Service Manuals, User Guides, Schematic Diagrams or docs for : . Rare and Ancient Equipment Kikusui kikusui_orc_27a
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1U SPECIFICATIONS
Type - Wien Bridge RC Oscillator
Power Rcqui::ement 24C -y, 50,/6OH:- Approx, 3ovA
Dimer;sions J O O ( W ) 1 ' 7 0 ( U ): ; 1 5 3 ( D ) m m
r
( Ma r" ) toOiw)x 1s0( u)x 110( D)
mm
Worght Approx. 5kg
Vacuum Tube 5AV6 1
6AR5 2
1zAT 7 1
6){4 4
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:a'
:1
Accessones Operation I\4anual
Test Data 1
Frcquency Rangc xl 18 - 2OOHz
x 1O 1 B O- 2 O O O H z
x 1OO 1 800 - 20000Hi
x 1k 18 - 200kHz
Calibration Accuracv From 18tlz to loOkl{z ! (2% + 1 t{z )
,
f'requency regulation For AC -?.40_V, t 5%t Less than * 1%
Frequency response Sine : Less than j O,5 dB ( reference : l kHz )
Square : Less than i 0,5 dB
( referencc : 1 kHz ) up to 2Okllz
Maximum Output Sine : more ttran 5 V rms
Squa.re ; more than 10 Vp-p
Complex : morc than 1OVp-p
' D i s t o r t i o n o - fS i n c W a v c l , c s s t h a n 1f , a t 1 k l 1 z
, /
. Sag or Overshoot of Sqare Wave
7 Lcss
Lo=" than 1 clB
Complex Wave Basc line frequency
Superposed Wave lBHz - ?OOkHz
Amplitude Ratio Approx, {;1
Output Impedance Less tiran 3 kil
-A -
2o FLTNCTION OI"CTONTROLs AND TERIutNALb
oRc,27A
OSCILLATOR
Por,r'cr srvitch
I
OutJrut tcrminals
/\
Frccluencl- control -2 u'aveform
I"requenc, Auo Output L'eve.I
R c m o v c t h i s p a n e l for replacement
of thc:rmi stcr
r
q
-3" OPERATION
.}"1
INI'IIAL PROCIIDURII
Conrrect tire porver ca=irlcto a po.,\er line of thb snecifietl voltagc ancl
frcquettc','" Turn the pol,er sn'.tch to ON., '1'hc lamp of dial illumination
u'ill light and tirc irrstrument will opcratc aftcr a fe:w minutes warm
-up" It will ber w-itliin specifications after 3O minutcs.
3.2 I RIiQUIINCI
Se:t tlto RANGE and li'RFjQUIINCY cor.rtrols for thc clcsired frequcrrcl,-"
Thc frequencv di:rl scal"e must be multpliccl i:-v thc multipll-ing factor
indicated b5' the RANGtr sn,itch setting to obtain the oscillatorfrequencyc
llxAtvIPLE: 1oo ( on clial scale ) x 1o (multiplS,ing factor indicated bI
RANGIT :IWITCH settilir ) : t tUz
When the rot:rr-v s'.vitch r'^,irichsclccts WAVEFORIyi is sct in the position
of CON4PLEX, thc r.a.luc ol.,taincd above is tlic frccllrency of superpaseC
wave , lvhilc- the base frcquency is constant ( .= linc frequency ) at any
position of the RANGIT and FREQUtrNCY controls settingo
}"3 OUTPUT TER\4INALS
The unbalanced output is ol-.,tained from the potcntiomctcr connectecl
betrry-ecn the cathode of the cathocie follor,ver 'Ihc
and ground . I'alue of
thc output impedancc valics nearly frorn zr:ro to 3 kQ according to ilre
position of the output control , beirrg maximum near its center positiol
'
The load resistance higher than 1O ke is desirecl to avoicl the increase
of distortion in or.rtput r,vaveformo
The lorver value of resistancb may be uscd at the lorner voltage of the
output without thc increase of distortion"
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r+:,.
-6-
4O OPERATING CONSIDERATION
e: 4.1 CHANGtr IN OUTPUT CAI*ISED ElY LINE] VOLTAGE VARIATION
r
The example of chanp ir' ,
+4
the frequency of oscill:rtion- 2
f:taooHz Ll
and the output voltage is slioun o
t
rq
2
()
in Fig" 1,
-4 as
-6
-a
Frequency L.NE YOLTA&E (o/o)
Output Voltage
Fig" 1 l-
4"2 FREQUENCY RESPONStr
. Frequency r e s p o n s e o f sine and square warre output are show'n in Figo 2 .
Load resistance oO 70pF ehuhted
!t
lOkQ TOpF shunted
a
t
k
:
l*
s
tr
F
o
too 3fi
FREQ (Hz)
Fig'
t
4"3 SQUARE WAVE
Square wave in this instrument is sha.ped from sine wave through the
clipper circuito The faster rise time is obtained nearly propbrtional
to frequencyo However, the quality of the waveform becomes poor
because of the upper frequency limit of the circuitso
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*7*
\iAINTT.\AN('I].
.'"
The instrumcnt $,-as thorouglill tcsted ancl insp<,'cted bcforc [eing ship-
pcrl , but in thc casc of dcfocl, refor to tirc follouing dc:scr:i1;tions and
thc t1-pical f)C voltage r.,,rittr:n in thc cirer.rit cliagrarn"
O],' CA:;tr
5.1 RtrMO\,'AI-,
To removc tjrc ca,sc, r:'emove fivc: scr()ws on tlic top elnd l-rottom of fho
front pancl slrorvn in Fig, 3 , a n d sliclc thc,.case to tl-re rcar arrtl off tlier
instrumonto It is lrecommcnclecl to pu11 off tlrc pou'cr cablc fr:om the linc
c1 ring
u above proce-.clul'e,
cre\\
)CTCW
Top vicw Bottom view
I'ig" 3
5. 2 RtrPI,ACEN4ENT Otr TI{ERMIS'I'OR
Tho-rmistor of this instrumorrt is easily rc;rlaced by removing tl.c srnall
square panel on thc re'ar of thc czrsc,
5 3 I'RtrQUtrN(-)YCAI,IBRATION
"
I
Tire resistors and turring ca.pacltor of the frequc-.ncy cletcrmining netrnork
in thc instr:umcut are sck:ctcd accor: x
ial\
l' 6N
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