Churchill MX601 User manual

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"'STEREOPHONIC HIGH fiDELITY RECEIVER
• AM
• FM
• FM STEREO
•
•
•
• COMPLETE STER·EOPHONIC AMPLIFIER
AND PRE-AMPLIFIER WITH CONTROL FACILITIES
•
•
•
I N T ROD U C.T ION
It is es.~ential you read fui$. instructkm h:o'ekl~i e.3:Ee[Llily hefore op.erating your
Stere'0.receiver. Y'GU have invested in ·aBne h~gh fidelity stereophonic control center
into which many important and ex.ce;lJent engineering developments have' been
incorporated. Each is ll~ces:sar'Y f011the Jilr0J:?er opeIation of your syst~m.
This ins·tniGtioll l5ob.relet has been written in simple non-teehnioal lariguag«,
If Y0U will take time to read it first befpr:e doing anything else, you will find it aa
easy task to install and operate your new stereophonic receiver. KEEP THIS •
BOOKLET A\{AILABLE t\.T ALL TIMES FOR IT 'C0Nr AlN8 INIlHSPENS
ABLE TECHNICAL AN'D SERVICE lNFORMA TIQN.

•
WARRANTY
We warrant each.stereo receiver to be free from defects in material and work-
manship under normal use and service, and in accordance with the conditions
herein below set forth', for a period' of 1 year from date of delivery to the original
purchaser, and agree to replace or repair any part or parts, with the exception
of tubes which are under the manufacturer's 90 day warranty, returned to us
... ' "-. .
within said 1 year, with transportation prepaid and which our examination "h ,11
disclose to our satisfaction to have been thus defective, This warrai.ty does n~
include free labor, nor is it applicable to any instrument which shall have been
repaired or altered in any way so as in our judgment to affect its. stabi!hj or
reliability nor which has been 'subject to neglect', misuse, abuse, negliges-c. jr
'accident nor which has had the serial number altered, effaced, or Gl)j~" ed.
Neither shall tbis warranty apply to any instrument which has been GI)Y'li -, ) ~',:l
otherwise than in accordance ;With'instructions furnished by us,
1, I'
This warranty is expressly in lieu of all other warranties, express, o'.),LlnpUd,
and of all other obligations or liability on our part, and we neither -assume nor
authorize any representative or other person to assume for us any oth.::r/rtab~:ity
in connection with the sale of this instrument.
" .
GENERAL DESCR1PTION
Your stereophonic high fidelity receiver is a versatile instrument capable of
exceptionally fine performance. The unit includes an AM and FM section for
superb radio reception as well as provision for FM stereo, Two powerful, low dis-
tortion amplifiers provide ample power for pure fane quality.
INSTALLATION PROCEDURE
The following information is for your reference.
Connecting the Phonograph:
If your phonograph uses a magnetic type pickup connect the two shielded
connecting cables to the twin receptacles on the rear of the receiver marked
'PHONO LO", If your phonograph uses a ceramic or crystal type phono pickup,
connect the two connecting shielded wires to the receptacles labelled "PHONO HI".
2

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• .,._.,. I" •
Connecting the Tape Recorder: I' ~' b ,~:., I
A tape recorder may be connected TO the twin input recept~al'l:~ J'Ib-~lle~'rttUX"
on the rear panel of the receiver. If you wish to mJ;"kca recording, connect two
shielded leads between the two '1APE OUT receptacles OUt the inputs of your
tape machine. All program material passing t,btQu-gh'tM ~(~red-,;ec.J~ve,{will now be
fed into your tape machine, ~ I .,,_ I '
Ccnnec!ing the Spee:ker:
••
The speaker manufacturer usually ineludes the impedance rating of the
spea~e.r eUI~eron the rea!' of the magnet structure or 0~1 the speaker frame. Coqnc,;.:~
two Wires trom the rp'ht speaker to the COM and either 8 or ]6 ohm terminals
\"depep)..dingon the sr.caker rating) located on tbe CHAN. A speaker terminal
strip. S'milarly connect the left speaker to the COM and either 8 or 16 ohm
terminals on the CHAN. B strip. Be sure the wires are cleanly dressed and do
no; touch the other terminals on the speaker terminal strip.
