Silk Power Transformerfor Audio Cuircuit Builder
 
Open frame U-Bracket
Square open frame
(with External shield option)
Open frame Industrial Connector (7)
(with External shield option)
Black End Belt cover
Enclose casing
 

- High Grade Annealed Silicon Steel
- Low Loss Copper Wire
- "Perfect Layer Wound" we special wind power transformer using coated kraft paper and mylar insulation in every layer of winding to ensure long service life and quiet operation
- Primary and secondary are insulated with very high strength mylar insulation to prevent shorting
- Each copper wire termination will be reinforced with high insulating tubing
- Vacuum impregnation with high quality (non solvent added) vanishing agent
- All transformers are 100% test before completion
- Any other specific primary line voltage could be arranged to precisely generate exact secondary voltage you want.
- Custom Winding Available. eg. super low flux leakage transformer for sensitive phono stage circuit. If you do not see what you want, please send email to us at info@sacthailand.com

  
 
  Silk Custom Power Transformer cost estimation
 
  VA is the total value of output voltage x current of all secondary coils. For example; 300-0-300V @ 150mA equivalent to 90VA. 0-6.3-10V @ 4A equivalent to 40VA
 
VA
Base Cost
(THB)
Standard Secondary Terminal
Additional
Terminal
(THB)
Max Secondary Terminal
Standard (1) (2) (3)
Single Coil Spec
Shield
Finishing Option
Black End Belt cover
Fly lead STD (6
+(THB) )
Enclose casing (5)
Voltage (Volt)
Current (Amp)
Electrostatic +(THB)
External
+ (THB)
Fly lead STD (6)
+(THB)
Soldering Tag
+(THB)
<=25
450
3
N/A
3
100
1
x
50
x
x
x
26-50
900
5
100
8
200
1
x
75
50
400
x
51-75
1,275
6
200
8
200
1
x
100
50
400
x
76-100
1,600
8
200
10
400
2
x
125
100
650
800
101-125
2,000
8
200
12
600
2
350
150
100
650
1,000
126-150
2,300
8
200
12
600
3
350
200
100
650
1,000
151-175
2,600
8
200
14
800
3
500
250
100
850
1,200

176-200
3,000
10
150
14
800
3
500
300
100
850
1,200
201-225
3,400
10
150
16
800
3
800
300
150
850
1,500
226-250
3,750
10
150
16
800
3
800
300
150
850
1,500
251-275
3,850
10
150
16
800
4
1,000
300
200
850
1,500
276-300
4,200
10
150
18
1,000
4
1,000
450
200
850
1,500
301-325
4,550
12
150
18
1,000
5
1,000
450
200
850
1,500
326-350
4,900
12
150
18
1,000
5
1,000
500
200
850
1,500
351-375
5,250
12
150
20
1,000
5
1,200
500
200
850
1,500
376-400
5,600
12
150
20
1,000
5
1,200
500
200
850
1,500
401-425
5,950
12
150
20
1,200
5
1,200
500
200
1,200
2,000
426-450
6,300
12
150
20
1,200
5
1,200
500
200
1,200
2,000
451-475
6,650
12
150
20
1,200
5
1,500
500
200
1,200
2,000
476-500
7,000
12
150
20
1,200
5
1,500
500
200
1,200
2,000
>500
Please Contact
 
  (1). Over standard per coil Cost/Voltage = add 10 THB
(2). Over standard per coil Cost/1,000 mA Current = add 100 THB
(3). More than one High Voltage coils (30% voltage of standard single voltage coil) add 10% to the total cost for each of such coil
(4). Base cost is for U-brancket or Square Open Frame finishing, STD fly lead outs
(5). Enclose Casing can be fitted with additional mumetal shielding for 500 THB
(6). Silver Plated/Teflon fly lead option is available at additional cost
(7). Industrial connector option is available at additional cost 		 
 
  Silk Power Transformer Popular Models
 
Model
S1
S2
S3
S4
S5
S6
Recommend Circuit
Price
Type#1/#2
Price
Type#3
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
PWRT-1
400-0-400V
250mA
5V
3A
6.3V
3A
5V
3A
5V
3A
X
X
300B SE stereo
6,500
7,500
PWRT-2
300-0-300V
250mA
5V
3A
6.3V
3A
2.5V
3A
2.5V
3A
X
X
45, 2A3 SE stereo
5,500
6,500
PWRT-3
400-300-0-300-400V
250mA
5V
3A
6.3V
3A
2.5-0-2.5V
3A
2.5-0-2.5V
3A
X
X
300B or 2A3 SE stereo
7,000
8,000
PWRT-4
0-300-440V
450mA
70V
50mA
12.6V
2A
12.6V
2A
12.6V
2A
X
X
EL-34, 6550, KT-88 PP stereo
6,000
7,000
PWRT-5
220-180-0-180-220V
150mA
5V
3A
0-6.3-10V
3A
X
X
X
X
X
X
6SN7, 5687, 12AX7, 12AU7 pre-amp
4,500
5,500
PWRT-6
0-740V
220mA
150-0-150V
60mA
10V
5A
6.3V
2A
6.3V
2A
5V
3A
211/845 mono
8,000
X
PWRT-7
0-840V
250mA
300-0-300V
80mA
20V
4A
6.3V
2A
5V
3A
100V
50mA
GM-70 mono
8,500
X
PWRT-8
0-140V
1000mA
320V
100mA
12.6V
4A
12.6V
4A
6.3V
3A
X
X
6C33C-B stereo
6,500
X
PWRT-9
280-0-280V
200mA
5V
3A
6.3V
4A
6.3V
2A
X
X
X
X
6BQ5, EL-84, 6V6, 6F6 SE stereo
4,500
X
PWRT-10
320-0-320V
250mA
5V
3A
6.3V
4A
6.3V
2A
X
X
X
X
EL-34, 6550, KT-88 SE stereo
5,000
X

***Primary Type#1: 110-120 V @ 50-60 Hz
***Primary Type#2: 220-240V @ 50-60Hz
***Primary Type#3: 110V or 220V@50-60Hz can be selected by re-wiring the primary coils by user

*- Size: 9 cm x 10 cm x 11.5 cm_Weight: 3-3.5 kg for PWRT-5, PWRT-9
*- Size: 11 cm x 13 cm x 11.5 cm_Weight: 6-8 kg for PWRT-1, PWRT-2, PWRT-3, PWRT-4, PWRT-8, PWRT-10
*- Size: 13 cm x 15 cm x 16 cm_Weight: up to 10 kg for PWRT-6, PWRT-7