ffi#
w ; '
?Y
D u a l O p e r a t i o n a lA m p l i f i e r T y p e A A 1 0 5 4 . 2
Amplifier
Mounting U n i t T y p e T X 1 0 5 5. 2
Issue
One
Date
May 1964
Mod. Ref .
SO
LA
:
10 5 4. 2 / 1 5
1055.2/15
RTRO
Manual
N,n,,,uction
The Solartron Electronic Group Ltd.
Victoria Road, Farnborough, Hants.
T e l e p h o n e :F a r n b o r o u g 3
h 0 0 0 . T e l e x : 8 5 4 5 S o l a r t r o nF n b r o . C a b l e s :S o l a r t r o nF a r n b o r o u g h .
A Member of the Schlumberger Group.
Printedin England
CONTENTS
a
Section
Page
1
Introduction and Data Summary
1
2
Principles of Opemtion and Brief Description
2
Installation and Operation
2
{ r
Circuit Description
4
5
Test Procedures
4
List of Components
8
3
:
%
ILLUSTRATIONS
Figure
1
PL1 Connections
3
2
Typical Chopper Waveform
5
3
DC Slope Measurement
7
APPENDICES
Appendix
A
DC Amplifier
Section 1
INTRODUCTION AND DATA SUMMARY
1.1
Introduction
T h e D u a I Op e ra ti o n a lAmp l i fi e r Type A A 1054.2 i s a' pl ug-i n' uni t compri si ng tw o
independentbut identical general purpose d.c. amplifiers.
Each amplifier may be used
separately for summing, integrating or inverting operations.
Overload indicators, 'set zero' controls and test point facilities for both amplifiers
are available on the unit front panel. The inputs, outputs and all power supply connections are
made on a 24-way plug at the rear of the unit.
The SolartronAmplifier Mounting Unit Type T)( 1055.2 has been designed to house
up to six Type AA 1054.2 units. Mating sockets for the amplifier plugs carry the power requirements and allow input and output terminations.
t.2
Data Summary
Each amplifier has the following electrical characteristics :
Output Range
-
* 100 vol ts
Output Current (max. )
-
5mA or 10mA into 10ko load
d. c. gain
-
)1
a. c. gain (100c/s)
-
>1 x104
a. c. gain (10c/s)
-
>4 x 104
Input Current
-
<10-10
Bandwidth (gain of 10)
-
{ lkc/s
Stability
-
The amplifier will remain stable with an output load of 10ko and 10,000pF, and an input
Ioad of 2?0pF on the summing junction with
lMn or capacitive feedback.
Power Requirements
-
+ 3 0 0v o l t s d . c .
x 10? without load
"rrrp".
- 300 vol ts d. c .
Stabilised
- 200 vol ts d. c .
6.3 vol ts a. c. at approxi mate d. c. bi as of
+25 volt, with respect to common rail.
9 . 5 v o l t s a . c . a t a p p r o x i m a t ed . c . b i a s o f
-100 vol t, w i th respect to common rai l .
Note: Solartron Power Supply Type AS 1104.2 has been designed to supply twelve
T y p e A A 1 0 5 4 . 2u n i t s - i . € . , t w e n t y - f o u ra m p l i f i e r s .
0 5 4. 2/7
-
Mechanical Details
TypeAA 1054.2
Dimensions
H ei ght:
? in.
width:
2.Bin. 7.1cm
Depth:
1 1 .5 i n . 2 9 . 2 c m
W ei ght:
3lbs.
1 ? .? 8 c m
(overall)
1 . 3 6K g .
AII units, sub-assemblies and parts a r e i n t e r c h a n g e a b l e .
-
M e c h a n i c a lD e ta i l s
Dimensions
Type TX 1055.2
H ei ght:
7 in.
width:
19in
Depth:
12.25in 31 cm
Weight:
7lbs.
1 ? .? B c m
4 8 . 2 6c m
3 . 1 8K g
S ecti on 2
PRINCIPLES OF OPERATION AND BRIEF DESCRIPTION
2.L
Principles of Operation
Se e S e c ti o n2 .1 o f Ap p e n d i x fA f .
2.2
Brief
Description
The Dual Operational Amplifier Type AA 1054. 2 is designed for rack mounting
in conjunction with Amplifier Mounting Unit Type TXL0b5.2.
Valves are located on the main printed circuit boards, and the chopper relays plug into
separate sub-assemblies sitting in light traps to shield the input
diode limiters.
The printed circuit boards are in turn fixed to the amplifier
unit of open construction.
(See Frontispiece)
chassis,
Note: Printed circuit boards 00P501/503 comprising
amplifier
the whole forming a
,A, are the
rearmost pair.
Section 3
INSTALLATION
3. 1
AND
OPERATION
Unit Connections
Plug 1 pin assignments for the Type AA 1054.2 DuaI operational
Amplifier are shown in
F ig' 1'
T h e h e a te r s u p p l y c o n n e c te dbei w eenpi ns g and 21 reeas
four val ves and must be co nnected on one side to a d. c. potential of +25 uo1tr, and
the heater supply connectedbetween pins 10
and22, fe e d i n g tw o v a l v e s , mu s t b e connected
on one si de to a d.c. potenti at of -100 vol ts.