Connecting the FM Antenna:
•
A48" piece of wire is usually sufficient antenna for the stereo receiver. This
wire should be connected to the "FM" receptacle on the ANTENNA terminal
strip. For-best results all outdoor FM or T.V. antenna should be used and should
be connected to the "FM" and "GND" terminals on the ANTENNA strip.
Conllectil1g the' AM Antenna:
In most installations an outdoor AM antenna is not required. However, if an
outdoor antenna is needed attach it to the "AM" terminal on the ANTENNA
terminal strip located on the rear panel.
Connecting the FM Stereo (Multiplex) Adapter:
The Model MX60 I FM stereo adapter enables you to listen to stereophonic
FM broadcasts with your receiver. Instructions for installing the adapter are fur-
nished with the adapter.
OPERATING PROCEDURE
Plug the AC line cord into any outlet furnishing 117 volts, 50 or 60 cycle AC
current. The line voltage may vary between 105 and 125 volts.
Your stereophonic receiver incorporates several irn portant operating controls
located on the front panel. Each control has a specific useful function whieh is
related to the other controls and a proper understanding of the operation of the
various controls will doubtless prove useful in organizing and clarifying tbem
for you.
Function Control:
Viewing the receiver from the front you will find the FUNCTION CONTROL
on the extreme left. This control has five positions and selects the desired type of
program material.
3

1. PHONO, This selects your ste-reo phonograph for o:peFation,
2, AUX, If,a television receiver or tape recorder is part of your installation
it-may be switched ill by selecting the "AUX" position. ,
3, AM, This POSHiOIl selects 'the AM tuner portien of, the receiver fot op~r4:::
)ion, 4, PM, This position selects the FM tuner
Rortion 'of the receiver for.operation.
5. PM STEREO .. Stereophonic FM br,Qatk'asts may be received' when the
F(JNCTI.ON CONTROL switch is set to "PM' STEREO", Reception of FM stereo
'broadcasts is J\€)ssible only if your receiver is e~rtlipped with the special FM stereo
adapter, Mo~rel.j,1X601.
"'Yi)!:t tune, 1'0£ an PM stereo broadcast in. the same manner as for conventional
FM, ):: ~urstereo te'€eiver will automatically transteT the stereo stgna~ through the
amplifiel's t(j''YOiil'' speakers. , ~'..
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lo.u(:!lt~s.s Control:
, _Tllis.__cc?ntrol~ets the relative volume _ltwel of all prQgra~ material. Rstatiag
1 the control cloc~w!o~, ,.,raise'S the listening level Of both chanrrels« simu1wne91;lsl.)1.
I • r
Bali:Jfice .ContreSl:'-
: T:b~na;ture Q"f stere:oph<imic rep,l'qducti0n is such that it requires two i4en(icaJ
chaiITItls. tGf atfain' 'fife higheit 'degree' of faitYinilness· and spatial llistribt1tion, Any
variatien in the efficiency of one: channel as ;coHlpared to the other will disturb
. tWs., u;er,lItionship, :As there may be slight differences between the two speakers,
tave heads, cartridge coils, etc" this: receiver includes a special control to Balance
, one channel against the other. S1:l:fficie~trange is c~vered by this control to permit
rebalancing of the overall syst.em even in extreme cases where unbalance exists
It must be. noted that Hie BALANCE control may be set anywhete within
its.;range of adjustment to attain system, balance,
Tone Controls:
Separate: bass and treble tone contrels are provided in 0rde..r to reaiize the full
range of toile. adjustment requited for maximum high fidelity listening, The con-
trols may ettlJ,er boost @T cut the bas.s and the. treble tones 01 the program sQurce,
The$e comrols are activated in all FUNCTION CONTROL positions and should
b'e' set in acc0rdahce with your oWn hearing preference, speaker characteristics
.and room acoustics.
