
first controlled oscillator, called the "BUFFER DSCILLATOR" (VZ.
Figure 17, which operates at the same frequency as the master oscillator,
Enllnwing lliia lnielai oscillator ia ilia SECOND CONTROLLED
osclLl.A1'ol<, whose frequency is lnned in approximately nnalialf
that nf the llaqnanny ul the nnlinl oscillator. Furthermore, im frequency
in nibilinanl in be anannly nnaliall that of llia buffer oscillator by apply-
ing a ~lnaliing'~ aignnl finni the lineal ninillnini tn in gna eiinnii, 'Flin
amount nf lliii lnaleing aignnl ia ingnlnlna ny a nnlanlinlnniai. rlnn,
llia nnlnnl mqueilny of llla wanna controlled nwillalnl is an nylaya
lnwal in niinli llian inn master Usmillator.
siniilnily, llin iliiln, fnnnli, lilili and sixth CONTROLLED
OSCILLATORS ninyida innnmiye outputs of ninnlly lwn, three, folur
and liya cctaves lnwni in nnali nian ilial nl ina nnnni naeillanyn A nnnn.
tiornetel' associated with each provide: die correct amount of locking
lignal. ll is in be nnlni that these controlled oscillators owing of the
ialanaiinn lynal, an yaanily tuned lay alniing their gnu nina, lt is ing
lnnnlinn nl ina nining isaisinn in nannllnl will ilin nining annllnninn in
apply ina annniniiain gna lynn ni nina all uf llia controlled naeillnnn
iiinnliananniily in their annniiiiinaln nllnnnnye frequencies, The amount
of lliai varies, llinanding upon wliinli tuning contact is connected by a
nlaying liay, nnn nn lnannanain nf lln controlled oscillators aliifl
wlian nn liay is flnnnaananl, all llia nanillanna operate nn their liigliaal
pitches ("B" notes). Thus, whenever a key other than "B" is depressed.
Ill oscillators shift simultaneously from their "B" frequencies to the fre>>
quencies corresponding in ina key agplmnn. nn inning nnalianyayi
nrrlaruwly Anne the marrn nsrillalur, :md the trminl lerirlon time /he
Enyni llin alloys, we see ilial whenever any one nf llll three G# lnayi,
ini inayannn, ia iianinnnaii, ing nanillanns ana lnnail in nnnyian n miss ur
G# nnian in mai nnlayn islalinns, The anlnaiinn nr llia nal-lianlai
naaillann nnlnnl in annna llilnngli the snnaknl is il>nl1l>lTllb:l VII and V12
As mentioned balm, llia nnnlnyl nnnlaan under nan nlaying kay.
serve in ininnya an nnnff liiaa fnnn control nina; vll and vlz, an wall
as in npai-nla nna of the three nalaya, Tliil ii explained liy nnniiaaiing
that ala nallinnaa nf lnlm Vll and viz an annnnnlnn ln the nliilnnini
ofthe volmge divider ilinwn in llin len of llin nontrol tubes in Fignla l.
wlian nn playing any ia anwn, ana ynllagn is annnl 165 yoln nniiliya
willi respect ni ground, anal, llialafnin, ilinin tubes an Cin na, When
any playing lnsy nnnnnl nnnlafi is alma, the resistance ol me relay nnil
is put in nal-anal with me woo nlnn mimi and mil causes llin cathode
ynllaga an nnyn in so volt; This removes illa nnlnsr bias rnnn lnnai Vll
ina viz, wliinli ana of the nannnn nnnnll yyna The l? inl

Page 6:

l~AG1~, 12-6 HAMMOND
MODEL J HAMMOND INSTRUMENT co.
PRACTICAL SERVICE SUGGESTIONS
Tha lnal?liala and nllnllifal palla in lhn l-lalnlnnnd sdldvnl are df din
lineal qnalily alailabla. Aside ilnna nlnaainllal lnplananianl of a i-annnnl lnba,
nn annlinn plnblann nnnd bn nlpwldd ln align. A fan gnndilinlig whinh lliighl
pnlaibly be nnnnnnlllnd ale Iislcd hnlniy wilh inlnllnalinn whinh will ?nabla a
radio aalyina lnnhnilian ln nnllnll lhaln nlilhnnl dillinnlly. snnin addilinnal in-
fnllnalinn nsnlnl in the gnllica lanhninian is in lha mal section nnlillad
'~TUNlNG AND SIMPLE AD1UsTMENTs."
ll any of lhn lnllnwing nnndilinnn nppnal, lilal lnalln lnla lhal lha lhm
cable lnnnanlnly in lhl lnfl cud of lhg llnyhnald nndgl lhl piano are wnla. The
faces df the plugs and lhlil lanaplaclea should be lngalbnl. If lhg snlnlnil diana
nnl play plnpni-ly, lhin il lhn lnnal llllnly ganna.
l. clinging lnbflvrhaln all fnnlmn lnbna in lhn snlnlnili sin lypn 7A4,
fnni- lynn 7A7, lwn lynn ms, nnl lypa 7B6,1nd nnn lypn svscl. Thang arc all
nlandnld radio lnhnn and can be langd and laplangd, if nannnaaly, by any radio
dnalgl. All lnbna nan be lnanhnd flnni lhl hanll nf lhn lnnn nnbinnl. A lnnlnl gnald
gnynling lhn lnnnl lnw nf lnbaa is naaily lnlnnlnd by taking nnl had xlnwa->>??