2
WE
c22
C2l rr
O P.A,
IO PF
IOPF
t3 I I
SJA
sGx
t4
2
l5
3
t6
4
SG.B,
TPI.B, t7
5
TPI A,
t8
6
BLANK
t9
7
SG.A.
20
I
OVERLOAD A
HEATERS
2l
9
H E A T E R S 6 . 3 v(AT+ 2sv B|AS)
HEATERS
22
to
H E A T E R S 9 . 5 '/
- 200v
23
ll
cHASSIS
-
24
t2
+ 300v
CRA,
O P'8,
CR.B,
DLANK
s G'l
VERLOAD
.8,
300v
SJ'8,
(Ar- loov BlAs)
F i g .l - P L1 C onnecti ons
The above require'ments are met by the Solartron Type AS 1104.2 Power Supply Unit
ment ionedin S e c ti o n 1 .2 .
Plug and socket assignments for the Type TX 1055.2 Amplifier Mounting Unit are shown
in the circuit diagram at the end of the Manual - sockets SKl to SK6 providing connectors for six
Type AA1054.2 units, sockets SK? and SK8 being used for patching and plug PLl for the power
supply connections,
3.2
Operation
If not used in conjunction with the Type TX 1055.2 Amplifier
connections to the plug at the rear of the Type AA 1054.2 amplifier.
Mounting Unit,
make suitable
In either case patch as required and allow several minutes for the equipment to warm up.
Connect an oscilloscope at a sensitivity of about 100mV/cm to the amplifier test points marked
tAt and tBt and adjust the associated tset zerot
T. P.1. on the front panel in turn for amplifiers
potentiometers to give zero mean d. c. component in the observed waveform.
The provision of input and feedback components must be determined by the parameters of
the application in which the amplifiers are to be used. It is not advisable to operate the amplifiers unless some feedback component is incorporated,
C21 and C22 (see Fig.l) ensure high frequency stabilityunderall
within the specification (see Section 1.2 - Stability).
1.2/r
conditions of operation
S ecti on 4
CIRCI.IIT DESCRIPTIONS
4. 1
D u a l Op e ra ti o n a lA m p tifi er Type A A 10b4.z
Se e Se c ti o n 3 o f A p p e n di x ' A ' .
4. 2
Amp l i fi e r M o u n ti n g U n i t Type TX 105b.2
The Amplifier Mounting Unit Type TX 1055.2 accommodates six Dual Operational
A m plif i e rs T y p e AA 1 0 5 4 .2 a n d c a n be mountedi n a standard l g-i nch rack.
Each amplifier plug has a corresponding socket on the mounting unit - sockets SKl
to SK6. The h.t., heater, common rail, signal ground and chassis outlets from the sockets
are commoned and brought out to a connector PL1. C1 to C4 serve to decouple the h.t.
s upplie s a t PL 1 .
Output and summing junction outlets from each amplifier socket are taken to sockets
SKT and SKB respectively and the overload outlets are commonld and brought out to socket SKg.
Section 5
TEST PROCEDURES
5. 1
Equipment Required:
The following test equipment is required:
5.2
(a)
A s i g n a l g e n e r a t o rt o g i v e 0 . L c / s - 7 0 c / s a n d 1 0 0 c / s a t 1 0 v o l t s r . m . s .
€ . g . , S o l a rtro n C O 546.
(b)
A single beam oscilloscope with facilities for measuring between 1
millivolt
a n d 3 0 0 v o l ts o n both a.c. and d.c. ranges to an accuracy of.Zvo,..g-.; s"r "r t r on
CD 513
(c)
A 2}ka/volt mutti-range meter of accuracy better than SVofuII scale deflection
€.8., Avometer Model B.
(d)
P o w e r s u p p l i e so f + 3 0 0 , - 3 0 0 , - 2 0 0 v o l t d . c . a t b 0 m i l l i a m p s . 6 . 3
and g.b
v o l t a ' c . a t d .c . bi as potenti al s of approxi matel y + 25 anA -tOO vol t d.c.
r espect i v e l y , € . 9 . , S o l a r t r o nA S t l } 4 . Z .
(e )
T w i n a m p l i fi e r t est set as show n i n Fi g.b.
T e s t 1 - p o w e r Su p p l i e s
c o n n e c t+ 3 0 0v o r t d . c . , - 3 0 0 v o l t d . c . , - 2 0 0 v o r t d . c . a n d h e a t e r ( 6 . 3
vorta.c. and
9' 5 v olt a ' c ' ) s u p p l i e s to th e te rm i nal bl ock on the ampl i fi er test
set and pl ug the l ow freque ncy
signal generator into SKD. Set switches SWA to position 1, SwB
to position A, SwC to position 2,
swF to position 2 and swc to 'oFF'. Plug the amplifier into the 24-way
soct<eton the end of the
flying lead' Allow time for the unit to *a"* up and then check the
following voltages at the points
stipulated within the unit.