Tuning Control:
'This contl!o) seleets the desired sta~iOf:l when the FUNCT!ON SELECTOR
is in the AM, FM or FM STEREO. position, . , '.
Power On/Off Switch:
Moving this slide switch t,o the right tums th~ recej.ver on.
Noise Filter Switch:
I:n the event of excessive high frequency -ph011ograph hiss 01' if excessive lIoise
i1) introduced while hstening to a ste.reo PM b.foacicast (whel) the MX60J PM
stereo is installed), turn the NOI'SE FILTER switch "ON",
For normal listening the' nIter should be. switched 01l
6

Mode Switch:
The MODE switch selects between stereophonic and monophonic operation.
When playing your stereo records, tapes and FM stereo tuner this switch must be
in the "STEREO" position. When playing monophonic records or tapes, this
switch should be in the "MONO" position.
MAINTENANCE AND REPAIR "
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Due to the conservative design and high quality componei.cs of diis.:.insttu-
ment, no routine maintenance other than yearly tube-checking is rcquired.jShould
trouble develop, however, only the most qualified service technician should. be
employed, as special equipment and training is reouired to properly service a
mgt. f.rlelilYunit.
FM ALIGNMENT
r'; i~lIGN
GENERATOR
I
'-,
SETTING FEED OUTPUT DIAL
ADiour __ I
FREQ MOD SIGNAL INDICATOR SmlNG
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-
SCOPE
,
ANT. AT IF
Ist, 2nd &
(
1.
I
tF 10.7 MC 60 CPS TERM. TEST PO!NT 90 MC
3rd FM IF MAX.
THRU 47K TRANS,
RESISTOR
SCOPE ADJUST PRIMARY iBOTTOM)
2.
RATIO 90MC 60 CPS SAME AT TAPE 90MC FOR MAX. GAIN AND
DETECTOR OUTPUT ADJUST SECONDARY (TOP)
JACK FOR SYMMETRY
AM ALIGNMENT
COUPLE
SIGNAL AC V·TVM 1st
& 2nd
LOOSELY 'ATTAPE
I. IF 455 KC 400 CPS BY LOOP OUTPUT 1600 KC AM IF MAX.
AROUNO JACK TRANS.
LOOPSTICK
2.
OSC 600 KC 400 CPS- - SAME SAME 600Ke ~SCSLUG MAX.
--
3. OSC 14Q0 KC 4Q0 CPS SAME SAME 1400 KC OSC MAX.
TRIMMER
4. REPEAT STEPS 2 & 3
5. RF 600 KC 4Q0 CPS SAME SAME 600 KC lOOPSTICK MAX.
RING
6. RF 1400 KC 400 CPS SAME SAME 1400 KC RFTRIMMER MAX.
7. REPEAT STEPS 5 & 6
TtiE TUNING CAPACITOR PLATES MUST
BE IN FULLY CLOSED POSITION (COUNTER
CLOCKWISE ROTATION OF SHAFT) BEFORE
ATTEII<P.,ING TO STRING DIAL CORD.
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Part Number
ES4425583
ESCo.M442.Q
HC3654915
ES4425555
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FT4425423
FT4425482
JE3423997
JE3163839
JE3163905
JE3163841
STCo.M~158
GL4185308
GTCo.M4152
G'fCo.M4153
GTQ503045
GL4425550
'0L4425549
lV4425498
P4425500
FMCo.tvI5439
ER4425467
RV4425426
RV4425428
RV4425424
JE3283790
JE3584255
PC2492902
PCCo.M3637
PC4425533
PC4425582
PC781599
P4425479
r.::125584
P4425585
523
PARTS REPLACEMENT LIST
List
Price
SLIDE SWITCH SPST SS26 . . ..
SLIDE SWITCH DPDT 8850 . ; .
PILo.T LIGHT So.CKET ..
SLIDE SWITCH SPOT SS36-1 . . . .
POWER TRANFORMER .
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OUTPUT TRANSFo.RMER .
ELECTRo.L TIIC Co.NDENSER .
ELECTRo.L YTIC Co.NDENSER . ..
