ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No. DESCRIPTION OF CHANGE
L927TX_1.0.sch
POWER TX FOR P1 100V
Contact Engineer:
L927TX
7-Aug-2003
INITIALS
Printed:
1 1Sheet of
Notes:
Contact Tel: (01223) 203243Kevin Lamb
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB5 9PB
Waterbeach
ARCAM
A3
Transformer Specifica ion For 100V P1 transformer
Arcam Part Number L927TX
Material Safety Specification
1. Winding Wire to be Grade 2 (130C ra ing) to BS 60317-4 1995
2. Mylar Polyester Insulator 130C Rated
3. Potting Compound PC3502 E135297(M) or equivalent.
Mechanical Specification
1. Centre of transformer to be potted (as shown).
2. Primary windings connect to 6 way MOLEX connector 39-01-2065.
Secondary
windings connect to 10 way molex connector 39-01-2105. Use MOLEX pin
44476-3112.
MOLEX connectors have pin numbers indicated on them. Connectors to be
UL94V0 rated.
Note Molex UL94V0 receptacles may be long lead time items.
Equivalent Conexcon 6740 Series UL94V0 parts may be used.
6 Way receptacle 6740-1060
10 Way receptacle 6740-1100
3. Primary wires are enclosed in a common sleeve. Secondary wires are
enclosed in a common sleeve.
Use UL rated sleeving.
4. All wire lengths in mm. Lengths are +5.0, -0
5. Please adhere rubber insulating pad to bottom of transformer as shown.
Electrical Specification
1. Transformer to have dual 100V primaries to allow parallel opera ion for
100V input.
2. Transformer input voltage range
100V -15% +15% (85V to 115V)
3. Transformer to have 5 secondary windings as show in the adjacent
drawing.
4. Loaded DC voltages specified at 100V AC in (wi h transformer primaries
in parrallel)
5. Each secondary winding to have a full wave (4diode) bridge to produce a
single DC rail.
(AS shown in diagram)
6. Output Capacitance to be as specified per rail.
7. Output voltages to be as specified in table and as shown in diagram.
8. Note. Transformer to be used in a power amplifer. The specified load
currents on the high power rails (VP58V, VN58V) represent the effective
current drawn when the amplifier is loaded to full rated power (200W) into
an 8ohm load and operated continuously.
This load current is not typical of normal operation which is considered to be
1/8th of full rated power.
A.0Prototype ReleaseKAL03_E006
BROWN
WHITE
BLACK
BLUE
100Vac
100Vac
PRIMARIES
SECONDARIES
6 way MOLEX MFIT JNR
PR MARIES
78mm max
POTTING COMPOUND
Rubber insulating pad
8
9
4
3
2
1
10
5
RED
ORANGE
YELLOW
GREEN
BLUE
VIOLET
WHITE
GREY
12
5
3
46
10 way6 way
Pin outs of Molex connectors
As viewed looking down at the end
the wires enter the connector
1
3
4
6
120mm dia max
SCREEN WIRE
SECONDARIES
130mm
160mm
Connector Latch
Rubber insula ing pad to have
7mm minimum diameter hole through centre 6
7
BLACK
BROWN
SCREEN WIRE GREEN/YELLOW
12
7
3
68
45
10 9
Wires to exit from near top of TX
9
10
1
2
3
4
5
6
7
8
VP70V
VN70V
VP58V
VN58V
VP18V
6 Way Molex
10 Way Molex
1
2
3
4
5
6
BLUE
BROWN
BLACK
WHITE
RED
ORANGE
YELLOW
GREEN
BLUE
VIOLET
WHITE
GREY
BLACK
BROWN
200mm
10 way MOLEX MFIT JNR
90 degree
+
Cout
TEST CIRCUIT
+VOUT
AC IN
Voltage on Reservoir Capacitor
10mS
Vmin
GND
Voltage
Secondary
Peak Voltage
Capacitor
(Volt)
Min Voltage
Capacitor
Average
Capacitor
to simulate
Load Resistor
Load RL
(V r m.s.) (Ohm)(Volt) (Volt)
Voltage
RL see above table.
Secondary Winding Voltage and Current Specs
Vpk Vmin
Vpk
Vaverage
(ideal TX assumed)
Bridge Rectifier Vf diode = 1.1V per leg = 2.2V Total
Vf = 1.1V
per diode
Label
AC Winding
VP70V
VN70V
VP58V
VN58V
VP18V
Cout
Capacitor
1000
20,000
20,000
(uF)
1000
1000
Secondary
Winding r.m.s.
Current
(A r m.s.)
Load Current
2250
2250
175
50
50
Effec ive DC
(mA)
14.35
50 8
50 8
18.75
70.2
70.2
17.25
69.8
69.8
18.0
70.0
70.0
8.0
8.0
0.52
0.25
0.251400
25.6
25.6
1400
102.8
43.3Vac
14.35Vac
50.8Vac
43.3Vac
50.8Vac
40mm
50mm
7mm DIA HOLE
COUNTERBORE DIA 25mm
Such that wires do not obstruct lid
Note Lid is only 1mm above top
face of max height transformer
Lid
1mm
B.0Changed voltages as per L926TX, sleeving to be UL94-V0KAL03_E192
B.1'100V' text was '115/230V', 'UL rated sleeving' was 'UL94-V0'SLS03_E193
1 0Reduced VP58V, VN58V to 43.0VacKAL03_E240
43 0
43 0
58.8
58.8
57.8
57.8
58.3
58.3
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