(a)
-300 (*10) volt d.c. betweenpin 24 of plug
l and chassis (pin 24 is negative)
u s i n g th e 2 0 k n /v ol t meter on the bOOvott a.c. range.
wl
5.3
( b)
+ 3 0 0 (* 1 0 ) v o l t d .c . b e tw eenpi n 12 of pl ug l and chassi s usi ng the 2Okn/vol t
me te r o n th e 5 0 0 v o l t d . c. range.
(c)
-2 0 0 (+ 1 0 )v o l t d .c . b e tw eenpi n 23 of pl ug l and chl ssi s (pi n 23 i s negati ve)
using the 2lka/volt meter on the 250 volt d. c. range.
( d)
6 .3 (* 0 .3 ) v o l t a .c . b e tw eenpi ns 9 and 2l of.pl ug 1 usi ng the 20ko/vol t meter
o n th e 1 0 v o l t a . c . ra n ge.
(e)
+25 volt d.c. approximately between pin I and chassis using the 20ko/volt meter
o n th e 1 0 0 v o l t d .c . ra n ge.
(f)
9 .5 (+ 0 .3 ) v o l t a .c . b e tw eenpi ns 10 and 22 of.pl ug 1 usi ng the 20ko/vol t meter
o n th e 1 0 v o l t a . c . ra n g e.
.(g)
-100 volt d.c. approximately betweenpin 10 and chassis using the 20kn/volt
m e te r o n th e 2 5 0 v o l t d . c. range.
Test 2 - Chopper Waveform and DC Offset.
(a)
With the test set connectedas in 5. 2, switch SWF to position 3, monitor the
test point, SKE, with the oscilloscope on the 1 volt,/cm. a. c. range. Check that
the chopper waveform is stable and set the chopper signal for zero d.c.
component by adjusting RV1 on the front panel of the amplif ier (See Fig. 2).
Fig.2 - Typical Chopper Waveform
(b)
With the test set connectedas in 5. 3 (a), switch SWF to position 4 and SWB to
position B. Repeat the procedure of 5.3 (a), adjusting RV2 on the front panel
of the amplifier to balance chopper signal. Amplitude l2 volt peak-to-peak.
(c)
With the test set connectedas in 5.3 (b) switch SWB to position A, SWC to
position 2 and SWF to position 3. Monitor the test point(SKC)with the 20ko,/volt
me te r o n th e 2 .5 v o l t d .c. range and adj ust R V 1 for zero readi ng. S w i tch S W F
to p o s i ti o n 2 a n d m o n i tor the d.c. off-set on 50pA range.
It s h o u l d n o t' e x c e e d 1 0 0 mi l l i vol t.
AVO model 8).
)4.2/r
(N ote: 50r.rA= 125mV f .s.d. on
(d)
With the test set connectedas in 5.3 (c), switch SWB to position B and
SWF to position 4. Adjust RV2 for zero reading. Switch SWF to position 2
a n d mo n i to r th e d .c . o ff-set on the 50pA range. It shoul d not exceed 100
mi l l i v o l t.
(e)
With conditions as for 5.3 (d) check with the oscilloscope that the chopper
w a v e fo rms a p p e a r o n T e st P oi nt 1 of ampl i fi er' A ' and Test poi nt 1 of
amplifier'B';
both points on the front panel of the amplifier. Remove the
Z}kn/volt meter f rom SKC.
5.4
Test 3 - Noise
(a )
(b)
5.5
Test 4 - Leakage
(a)
(b)
5.6
(e) sw i tch sw B to posi ti on A ' S W C to
w i th th e te s t s e t c onnectedas for 5.3
p o s i t i o n 6 a n d S w F t o p o s i t i o n 2 . w i t h t h e o s c i l l o s c o p e omeasure
n t h e l 0 0 the
millioscillating and
volt a. c. range, check that the output is not
amplitudeofthenoise.Itshouldnotbegreaterthan?Smillivoltpeak-toPeak.
(a) switch swB to position B' check
with the test set connectedas in 5.4
the amplitude of noise ' It
measure
that the output is not or"itt"ting and
peak-to-peak.
?5
millivolt
than
greater
should noiu"
(b), switch syB- to position A and
with the test set connectedas for 5. 4
ttr" 20kn/volt meter on the 50pA
press
conneci
swE.
?.
swc to position
the voltage on the meter
range to test point (sKct. ielease swE. Measure
100 millivolt'
exceed
not
should
It
SwE.
l0 seconds after releasing
(a) switch swB to position B and repeat
with the test set connectedas for 5. 5
the Procedure of 5 ' 5 (a) '
Test 5 - StabilitY.
