SAC Thailand
Silk Output Transformer
 
Single Ended Output Transformer with "SILK Wounding" Technique
 
  We are proundly present the best quality Hand-wound Output transformer with SILK Winding technology. The following product lists are just examples of our best seller products. We do accept Custom winding to meet special requirement as well as OEM.
Our new Single-ended Output Transformer can be characterised by having very wide bandwidth and smooth frequency response, low insertion loss, low phase shift, low distortion at high and low frequency, very constant impedance throughout its frequency band, precision air-gapped (adjusted under FFT analysis), and newest development of Genius Muliple Secondary (0-4-8 ohm or 0-8-16 ohm) that has equal sounding quality to both taps. Since we do not usually stock all transformers, actually most are made to order, so our latest development and technique will be used to produce the best transformer and the specification is usually surpass the one published below. 		 
 

E Series 500V Rating 2X current handling capability
Secondary Impedance: 0-4-8 ohm Rated Output Power:12W
Size: 6.5 cm x 7 cm x 9.5 cm
Model
Primary Coil
Inductance at 20Hz
Frequency Response (-3.0dB)Source Impedance = 0.7X
Weight
(kg./ea)

Recommended Circuit
Price (pair)
THB
Impedance
UL tap
Norminal DC current (max)
S-101
1.0K
n/a
150mA (300mA
4.5H
20Hz - 100KHz
1.6
6AS7, 12B4A
5,000
S-105
1.5K
n/a
120mA (240mA)
6.5H
25Hz - 100KHz
1.6
2A3, 6B4G paralleled
5,000
S-205
2.5K
n/a
60mA (120mA)
12.0H
25Hz - 90KHz
1.6
2A3, 6B4G, 300B
5,500
S-303
3.0K
44%
76mA (150mA)
14.5H
25Hz - 90KHz
1.6
PX-25, 6V6, 6F6
5,500
S-305
3.5K
44%
70mA (140mA)
15.5H
25Hz - 80KHz
1.6
6CA7, 6L6, 807, 7591
5,500
S-502
5.0K
n/a
60mA (120mA)
18.0H
30Hz - 80KHz
1.6
45, 71A, VT-52, 6BL7, 6BQ5, 6BX7
6,000
S-505
6.6K
44%
60mA (120mA)
20.0H
30Hz - 70KHz
1.6
EL-84, 6BM8, EL-34, KT-66
6,000

F Series 750V Rating 2X+ current handling capability
Secondary Impedance: 0-4-8 ohm Rated Output Power:20W
Size : 9.5 cm x 11 cm x 9.5 cm
Model
Primary Coil
Inductance at 20Hz
Frequency Response (-3.0dB)Source Impedance = 0.7X
Weight
(kg./ea)
Recommended Circuit
Price (pair)
THB
Impedance
UL tap
Norminal DC current (max)
S-6-6C33F
600R
n/a
250mA (500mA)
7.0H
18Hz - 150KHz
3
6C33C-B
9,500
S-1-6C33F
1.0K
n/a
250mA (500mA)
9.0H
15Hz - 125KHz
3
6C33C-B, 6336A
9,500
S-125F
1.25K
n/a
160mA (320mA)
12.0H
15Hz - 150KHz
3
300B Paralleled
9,500
S-220F
2.0K
44%
140mA (280mA)
15.0H
20Hz - 115KHz
3
EL-34, 6550, KT-88 Paralleled
9,500
S-250F
2.5K
44%
90mA (250mA)
16.0H
13Hz - 155KHz
3.2
AD1, 2A3, 300B, KT-88(T)
9,500
S-325F
3.0K
44%
90mA (250mA)
18.0H
13Hz - 155KHz
3.2
PX-25, 2A3, 300B, 6550(T)
10,000
S-330F
3.5K
44%
90mA (250mA)
20.0H
13Hz - 145KHz
3.2
KT-90, KT99, KT-100
10,000
S-525F
5.0K
44%
90mA (250mA)
25.0H
20Hz - 120KHz
3.2
6550, KT-88, 50, 572, 811, 845
10,000
S-660F
6.6K
44%
90mA (180mA)
35.0H
20Hz - 95KHz
3.2
EL-34, KT-66, 6L6
10,000
S-825F
8.0K
n/a
80mA (160mA)
40.0H
25Hz - 80KHz
3.2
801A, VT-62
10,000
S-110F
10.0K
n/a
60mA (120mA)
50.0H
25Hz - 65KHz
3.5
211
12,000

A Series 1,000V Rating 3X+ current handling capability
Secondary Impedance: 0-4-8 ohm Rated Output Power:30W
Size : 11 cm x 13 cm x 11.5 cm
Model
Primary Coil
Inductance at 20Hz
Frequency Response (-3.0dB)Source Impedance = 0.7X
Weight
(kg./ea)
Recommended Circuit
Price (pair)
THB
Impedance
UL tap
Norminal DC current (max)
S-1000A
1.0K
n/a
250mA (500mA)
13.0H
12Hz - 100KHz
5
6C33C-B, 6080
14,500
S-1500A
1.5K
n/a
220mA (440mA)
15.0H
10Hz - 100KHz
5
300B Paralleled
14,500
S-2000A
2.0K
n/a
180mA (360mA)
18.0H
10Hz - 100KHz
5
EL-34, 6550, KT-88 Paralleled
14,500
S-2500A
2.5K
n/a
120mA (300mA)
20.0H
12Hz - 145KHz
5.5
100TH, 2A3, 300B
15,500
S-3500A
3.5K
44%
100mA (300mA)
23.0H
12Hz - 145KHz
5.5
PX-25
15,500
S-5000A
5.0K
44%
100mA (300mA)
30.0H
12Hz - 120KHz
5.5
845
15,500
S-6000A
6.6K
44%
100mA (300mA)
35.0H
15Hz - 85KHz
5.5
GM-70, 805
15,500
S-10000A
10.0K
n/a
90mA (300mA)
60.0H
15Hz - 60KHz
5.5
211
17,000