ELECTRo.LYTIC Co.NDENSER ..
3:, ..
ELECTRo.L vrrc Co.NDENSER
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TIPJACK ; ~... .~G
AM o.SC. Co.IL .. .. . . . . . .65
Ist AM IF TRANS. . ,.... . . 1.30
2nd AM IF TRANS. " ,.... 1.40
FM IF TRANS. . L50
RATIO. DETECTOR TRANS. W/DIo.DES ., 4.85
ANTENNP>. Lo.OPSTICK . .. .. '2.40
VARI ABLE Co.NDENSER . . .., , 4.40
TUNING DIAL .. 2.50
FM FRo.NT END ,.... ., , , 20.20
FUNCTION SWITCH . . . . 2.05
BASS AND TREBLE Co.NTRo.L - TANDBM .., ,..... 1.75
BALANCE· Co.NTRo.L LOO
Lo.UDNESS Co.NTRo.L -TANDEM. 2.20
ELECTRo.L YTIC Co.NDENSER .50
ELECTROL YTIC Co.NDENSER . .40
PC PLATE, To.NE Co.NTRo.L . . .. .90
PC PLATE, RIA A EQUALIZER ,.... .50
PC PLATE, PHo.NO INPUT .. ". . .50
PC PLATE, Vo.LTAGE DIVIDER .90
PC51 ,...... .35
ESCUTCHEo.N ,... 7.50
KNo.B, PLASTlC TUNER '" .45
KNo.B. PLASTIC SMALL . . .. .40
LCR5579
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MODEL MX601
FM STEREO ~4DAPTER
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tNSTAllATION
:... The ~601 adapter installs easily into your stereophonic receiver without
thJ> o:e'ed, tor special tools or additional Wiring.
t. ·~ffhn,.re'moving the MX601 from its carton, insert the adapicr iuto the chassis
"') !)ljN.i:\1~rl.aponprovided, for it This indentatier- i,sIocarcd at the left re<tr of the:
, reGeIver with the front panel facing you. Proper orientation of the MX601
·'';:iY '1mat.pter is to line up the horizontal slot located at one end of the ;ld<!pter
b3:::)'~l,lt~~iswith the protruding metal leek on the receiver chassis. TJ1e Tear of the
adar.}'l.tf (this can be easily identified because art of the adapter cables. emerge
fron: ~;1issection) includes :'i small hole for a hex screw to fasten the adapter
i nto '" I. r- ",
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2~"'e>l1Cv inc adapter has ~),€cninstalled, inse-rt the pla~k pJ)wer take-off plug from
.'1 the MX601 into the female power socket on the receiver chassis .located
!)e'W,('orll the /408,outp.ut tube and the output transformer.
3.. Three ec5lored wires emerge from tl1C r:c(l~ of tI1e MX601 adapter. Tb'e 'green
wire eennects to the MX- OUTPUT receptacle on the rear of the receiver: The
white wire connects to the FM STEREO B rcccpfuck and the Blue wire to 'the,
FM STE.'REO A receptable.
OPERATION
, ,
The MX60.1 is'. a completely automatic device and if> aetiv,tted when the
FUNcrION SELECTOR switch Oil the front R(lflel of the receiver is ill the FM
STEREO position. Tune to the desired stereo EM station in the same manner as
for conventional PM.
When listening to a convenrional FM br.o(ldta~t; 0'e sure the FUN<tT'lON
SELECTOR switch is set to FM rather than to PM STEREO.
A WORD ABOUT YOUR FM ANTENNA
Since stereo FM requi res greater .,signal strength than oLCohnaq m(f)nopboni~,
reception, it is strongly recominended to use au outdoor .PM or TV antenna with
Your stereo receiver in order to obtain 0ptimtiID results. An ol!ltsicie antenna wjI]
also help eliminate ll1ultiBatn intede.renq:) which can re§(ul~in whi.st~s an~ 110ise
in your stereo PM system. '"
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4 - AL.LCAPACITORS WJTHOUl DECIMAL VALUES IN tltM',
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