(a)
(b)
(c)
(d)
(e)
(f)
connectedas for 5'5 (b)'
Remove the 20ko/volt meter. With the test set
swG to 'ON'' Monitor
and
8,
switch swB to position A, SWC to position
volt a ' c ' range and a{j99t
SKE or SKC with the oscitloscope on the 300
cycles.per second at sKE or
100
peak-to-peak,
volt
200
for
the oscillator
oscilloscope range
the
adjust
sKC. switch swF to position 1 and
accordingly.(Rangeroo*v/c'").NowpressandreleaseSw
Dandcheck
of oscillation' Repeat this
that the amplifier is stable and gives no iigtt
procedurefbrSwApositions2toSinclusive.
summing junction of the.
Note that by pressing and releasing swQ the
signal ground: this being
to
strorted
amplifier ,rrra"" test is temporaril!
amethodofstartingnon-linearoscillation.
(a), switch swB to position B and
with the test set connectedas for 5. 6
(a)
'
repeat the procedure outlined in 5 ' 6
(b), switch-SWB to position A' SWC
With the test set connectedas for 5.6
ihe oscillator to give 200 volt peak2.
position
to position 9 and SWF to
-!et
Now switch SWF to
to-peak, 100 cycle" p"i second, at SKE or SKC. (b).
5.6
given
in
the procedure
position 1 and
""p""f
(c) switch swB to position B and repeat
with the test set connectedas for 5. O
(c)
'
th e p ro c e d u re for 5.6
(d) switch swB to position A '
with the test set connectedas for 5 ' 6
Monitorthevoltag"onTestPoint2onthefrontpanelofamplifier-'A'
withtheoscilloscopeonthe300volta.c.range.Itshouldbenotlessthan
1 ? 5 v o l l P e a k -to-P eak'
(e) switch swB to position B '
with the test set connectedas f or 5 . 6
with the oscilloscope'
Monitor the voltagu on Test Point 2 of amplifier'81
Itshouldbenotlessthanl?Svoltpeak-to.peak.
5.7
T e s t 6 - Ov e rl o a d .
(a)
(f) switch swA to position 3' SWB to
with the test set connectedas for 5.6
Increase the drive of the oscillator
s.
pt"itio"
position A and swF to
the front panel of the amplifier
on
neon
indicating
the
LPl,
until lamp
point with the oscilloscope on the
test
ttt"
Iights. M"""ore the voltage it
volt peak-to-peak'
30 volt range. It should indicate not lesl than 5
(b)
5.8
5.9
With the test set connectedas in 5. ? (a), switch SWB to position B and SWF
to position 6; and with lamp LP2 lit, measure the test point voltage as in
5 .? ( a ) .
TestT-ACGain.
(a)
With the test set connectedas for 5.? (b), switch SW{ to position 1, SWB
to position A, SWC to position 5 and SWF to position 2. Set the oscillator
to give 200 volt peak-to-peak, 100 cycles per second at SKE or SKC and
measure with thb oscilloicope on the 300 volt a.c. range. Now switch SWF
to position 1 and measure the test point voltage on the 30 millivolt range of
the oscilloscope. It should be not greater than 20 millivolt peak-to-peak.
(b)
With conditions as for 5.8 (a), switch SWB to position B and measure again.
The test point voltage should not exceed 20 millivolt peak-to-peak.
(c)
With conditions as for 5.S (b) switch SWB to position A and SWF to position 2.
Decrease the frequency of the oscillator to 10 cycles per second and set it
to,give 200 volt peak-to-peak at SKE or SKC. Now switch SWF to position 1
and measure thetest point voltage on the 30 millivolt range of the oscilloscope,
It should be not greater than 5 millivolt peak-to-peak'
(d)
With conditions as for 5.8 (c) switch SWB to position B and re-measure.
test point voltage should not exceed 5 millivolt peak-to-peak.
TestB-DCGain.
(a)
With the test set connected as for 5. 8 (d) switch SWC to position 4 and SWF
to position ?. Monitor SKE or SKC with the oscilloscope on the 300 volt d.c.
range and drive the time-base of the oscilloscope with the oscillator output.
Set the oscillator to give 250 volt peak-to-peak, 0.1 of a cycle per second, at
SKE or SKC.
(b)
With the test set connected as for 5. 9 (a) switch SWF to position 2 and with the
o s c i l l o s c o p eo n th e 3 0 0 mi l ti vol t d.c. range, measure the d.c. sl ope of the
Iine ignoring the super-imposed a.c. noise. It should not exceed 50 millivolt,
as indicated in Fig. 3 .
Note that althougtr-SWBis switched to position B, the gain of amplifier'A' is
being measured.
(c)
With the test set connectedas for 5. I (b) switch SWB to position A and remeasure the d. c. slope. It should not exceed 50 millivolt.
Fig. 3.
54.2/r
The
DC Slope Measurement
LIST
OF
COMPONENTS
P r int e d C i rc u i t B o a rd As s e mb l y OOpbOl
See Appendix 'A'
P r int e d C i rc u i t Bo a rd As s e mb l y
O Opb03
RESISTORSVARIABLE
Description
Cir c u i t
Ref.