X Series 1,200V Rating 4X+ current handling capability
Secondary Impedance: 0-4-8 ohm Rated Output Power: 40W
Size : 13 cm x 15 cm x 16 cm
Model
Primary Coil
Inductance at 20Hz
Frequency Response (-3.0dB)Source Impedance = 0.7X
Weight
(kg./ea)
Recommended Circuit
Price (pair)
THB
Impedance
UL tap
Norminal DC current (max)
S-3X
3.0K
n/a
160mA (+400mA)
35.0H
10Hz - 100KHz
7
845, GM-70 Paralleled
22,000
S-5X
5.0K
n/a
150mA (+400mA)
45.0H
10Hz - 85KHz
7
211 Paralleled, GM-70
25,000
S-10X
10.0K
n/a
100mA (+400mA)
70.0H
10Hz - 60KHz
7
805, 211, 845
28,000



Push-Pull Output Transformer with "SILK Wounding" Technique
 
  The newest development of SILK Push-Pull Output Transformer is the Symmetrical Winding Technique which maximizes the balanced magnetic coupling in both push-pull coils. This new winding scheme offers very close DCR tolerance between middel tap to both end taps which will enable circuit designer and tube amp builder to create a tube amplifier achieving super low distortion, and easier bias adjustment in a very predictable way. With Symmetrical Winding Technique, circuit performance can be optimized ahead of time even during the design process which eliminate the need for complex fine tuning/testing process upon commencing the circuit. Moreover, we implement our new Genius Multiple Secondary Technology (0-4-8 ohm or 0-8-16 ohm) to all of the new SILK Push-Pull Output transformers. This will give both secondary taps to process the same specification. Custom design and OEM for push-pull output transformer are also accepted.  

E Series 500V Rating
Secondary Impedance: 0-4-8 ohm Rated Output Power: 15W
Size : 6.5 cm x 7 cm x 9.5 cm
Model
Primary Coil
Inductance at 20Hz
Frequency Response (-3.0dB)Source Impedance = 0.7X
Weight
(kg./ea)
Recommended Circuit
Price (pair)
THB
Impedance
UL tap
Norminal DC current (max)
P-30-15A
3.0K
n/a
60mA (90mA)
80H
15Hz - 70KHz
1.6
2A3, 6B4G
5,500
P-50-15A
5.0K
44%
60mA (90mA)
100H
18Hz - 70KHz
1.6
45, 71A
6,000
P-60-15A
6.6K
44%
55mA (80mA)
120H
20Hz - 70KHz
1.6
6BQ5, 6BM8
6,500
P-10-15A
10.0K
44%
55mA (80mA)
150H
20Hz - 60KHz
1.6
6F6, 6V6
6,500

R Series 750V Rating
Secondary Impedance: 0-4-8 ohm Rated Output Power: 40W
Size : 9.5 cm x 11 cm x9.5 cm
Model
Primary Coil
Inductance at 20Hz
Frequency Response (-3.0dB)Source Impedance = 0.7X
Weight
(kg./ea)
Recommended Circuit
Price (pair)
THB
Impedance
UL tap
Norminal DC current (max)
P-510R
1.0K
n/a
120mA (240mA)
60H
5Hz - 120KHz
3
6AS7, 12B4
10,000
P-520R
2.0K
n/a
120mA (240mA)
90H
8Hz - 110KHz
3
4 x 2A3/6B4G
11,000
P-530R
3.0K
n/a
90mA (180mA)
140H
8Hz - 110KHz
3
300B
12,000
P-545R
4.6K
44%
90mA (180mA)
180H
10Hz - 100KHz
3
EL-34, 6CA7, 7591
12,000
P-566R
6.6K
44%
80mA (160mA)
220H
10Hz - 100KHz
3
6L6, 5881
13,000
P-580R
8.0K
44%
80mA (160mA)
250H
16Hz - 90KHz
3
807, VT62/801A
13,000

N Series 1,000V Rating
Secondary Impedance: 0-4-8 ohm Rated Output Power: 100W
Size : 11 cm x 13 cm x 11.5 cm
Model
Primary Coil
Inductance at 20Hz
Frequency Response (-3.0dB)Source Impedance = 0.7X
Weight
(kg./ea)
Recommended Circuit
Price (pair)
THB
Impedance
UL tap
Norminal DC current (max)
P-2210N
1.0K
n/a
250mA (500mA)
80H
5Hz - 120KHz
4.5
6C33-CB
14,000
P-2220N
2.0K
44%
160mA (320mA)
120H
5Hz - 120KHz
4.5
4 x EL34/6CA7
14,000
P-2250N
4.6K
44%
120mA (320mA)
240H
8Hz - 100KHz
4.5
6550, KT-88, KT90
15,000
P-2210KN
10.0K
44%
90mA (250mA)
400H
15Hz - 85KHz
4.5
211/845
18,000