ISO Transformers, made in Tokyo
Soundaries is the authorized distributor of ISO Transformers in Thailand. ISO carries on the design and winding craft of the original ISO Co., the maker known worldwide as TANGO. Output transformers use Nippon Steel Orient Hi-B cut-cores, and power transformers use Orient-core with a magnetic shield. They are the same transformers we use in our own amplifiers.

Single-ended output
Orient Hi-B cut-core output transformers for single-ended amplifiers, from the 12 W FC-12S to the 40 W FC-40 series for 211 and 845.
FC-40-10S40 W · 10 kΩFor 211, 845฿24,600
- Power
- 40 W (30 Hz)
- Impedance
- Pri 10 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−2 dB)
- 20 Hz – 55 kHz
- Primary inductance
- 65 H (1 mW) · 80 H max at 70 mA
- Max DC current
- 130 mA
- Efficiency
- 0.23 dB / 16 Ω
- Application
- 211, 845
FC-40-5S40 W · 5 kΩFor DA30, '50, 845฿22,700
- Power
- 40 W (30 Hz)
- Impedance
- Pri 5 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−2 dB)
- 18 Hz – 70 kHz
- Primary inductance
- 35 H (1 mW) · 42 H max at 120 mA
- Max DC current
- 200 mA
- Efficiency
- 0.23 dB / 16 Ω
- Application
- DA30, '50, 845
FC-40-3.5S40 W · 3.5 kΩFor 300B, PX25฿22,700
- Power
- 40 W (30 Hz)
- Impedance
- Pri 3.5 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−2 dB)
- 15 Hz – 90 kHz
- Primary inductance
- 28 H (1 mW) · 38 H max at 120 mA
- Max DC current
- 250 mA
- Efficiency
- 0.23 dB / 16 Ω
- Application
- 300B, PX25
FC-40-2.7S40 W · 2.7 kΩFor 300B฿22,700
- Power
- 40 W (30 Hz)
- Impedance
- Pri 2.7 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−2 dB)
- 15 Hz – 90 kHz
- Primary inductance
- 25 H (1 mW) · 30 H max at 120 mA
- Max DC current
- 300 mA
- Efficiency
- 0.22 dB / 16 Ω
- Application
- 300B
FC-40-1.5S40 W · 1.5 kΩFor 300B parallel฿22,700
- Power
- 40 W (30 Hz)
- Impedance
- Pri 1.5 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−2 dB)
- 15 Hz – 120 kHz
- Primary inductance
- 10 H (1 mW) · 15 H max at 170 mA
- Max DC current
- 400 mA
- Efficiency
- 0.22 dB / 16 Ω
- Application
- 300B parallel
FC-30-10S30 W · 10 kΩFor 211, 845฿14,500
- Power
- 30 W (40 Hz)
- Impedance
- Pri 10 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−2 dB)
- 30 Hz – 70 kHz
- Primary inductance
- 40 H (1 mW) · 45 H max at 70 mA
- Max DC current
- 90 mA
- Efficiency
- 0.23 dB / 16 Ω
- Application
- 211, 845
FC-30-3.5SⅡ30 W · 3.5 kΩFor 300B, PX25฿14,500
- Power
- 30 W (40 Hz)
- Impedance
- Pri 3.5 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−2 dB)
- 20 Hz – 100 kHz
- Primary inductance
- 20 H (1 mW) · 26 H max at 80 mA
- Max DC current
- 180 mA
- Efficiency
- 0.19 dB / 16 Ω
- Application
- 300B, PX25
FC-30-2.5S30 W · 2.5 kΩFor AD1, Ed, 2A3฿14,500
- Power
- 30 W (40 Hz)
- Impedance
- Pri 2.5 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−2 dB)
- 20 Hz – 120 kHz
- Primary inductance
- 14 H (1 mW) · 20 H max at 90 mA
- Max DC current
- 250 mA
- Efficiency
- 0.19 dB / 16 Ω
- Application
- AD1, Ed, 2A3
FC-20S20 W · 5 / 3.5 / 2.5 kΩFor 300B, '50, PX25, PX4, 2A3, VT-52฿8,900
- Power