Fig. 4. laaanln lp lnnlann all lnbna in ll-le "acl adnllnll flnni which lhny callin.
If any nl lhn 7A4 nibail aln laplangd, lhn nanillaigla should be lgadinnaa aa
Th: nln lypn VA1 lnnllnl lilhna (VII and VIZ, lpcalall in lhn alnnlinal
ll is therefore lgnnnnnandnd lhal bnlh ba lnplacnd nl ibn aanln linac wilh new
cubes of lhn aalnn lnalla.
2, sgnll ynlal ,ill noisy nl plny lhl lllnllg pillh. If a nnle ii nbiay, il may
be due ln (A> a fanlly nngillalnl adiusrment, lm li faulty lllay nlnnadl. nl (Cl a
faulty llny nnnlall. Tn nanallain nhinh nflhgng ii lhn annie. lnllnwlhia nlnnndnlnl
my If the llnnbll lies in n fanliy nanillalgl adinallndnl, the nnllnapnnding note
one inlaid lnwnl in pillh will alan he nniay hnnanaa il is nnnllnllnd by lhn higher
nlnillalnl adinalnigln ia aalialallnly, ln lhg li din lhal lnadinalnaanl il nnnnsnaly.
nhanll an dnanlibgd in ~rl.lNlN<; AND SIMPLE ADJUSTMENTS." l>> any
nnlnl alill do nlil play nnllnglly, laplann lha 7A4 lnbg aananialnd with lhn highlal
pilnhed dsnillalnl lhal faill ln npalalg plnpally on any note. The fnllnwing chan
will he helpful in Ending lhn nnnillainl alannialad wilh nnlga of any pnllinnlal
"BASS"ConKmI Connects ro , ....._ 6\I\ Dsc. Sxh Osc, 4th Osc.
"'I`ENOR"CrmlmI(Ionncclsm. ,_.... . _ Sch Osc. hh Osc. 3rd Osc.
"(ION'l`RAL'l`0" Control Connects m _ . 4r.h Osc. 3rd Osc. 2nd Osc.
"SOPRANO"(Eomlcll(1onneclslo.. _ . 3rd Osc. 2nd Osc, Master Osc.
After lhe lube has been replaced. resel :Ile cscillzlor adjusrrnen! polemi-
llmcrcrs-'sA:? page 2, "Ad_iusxmenr uf Oseillalors."
ls; If lhg llnnbll lil; in a fanlly relay lnnlanl il nill ha plgannl nn all I2 knya
nl ann nf lhg nniayl glnnna and will pnllial nn lhyna I2 llnya lngaldlnla nf ihn
nnlnbinanpn nf playing nnnllnlg land. All nnnlanla nina ala nl pleninna lnnlnlial
an lhal in all plnhahilily n palligh nl linl hal lndgad bglninn lha annlann nlhinh
lnay be naaily cleared by lilling and wiping lhn nnnall. Nall lhal lhg lnlaya an
accessible nilhnin diagnnllnnnng any ililna, il lnalnly baing nnnamly ln alll
.annie .ha nyn lnlgn nnll li blnh hulrl lhn lnlay aaaglnbly ln nan lnnn lablnnl llanin
llnlll. Aflnl lnnlning lhnla lpn nnla, lnni nynl lhn annnnibly and lnnnyn lhn
fnnl anlann ilhilh hnld nn nngl plain. Anal lllnnling lhn nnyal plan, all con-
lanla will ha readily anlniaibln.
only on one nina In lhil casa, lnnlg llig bna hal ihihnla al llnanlibnd in lhn inlllnl.
3. zlllllllmnl ln/l ln play. oldinalily lhn nm lhing ln do in lhia case is ln
nil all :hc lnhna ll lhn lnbaa an liglnld, lhn gabll plugs ala making plnpnl nnn
nnninl., and ing nnnllala all in playing pnailinn, the lnnll lilllly nnllnn of llnnhln
is in lllc amplifier circuit. In mos! respects this is a convenlinnal ampliier circuit,
andthe voltage measurement: given on page I3 will enable a radio service zel:h~
nician to locate [Ile trouble.
4. Kay l/lnlnpl nl llillll. If a nanaignl new in llin fnlln ni an annnying
lhnlnp appaali nagh lime n hay is lnlnasad, lhn lwn lypg 1A7 ndnllnl lnbna (VII
and vlzl aln plnhably nnl lnalghad plnpglly ln lhia gang, inalall inn naw lnbfl
ol the same make. A loud click each lime a key is released indicates that :hc crm.