RV 1
RV I
(A m p ' A' ) W i re W o u n d
(Amp ' B' ) Wi re Wo u n d
Value
Ohms
Tol
7o
Rating
Watts
lK
10
1
Colvern CLR L2o6/gs/s
lK
10
1
C ol vern C LR L206/95 / S
Manufacturer and Type
CA PA CITOR.S
Cct.
Ref .
Value
pF
Tol.
* c6
.047
* c6
Rating
Volts
Manufacturer
10
4 00
Wima Tropyfol
M. Mpl
.041
10
400
Wima Tropyfol
M. Mpl
B30pF
2
500
S ufl ex
H .S . po.
B3 0 p F
2
500
S ufl ex
H . S . po.
.0033
10
4 00
Wima Tropyfol
F. Mpl
.0033
10
4 00
Wima Tropyfol
F. Mpl
ol
/o
& Type
AMP'AI
AMP IB'
AMP IA'
* c?
AMP
IBI
* CT
AMP 'A'
* c8
AMP 'BI
* cg
Circuit
Ref.
Cz t
C22
Description
P o l y s ty re n e T u b .In s .
Polystyrene Tub. Ins.
Value
pF
10pF
t0pF
ToI
+lpF
*lpF
Rating
Volt!
500
500
r
Manufacturer
and Type
G.E.C.
G.E.C.
MISCELLANEOUS
Cct.
Ref .
ILPl
ILPl
TP1
TP1
TP2
TP2
PLl
Description
Manufacturer & Type
!t-p l{l) t amp (without Resistor) Clear
l-amp (without Resistor) Clear
11*p ']flJ
A')
!Amp 'Br) So c k e t p re s s fi t Red
(Amp
Socket pressfit Red
(A*p 'A') Socket pressfit yeltow
(Amp 'B') Socket pressfit yellow
Plug Red (2 off)
) Supplied
with
Plug Yellow (2 off)
)
unit
Plug 24-Way
Arcolectric
A rcol ectri c
Sealectro
Sealectro
Sealectro
Sealectro
SLBO
SLSO
SKT.5O
SKT-50
SKT.50
SKT-50
Sealectro
FT-M-?
McMurdo
XRP24
+ On Printed Circuit
Board OOpbOl
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APPENDD('A'
D C A MP LIFIE R
used on
\4.2/l
AA 1054.2
Dual Operational Amplifier
AS 1102
+100V and -100V Reference Supply
TR 1322
Mark-Space Multiplier
TR 1323
Mark-Space Multiplier
Issue
:
One
D ate
:
January, 1964.
LIST
OF
CONTENTS
Section
1
INTRODUCTION AND DATA STJMMARY
1 .1
In tro d u cti on
1 .2
D a ta S u m marv
PRINCIPLES OF OPERATION AND
BRIEF DESCRIPTION
2.1
Principles of Operation
2 .2
B ri e f D e scri pti on
CIRCUIT DESCRIPTION AND OPERATION
3 .1
AC C h a nnel
3 .2
D C C h a nnel
3 .3
M i x e r Stage
3.4
Output Stage
3 .5
O p e ra ti o n
3.6
Overload Indication
LIST
OF
COMPONENTS
DIAGRAMS
Figure
10
1
Component Location
Printed Circuit Board OOpbOf
2
Component Location
Printed Circuit Board OOpbO3
3
Circuit Diagram
ooP501/503
Section 1
INTRODUCTION AND DATA SUMMARY
1. I
Introduction
The amplifier described in this Appendix is a standard d.c. amplifier as
used in the Dual Operational Amplifier Type AA1054.2 and incorporated in thi twin
(+ and -) 100 volt Reference Supply Type nSttOz, Mark/Space Mbdulator Type
TRl322
and Height Modulator Type TR1323.
t.2
Data Summary
Output Range
-
+ 100 vol ts
Output Current (Max. )
-
5mA,or 10mA into 10ko load
DC Gain
-
>1 x 10? without load
AC Gain 100c,/s
-
>1x104
-
>4 x 10'
l \c /s
Power Requirements
-
4
+ 300 vol ts d. c. )
)
-300 vol ts d.c. )
)
-200volts d.c. )
nomi nal stabi l i sed
6.3 vol ts a.c. at approxi mate d.c. bi as of + 2b vol t
with respect to common rail.
9.5 vol ts a.c. at approxi mate d.c. bi as of - 100 vol t
with respect to common rail.
Section 2
PRINCIPLES OF OPERATION AND BRIEF DESCRIPTION
2.L
Principles of Operation
An input signal applied to the summing junction is split and amplified through
two
channels - a high- frequency channel, capacity coupled; and a low frequency
channel via the
mechanical chopper.
The two channel outputs are added at the input of a mixer stage which, in
conjunction with the output stage, provides considerable gain.
Zerofrequency gain of the chopper channel is approximately 60db (i.e.
1000) and
the parallel high frequency channel-gain is anprgximltely 26-iu (i.e. zoi.
rtre gain of the mixer
a nd out put s t age s i s a p p ro x i m a te l y B 0 d b (i .t-10,000)
l o* frequenci es. A fter summati on of
the signals at the-mjxer stage, th9 overall gain and phase
" t of the amplifier is controlledby
int e r n a l f e e d b a c k( R 1 ? , R l B , R 1 9 ; R V 1 ; C g , - C g , C 1 g i .