- 20 W (50 Hz at 5 kΩ · 40 Hz at 3.5 kΩ · 35 Hz at 2.5 kΩ)
- Impedance
- Pri 5 k / 3.5 k / 2.5 kΩ · Sec 8, 16 Ω
- Response (−2 dB)
- 35 Hz – 80 kHz (5 k) · 25 Hz – 80 kHz (3.5 k) · 20 Hz – 100 kHz (2.5 k)
- Primary inductance
- 16 H (1 mW) · 18 H max at 80 mA
- Max DC current
- 140 mA
- Efficiency
- 0.26 / 0.34 / 0.47 dB / 16 Ω
- Application
- 300B, '50, PX25, PX4, 2A3, VT-52
FC-20-14S20 W · 14 kΩFor VT62, 801A, VT25 (10)฿8,900
- Power
- 20 W (60 Hz)
- Impedance
- Pri 14 kΩ · Sec 4, 8, 16 Ω
- Response (−2 dB)
- 25 Hz – 35 kHz
- Primary inductance
- 70 H (1 mW) · 90 H max at 30 mA
- Max DC current
- 65 mA
- Efficiency
- 0.29 dB / 16 Ω
- Application
- VT62, 801A, VT25 (10)
FC-20-107S20 W · 10 / 7 kΩFor VT25 (10), 6N6G, 42, 6V6฿8,900
- Power
- 20 W (60 Hz at 10 kΩ · 50 Hz at 7 kΩ)
- Impedance
- Pri 10 k / 7 kΩ · Sec 8, 16 Ω
- Response (−2 dB)
- 40 Hz – 40 kHz (10 k) · 25 Hz – 50 kHz (7 k)
- Primary inductance
- 30 H (1 mW) · 38 H max at 55 mA
- Max DC current
- 100 mA
- Efficiency
- 0.19 / 0.25 dB / 16 Ω
- Application
- VT25 (10), 6N6G, 42, 6V6
FC-12S12 W · 7 / 5 / 3.5 / 2.5 kΩFor 45, 71A, EL34, 6L6, 6V6, 6BQ5฿7,400
- Power
- 12 W (70 Hz at 7 k · 60 Hz at 5 k · 50 Hz at 3.5 k · 40 Hz at 2.5 k)
- Impedance
- Pri 7 k / 5 k (Sec 8, 16 Ω) · 3.5 k / 2.5 k (Sec 4, 8 Ω)
- Response (−2 dB)
- 45 Hz – 45 kHz (7 k) to 20 Hz – 80 kHz (2.5 k)
- Primary inductance
- 16 H (1 mW) · 20 H max at 60 mA
- Max DC current
- 80 mA
- Efficiency
- 0.24 – 0.58 dB
- Application
- 45, 71A, EL34, 6L6, 6V6, 6BQ5

Push-pull output
Orient Hi-B cut-core push-pull output transformers from 25 W to 120 W, with wide bandwidth down to 4 Hz.
FC-120-14120 W · 14 kΩFor 211฿22,700
- Power
- 120 W (30 Hz)
- Impedance
- Pri 14 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−1 dB)
- 4 Hz – 50 kHz
- Primary inductance
- 360 H (1 mW) · 1,600 H max
- Max DC current
- 260 mA (two tubes) · 5 mA unbalance
- Efficiency
- 0.16 dB
- Application
- 211
FC-120-8120 W · 8 kΩFor EL156, KT66฿22,700
- Power
- 120 W (30 Hz)
- Impedance
- Pri 8 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−1 dB)
- 4 Hz – 60 kHz
- Primary inductance
- 220 H (1 mW) · 970 H max
- Max DC current
- 320 mA (two tubes) · 6 mA unbalance
- Efficiency
- 0.16 dB
- Application
- EL156, KT66
FC-120-5120 W · 5 kΩ · cathode NFB windingFor 300B, KT88, KT66, EL156฿24,100
- Power
- 120 W (30 Hz)
- Impedance
- Pri 5 kΩ · Sec 4, 8, 16 Ω
- Response (−1 dB)
- 4 Hz – 90 kHz
- Primary inductance
- 160 H (1 mW) · 580 H max
- Max DC current
- 420 mA (two tubes) · 8 mA unbalance
- Efficiency
- 0.18 dB
- Extra
- Includes cathode NFB winding
- Application
- 300B, KT88, KT66, EL156
FC-120-3.5120 W · 3.5 kΩFor 300B, 6550, EL156฿22,700
- Power
- 120 W (30 Hz)
- Impedance
- Pri 3.5 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−1 dB)
- 4 Hz – 100 kHz
- Primary inductance
- 120 H (1 mW) · 420 H max
- Max DC current
- 500 mA (two tubes) · 12 mA unbalance
- Efficiency
- 0.16 dB
- Application
- 300B, 6550, EL156
FC-60-560 W · 5 kΩFor 300B, KT88, KT66, EL156฿14,500
- Power
- 60 W (30 Hz)
- Impedance
- Pri 5 kΩ · Sec 4, 6, 8, 16 Ω
- Response (−1 dB)