5. Ham. An excessive 120 cycle hum in (Il: speakcr indicates xhzt the filtrr
chokc ( L91 is de1'eeri\':.nronco|rhe filter colldellsersisopcn.
b. olla /aly .xnll llnl lnnlld. If a nnllain kc) faill ln play nn any ol lhn llgialel
lgnllnla, il plnbably hai a dilly nnnllnl nnnlanl nhinh can be nlnalnd laaily hy
ahifling din nnnllnl gnnlanl hnyhal nhlnn adinnlnlnl la al lhn lighl and nl dll
knybnald. 'rn lnanh lhg bni-hal sbiilala, hlal lnlnnla din ing lnnldnd ballaliln and
cnnlall ahifllla ala allangnd. lnnaan lhg glanlping aglnn and Shih lhn hnnbal
1. ol., lay plnyl llnll "B" innlllll la/ ill lnllnnl ,lilfi in-nh nllinnl-nl /alll
y-/,lying nnlylnllyl. li lhia nfnnll, lhn lay nndll nnnalinn has a dilly inning
llnilanl whinh nan bn nlgalad laiily by shilling lhn inning annlanl bna-hal hai illg
allinnllinnl al lhg lnll end nf lhn haybnald. This in lnaghld an dnnnlibni in ill.-
li. any nailing n, nnlll /nill nl plny. ll a llngla nnlail nl lhn snlnynl llgybnaln
faila ln play inl arlycol\1bilnriun nf lhn lngialnl gnnllnla lhn llnnbll is plnbahli
in lhn lalny ainnialad wilh ihal nllaln nl a will leading in il. chngll lnllagn in
lhg lnlay coil and ihn nnnllnl lnln gallandai lvlo and \'lI\.
9. ,lil/nllnlnl ll/ Manny ollillnlnl Finn Tanlllg cnldlnlnl. All addilinnal
inning adinalnnnl ii plnlidnd in lhn lnlln nf a anlnn- dliinl npnlaldd llilnniinl;
nnndannll al lhl bank df lha lnnn nabinni, nppnl lnfl hand nnlngl lsla Fig, li,
glnnndingly annillaln inning il lannilld, lhin ndinllnnnl niay nnnd ln bn lnadg.
Finl, hnwnlal, alwayl nina al dmlihnd on pagn 1. ll. aflal inning F. F= nl G.
il inlnnnd lhal nlhal notes (nwst lillnly c nl Bl ala nnl nf lnnn, lha inning blaadlh
(al Depress lha lniddln llny wilh lhn "VIBRATO orr,-~ "CON-
'rl1ALTo," and "DEEP 'roNl5~' conxrolx pnahnll in. Tune lb anln baal, pl?f?l-
ably n-ini a ldanillinnd Organ, nl piano which hal just been lnnad. ln inning lhia
nga iha inning knob nf ibn lnna aahinnl. If il il lnnnd inipnaaibln ln lnna lha
yyilhlhg inning llnnb, lha inn wand mlm al lhn inp ni lha lnngl lnay bg
lnnaanad, and lhg hlanll ballnlila lnbg lnnynd ln a pnlllinn in lhg inning nail angh
lhai lhl langa of lhn lnning knob does nnlal lha nnllgnl --<;" pilnh. laninln lnalll
ing lhn adinallnnnl, be anl? lhn "VIBRA'l`O" anilnh lablnl is not all niidway
between in nn and all pnaililinn Pnl lnlnng pnlpnaaa, lhg "VIBRA'I o" lablnl
lhnnld ha pnlhad in al lhl top of lhn labln.
lb; Anal inning lhn ic" llny wir|'lrh=1\lning llnnh. dlplall a 4-lv' llly and lnnl
ln nnln bent wixh lhg screw dli>>?l npalalad llilnnling lnndangal lnnalnd in
bank of lhg lang nahingl, ann Fig. 4. The innlnnlnnl will nnw be exceedingly
DIRECTIONS FOR QONNECITNG ADDITIONAL
, AMPLIFIERS TO SOLOVOX
addilinnal aniplihlla lnay hg gnnnannd annm lhg snlnynil lninn coil lnnlnnala
ninnd Organ rnna cahinnll all lnnnlnlnnndld as lhly nlly be cnnnlglnd with
no changes nnnannaly nlhnl than dannling a push-pull glnnnd wish inn zoo uhm
laainnla connemed ln lhl snlnynl inina coil lgnninall and lhnil innnllnn pninl
ngd as a glnnnd lol dan hlanininnd olgnn Tana cabinal. lly lnnnling lhe
millnla in ihn l-lalnnlnnd olgan Tone cabinnl, il is only nnnlaaaly ln nln lwa
Willa (they need llnl be nlinldnd and may bl as long as zoo fan) ln ing allla
(C)John F. Rider, Publisher
alarm. seam mllvs -lo mnlslen "Ei
Pas- ,AWE -,ML m,,,m_ Pawn 5
mnlrlsn conrrxoua runes '}'f_,':?'?" 3

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