This type of circuit configuration provides maximum low frequency gain
with minimum overall stability problems.
t'z/t
11
2.2
Brief DescriPtion
T he d .c . a mp l i fi e r c o mp ri s e s tw o pri nted ci rcui t boards OOP 501upon
which the valves and associated componentsare mounted, and OOP503 holding the chopper
relay and input resistors.
Harwin pin terminations on the boards provide for connecting power supplies and
Iinking to panel mounted components, - i.e. test points, overload indicator, adiustment potentiom et er .
Holes drilled in the boards to accommodate 4BA bolts facilitate mounting in the
respective equipments.
Section 3
CIRCUIT DESCRIPTION AND OPERATION
3.1
AC Channel
Signats at the input junction S. J. (pin 5) are a. c. coupled to triode VlA grid via
capacitor C1. Diode limiter MR5 and MR6 in parallel with the input clamps the signal at
approximately *0.6V to prevent the build- up of nonlinear lockout oscillations.
The amptified output from VlA anode is coupled to the control grid of pentode
V lB by C5. R 8 w i th C 6 a n d R 1 3 w i th C? are phase correcti on components.
3.2
DC Channel
Signals from the input junction
SJ (pin 5) are taken via R4,
R5 to one contact of
chopper relay RL1, the purpose of which is to alternately connect R4 to ground and leave i t
Thus a pulsed signal at triode V2A grid is produced, the
free at a frequency of 100c/s.
amplitude of which is proportional to that at the input.
The amplified signal at V2A anode is a. c. coupled by C13 to pentode V2B grid for
A second contact on RL1, coupled to V2B anode by R28-C16r synfurther amplification.
chronously rectifies the pulsed signal to provide d. c. restoration.
MR3 in series with R42 energises
3.3
'A' supply.
RL1 coil from the 6. 3 V heater
Mixer Stage
junction is applied to mixer pentode V1B grid via R11
The d.c. signal at C16-RLl
and controls the operational d. c. conditions at the anode.
V1B cathode potential is determinedby the setting of potentiometer
influences the d.c. levels of the following direct coupled output stage.
3. 4
RV1, and this
O u tp u t Sta g e
Triode-pentode V3A-V3B in cascode comprises an amplifier enabling considerable
gain to be achieved whilst being capable of delivering a reasonable output current.
R40, R41 and VT1 form a potential divider across the mixer output. VTl, in the
lower limb, has a high dynamic impedancebut a low d. c. volt drop. Thus a large d. c. volt drop
t2
wE./105/
a c r os s R40- R4 1 c a n b e a c h i e v e dw i th o u t s eri ous si gnal l oss, the si gnal at R 41-V Tl j uncti on
going to V3B grid.
Zenet diode MR4 \s a22 volt base clamp for VT1, while MRz prevents VT1 collector pot ent ial f r o m e x c e e d i n g2 5 v o l ts u n d e r sw i tch-on condi ti ons - i .€., shoul d h.t. be appl i ed
before V3B has warmed-up, to enable the cathode-grid diode action to function.
R34 is provided in series with a test point to prevent an accidental short circuit
occurring. V3A cathode is prevented from exceeding approximately 150V with respect to the
common rail by voltage dependentresistor R43.
3.5
Operation
On positive going signals current from the amplifier is taken from V3A cathode.
On negative going signals V3A virtually cuts off and current is taken from the anode of V3B.
When this current is such that the potential across R33 exceeds 18 volts , Zener diode MRl
conducts to allow the extra current to flow through RZ1.
3.6
Overload
Indication
The presence of an overload condition is detected by a neon indicator which strikes
when the output from the d. c. channel at the junction of c16 and RL1 reaches approximately
60 volts.
r.2/r
13
COMPONENTS LISTS
PRINTED CIRCUIT BOARD OOP5O1
RESISTOR,S
Cct.
Ref .
Description
R1
R2
R3
R?
R8
Not fitted
R e s. C o m p .G R 2 .In s .
R e s .C o m p . G R 2 . I n s .
R e s. C o m p .G R z . In s .
R e s .C o m p . G R z . I n s .
1M
100
100
200K
10
10
10
10
R9
R10
Rl1
Rl2
R13
Res. Comp. GR2. Ins .
R e s .C o m p .G R 2 . I n s .
R e s .C o m p . G R 2 . I n s .
R e s .C o m p .G R 2 . I n s .
R e s .C o m p . G R 2 . I n s .
680
2.7K
4 .? M
100
1 80K
10
10
10
10
Rl4
R15
Rl6
Rl?
R18
Res. Comp. GR2. Ins .
Res . Comp. GR2. Ins .
R e s .C o m p . G R 2 . I n s .
R e s .C o m p .G R 2 . I n s .
R e s .C o m p .G R 2 . I n s .
1 .8 K
110K
27K
1M
100
1
Rl9
R20
R21
R22
R23
R e s .C o m p . G R 2 . I n s .