- 4 Hz – 80 kHz
- Primary inductance
- 160 H (1 mW) · 380 H max
- Max DC current
- 270 mA (two tubes) · 7 mA unbalance
- Efficiency
- 0.21 dB
- Application
- 300B, KT88, KT66, EL156
FC-40-840 W · 8 kΩFor 6L6GC, 7591, 6F6฿8,900
- Power
- 40 W (45 Hz)
- Impedance
- Pri 8 kΩ · Sec 4, 8, 16 Ω
- Response (−1 dB)
- 5 Hz – 60 kHz
- Primary inductance
- 150 H (1 mW) · 500 H max
- Max DC current
- 200 mA (two tubes) · 5 mA unbalance
- Efficiency
- 0.24 dB
- Application
- 6L6GC, 7591, 6F6
FC-40-6.640 W · 6.6 kΩFor KT66, 6L6, EL34, 7591฿8,900
- Power
- 40 W (45 Hz)
- Impedance
- Pri 6.6 kΩ · Sec 4, 8, 16 Ω
- Response (−1 dB)
- 7 Hz – 50 kHz
- Primary inductance
- 160 H (1 mW) · 330 H max
- Max DC current
- 200 mA (two tubes) · 7 mA unbalance
- Efficiency
- 0.25 dB
- Application
- KT66, 6L6, EL34, 7591
FC-40-540 W · 5 kΩFor 2A3, 6B4G, EL34, 6L6฿8,900
- Power
- 40 W (45 Hz)
- Impedance
- Pri 5 kΩ · Sec 4, 8, 16 Ω
- Response (−1 dB)
- 5 Hz – 80 kHz
- Primary inductance
- 150 H (1 mW) · 320 H max
- Max DC current
- 270 mA (two tubes) · 7 mA unbalance
- Efficiency
- 0.25 dB
- Application
- 2A3, 6B4G, EL34, 6L6
FC-25-825 W · 8 kΩFor 6V6, 6BQ5, 71A฿7,400
- Power
- 25 W (50 Hz)
- Impedance
- Pri 8 kΩ · Sec 4, 8, 16 Ω
- Response (−1 dB)
- 7 Hz – 50 kHz
- Primary inductance
- 160 H (1 mW) · 350 H max
- Max DC current
- 130 mA (two tubes) · 6 mA unbalance
- Efficiency
- 0.3 dB
- Application
- 6V6, 6BQ5, 71A
FC-25-525 W · 5 kΩFor 45, 6V6, 6CW5฿7,400
- Power
- 25 W (50 Hz)
- Impedance
- Pri 5 kΩ · Sec 4, 8, 16 Ω
- Response (−1 dB)
- 7 Hz – 80 kHz
- Primary inductance
- 100 H (1 mW) · 210 H max
- Max DC current
- 160 mA (two tubes) · 7 mA unbalance
- Efficiency
- 0.3 dB
- Application
- 45, 6V6, 6CW5

Interstage
1:1 interstage transformer for coupling a driver stage to the output tube without a capacitor.
NC-20FⅡ1:1 · 5 kΩFor 6AH4, 6V6 (triode), 5687, 6463฿15,300
- Primary impedance
- 5 kΩ (rp = 1–10 kΩ)
- Turns ratio
- 1 : 1
- Response (−2 dB)
- 15 Hz – 100 kHz
- Primary inductance
- 75 H at 25 mA
- Max DC current
- 50 mA
- Max secondary output
- 160 V at 10 Hz
- Application
- 6AH4, 6V6 (triode), 5687, 6463

Line & input
Line output and 600 Ω input transformers for preamplifiers and balanced connections.
NP-12620k / 10k : 0–1.2k ΩFor Line output; input transformer in reverse฿8,400
- Impedance
- Pri 20 kΩ (split) : Sec 0–150–300–600–1.2 kΩ · Pri 10 kΩ (split) : Sec 0–75–150–300–600 Ω
- Turns ratio
- 1 : 0.245
- Response (−2 dB)
- 20 Hz – 30 kHz
- Primary inductance
- 110 H at 10 mA
- Max primary DC
- 20 mA
- Max secondary output
- 10 Vrms (20 Hz)
- Application
- Line output; input transformer in reverse
NN-606600 : 600 Ω inputFor 600 Ω balanced input฿8,400
- Impedance
- Pri 600 Ω / 150 Ω (split) · Sec 600 Ω / 150 Ω (split)
- Turns ratio
- 1+1 : 1+1
- Secondary output
- 10 V (20 Hz)
- Primary inductance
- 60 H (1 V, 50 Hz)
- Response (−1 dB)
- 5 Hz – 60 kHz
- Application
- 600 Ω balanced input

Power · bowl case
Orient-core power transformers with magnetic shield in the classic bowl-shaped case. Primary voltage can be changed to 220–240 V at no extra charge.