R e s .C o m p . G R z . I n s "
R e s .C o m p . G R 2 . I n s .
Res. Comp. GR2. Ins .
R e s .C o m p . G R 2 . I n s .
5 6K
100
470
22K
220K
10
10
10
10
10
I
4
I
4
I
4
I
4
I
4
R24
R25
R26
P.27
R28
R e s. C o m p .G R z .In s .
R e s .C o m p . G R 2 . I n s .
R e s .C o m p . G R z . I n s .
R e s. C o mp .GR 2 .In s .
R e s .C o m p . G R 2 . I n s .
3. 9K
3 .3 M
100
l BOK
47K
10
10
10
10
10
I
4
t
R29
R30
R31
R32
R33
Res. Comp.GR2. Ins .
R e s .C o m p . G R z . I n s .
R e s .C o m p . G R 2 . I n s .
R e s . C o mp .GR 2 .In s .
R e s .C o m p . G R 2 . I n s .
2.2K
820K
5 6 0K
100
4.?K
10
10
5
10
10
R34
R35
R36
R3?
R38
R e s .C o m p .G R 2 . I n s .
R e s .C o m p .G R z . I n s .
R e s .W . W . V i t .
R e s .C o m p . G R 2 . I n s .
R e s .C o m p . G R 2 . I n s .
4 ?K
6.8K
4.7K
22K
330K
10
10
10
10
10
1
1
R39
R40
Res. Comp. GR2. Ins .
150K
Res. Film(Carbon)
GRl. Non.Ins.
1.lM
Res. Film(Carbon)
G R l . N o n .In s .
1.1M
R e s .C o m p . G R 2 . I n s .
t20
Vdltage Dependent Res.
10
1
2
1
R41
P"42
R43
L4
Value
Ohms
To1.
%
Rating
watts
I
4
I
1
I
4
I
4
I
4
I
1
I
4
I
4
n
t
7
1
0
1
0
1
0
1
2
10
+
l
i
0
1
I
4
I
4
I
4
I
4
I
1
I
4
I
I
1
l_
4
I
4
3
I
I
+
+
Manufacturer & Type
Dubilier
Dubilier
Dubilier
Dubilier
BTT
BTT
BTT
BTT
Dubilier
Dubilier
Dubilier
Dubilier
Welwyn Metox
BTT
BTT
BTT
BTT
F22
Dubilier
WeIwyn Metox
Dubilier
Dubilier
Dubilier
BTT
F22
BTT
BTT
BTT
Dubilier
Dubilier
Dubilier
Dubilier
Dubilier
BTT
BTT
BTT
BTT
BTT
Dubilier
Dubilier
Dubilier
Dubilier
Dubilier
BTT
BTT
BTT
BTT
BTT
Dubilier
Dubilier
Dubilier
Dubilier
D ubi l i er
BTT
BTT
BTT
BTT
BTT
Dubilier
Dubilier
Painton
Dubilier
Dubilier
BTT
BTT
P3064'
BTT
BTT
Dubilier
BTT
I
I
I
4
!
4
Welwyn
Welwyn
Dubilier
Mullard
c2l
c2L
BTT
E299DC/P346
WI
CAPACITORS
Cct.
Ref .
c1
e4
c5
c6
c1
c8
Description
Value
pF
Cap.M e t. Pl a s . T u b .In s
.1
Cap.El e c tro l y ti c
100
Cap.M e t. Pl a s . T u b .In s ' .2 2
Tol.
7o
Rating
Volts
10
L25
6
400
Wima Tropyfol 'M'
Wima Printlyt
Wima Tropyfol 'M'
10
400
6
500
350
400
Wima Tropyfol
Wima Printlyt
Suflex
Hunts
Wima Tropyfol
10
10
20
6
350
400
630
400
Wima
Hunts
Wima
Wima
Wima
10
6
400
Wima Printlyt
Wima Tropyfol
10
Manufacturer & Type
See Component List of Unit in which used.
Cg
C10
Cll
Clz
C 13
Cap.Me t. PIa s . T u b . In s . .0 4 7
Cap.E l e c tro l y ti c
100
Cap.P o l y s ty re n e
10pF
Cap.Electrolytic
2
Cap. Met. Foil . Tub . Ins . . 1
C14
C15
C16
CL?
C 18
Cap.E l e c tro l y ti c
Cap.E l e c tro l y ti c
C a p . M e t .F o i I . T u b . I n s .
Cap.Me t. Pa p .T u b .In s .
Cap. Met. Foil . Tub . Ins .
C19
C20
Cap. El e c tro l y ti c
Cap.M e t. T u b .In s .
100
2
.041
.01
1000pF
100
0. 1
10
*1pF
'M'
H.S.
MEW118T
'M'
Printlyt
MEW118T
Tropyfol 'M'
Tropyfol 'F'
Tropyfol 'F'
'M'
VALVES
Cc t .
Ref .
Description
Manufacturer & Type
Vl
V2
V3
Valve
Valve
Valve
Mullard/Brimar
Mullard/Brimar
Mullard/Brimar
ECF82 or 6U8
ECF82 or 6U8
PCF82 or 9U8
SEMICONDUCTORS
i4.2/t
Cct.
Ref .
Description
Manufacturer & Type
VT1
Transistor
Texas Instruments 25?01
Jermyn Ind. Type TO.5
MRI.
Silicon Zener Diode
MR2
MR3
MR4
Diode
Diode
Silicon Zener Diode
International
Rectif iers
A .E .I.
A.E.I.
International
Rectif iers
ls[E.ZL8Tl0
N[S1H
N[S1H
MEZ22TL0
15
COMPONE{TS LISTS
PRINTED CIRCUIT BOARD OOP5O3
RESISTOR.S
Cct.
Ref .
R4
R5
R6
Description
Res . Comp. GR2.Ins .
R e s . C o m p .G R 2 .In s .
R e s .C o m p . G R 2 . I n s .
Value
Ohms
z.'tM
4?0K
10M
Tol.
7o
10
10
Rating
Watts
I
4
r
10
t4
Rating
Volts
Manufacturer & Type
Dubilier
Dubilier
Dubilier
BTT
BTT
BTT
CAPACITORS
Cct.
Ref .
Description
Value
pF
Tol.
%
CZ
C3
Ca p .M e t. T u b . In s .
Ca p .M e t. T u b .In s .
.041
0. 1
20
10
L25
tLl
l\flanufacturer & Type
Wima Tropyfol
Wima fropytot
,M,
,Mr
SEMICONDUCTORS
Cct.
Ref .
Description
MRb
MR6
Diode
Diode
Manufacturer & Type
Mullard
Mullard
OAZO?
OAZO?
MISCELLANEOUS
Cct.
Ref .
RL1
Description
Rating
IVlanufacturer & Type
Relay Sync. Chopper
plus Chopper Top Cap.
100cls
6 .3 V
A.E.I.
cK4
16
wE/Lol
,
)
c
2
0
t
7
t
2
+o6;o
t
o
2
[j
o
2
2
l
t
l
fh"nl
E==-Nffi
il
L _ tL - ' | ; ( v , ) i l l : C
Er
r:rtr,|
.EJilhtff
E ( ",)% l.,luEE+l
ore
o16
r y ;+.l b
H
a-)
[J
l--l r_rr-_:__rlrrl
\./
\
/
n'|-rl'ln)=;
l'''lllil g-
O z a
Lil.iEbIEO
E
:rT,st l'''I
t i r-"__l
r'--'
o23
o27
I
l
f-.r.-
ora
Qe
H
l--T;-l
eH-48,ffi
Fig.1 - component Location : printed circuit
O r o
Ji,'14
ors
o'7
B,qard oopSol
N O T E: D t o D E S M R5 , M R 6 M O U N T E D
O N C O p p E R S fD E
OF BOARD.
wE/ro54.2/r
Fig.2 - componentLocation: printed circuit Board oopbO3
AP PE N D X
B
T e c h n i c a l M a n u al : A S 1403pow er S uppl y U ni t
/1
Appendix B
A S 1403 P OW E R S U P P LY
T h e A S1 4 0 3P o w e r S u p p l y c o m pri ses an A S 1Lo4.2 P ow er S uppl yandamai ns suppl y
sw it ching
and distribution circuit.
SA and SB are, respectively, the HEATER ON and HT ON switches .
Sockets SKTA, SKTB, SKTC and SKTD route mains power to pins p and R, plugs pLA
on a maxim um of fo u r T u to rs . S o c k e t SK T E l i nks w i th pl ug pt 1 on th; A S 1104.2 pow ei S uppty.
LIST OF COMPONENTS
Cct.
Ref .
Description
SA
SB
SKTA
SKTB
SKTC
Switch Toggle DP
Switch Toggle DP
Socket 3 Way
Socket 3 Way
Socket 3 Way
SKTD
SKTE
Socket 3 Way
Socket 6 Way
AS1104.2
Power Supply (SeeAppendix B)
Solartron
P art N o.
c/o,6A
c/o,6A
Manufacturer and Type
3 ? 6 00 0 0 8 0
3 ? 6 00 0 0 8 0
3 5 1 50 3 0 4 0
3 5 1 50 3 0 4 0
3 5 1 50 3 0 4 0
Painton
Painton
Bulgin
BuIgin
Bulgin
501085
501085
sA2026
sA2026
sA2026
3 5 1 50 3 0 4 0
3 5 1 40 6 0 1 0
Bulgin
P l essey
sA2026
cz490L7
J
&
F
f
tlJ
z
lu
F
:(
t/,
o
F
:l
tt
J
o-
()
f
o-
t
t/1,
F
d)
F
F
.t
Hf A n
v
H
e r Z j
l
,t
l
*
.t,
r
,n
G
l
O
ppP?
t z H6
CIRCIIIT DIAGRAM : AS1403 POWER SUPPLY LTNIT
B.B/1351/r