MS-4042360–400 V · 420 mA bridgeFor KT88, 6550A, EL156 PP ×2฿11,400
- Secondaries
- 0–20–360–400 V AC 0.72 A (DC bridge 420 mA) · 70 V AC 60 mA · 6.3 V 4 A ×2 · 6.3 V 3 A ×2
- Application
- KT88, 6550A, EL156 PP ×2
- Size
- W120×D105×H110 mm (under chassis 36 mm)
- Weight
- 6.5 kg
MS-1913145–185 V · voltage doubler 350 mAFor KT88, KT66, EL34 PP ×2฿10,000
- Secondaries
- 0–10–145–165–185 V AC 1.3 A (DC voltage doubler 350 mA) · 65 V AC 0.15 A · 6.3 V 3.6 A ×2 · 6.3 V 2.5 A ×2
- Application
- KT88, KT66, EL34 PP ×2
- Size
- W120×D105×H100 mm (under chassis 32 mm)
- Weight
- 5.7 kg
MS-4023Ⅱ360–400 V CT · 250 mAFor 300B SE ×2, KT88 PP ×1฿9,000
- Secondaries
- 400–360–0–100–360–400 V AC 0.23 A (DC CT tube 250 mA / Si 220 mA) · 5 V 3.5 A ×2 · 0–6.3–10 V 3.5 A · 0–5–6.3 V 3.5 A
- Application
- 300B SE ×2, KT88 PP ×1
- Size
- W120×D105×H95 mm (under chassis 32 mm)
- Weight
- 5.3 kg
MS-3228280–320 V CT · 300 mAFor 2A3, 6B4G, 6L6, VT52 PP ×2฿9,000
- Secondaries
- 320–280–0–70–280–320 V AC 0.28 A (DC CT tube 300 mA / Si 260 mA) · 0–2.5–6.3 V 5.2 A ×2 · 6.3 V 3 A · 5 V 3 A
- Application
- 2A3, 6B4G, 6L6, VT52 PP ×2
- Size
- W120×D105×H95 mm (under chassis 32 mm)
- Weight
- 5.3 kg
MS-4019280–400 V CT · 190 mAFor PX25, PX4, AD1, RE604 SE ×2฿8,300
- Secondaries
- 400–280–0–120–280–400 V AC 0.185 A (DC CT tube 190 mA / Si 180 mA) · 4.5 V 3.5 A ×2 · 0–4–5 V 4 A · 0–4–6.3 V 3 A
- Application
- PX25, PX4, AD1, RE604 SE ×2
- Size
- W110×D96×H108 mm (under chassis 32 mm)
- Weight
- 5.1 kg
MS-4018370–400 V CT · 180 mAFor 300B SE ×2, 300B PP ×1฿7,400
- Secondaries
- 400–370–0–370–400 V AC 0.18 A (DC CT tube 180 mA / Si 170 mA) · 5 V 3 A · 5 V 2.5 A ×2 · 0–6.3–10 V 2 A
- Application
- 300B SE ×2, 300B PP ×1
- Size
- W110×D96×H92 mm (under chassis 31 mm)
- Weight
- 4.5 kg
MS-3716280–370 V CT · 160 mAFor PX25, RE604, AD1, PX4 SE ×2฿6,700
- Secondaries
- 370–280–0–280–370 V AC 0.16 A (DC CT tube 160 mA / Si 150 mA) · 0–4–5 V 3 A · 4.5 V 3.5 A ×2 · 6.3 V 3 A
- Application
- PX25, RE604, AD1, PX4 SE ×2
- Size
- W110×D96×H82 mm (under chassis 30 mm)
- Weight
- 3.8 kg
MS-3216280–320 V CT · 160 mAFor 2A3, 45 SE ×2฿6,700
- Secondaries
- 320–280–0–70–280–320 V AC 0.16 A (DC CT tube 160 mA / Si 145 mA) · 5 V 3 A · 2.5 V 3 A ×2 · 6.3 V 3 A
- Application
- 2A3, 45 SE ×2
- Size
- W110×D96×H82 mm (under chassis 30 mm)
- Weight
- 3.8 kg
MS-3221280–320 V CT · 210 mAFor 6V6, 6BQ5, 6F6 PP ×2฿6,700
- Secondaries
- 320–280–0–70–280–320 V AC 0.205 A (DC CT tube 210 mA / Si 200 mA) · 5 V 3 A · 6.3 V 2 A ×3
- Application
- 6V6, 6BQ5, 6F6 PP ×2
- Size
- W110×D96×H82 mm (under chassis 30 mm)
- Weight
- 3.8 kg
MS-4812250–480 V CT · 125 mAFor VT62, 801A SE ×2฿6,700
- Secondaries
- 480–250–0–250–480 V AC 0.12 A (DC CT tube 125 mA / Si 115 mA) · 5 V 3 A · 6.3 V 3 A · 7.5 V 2 A ×2
- Application
- VT62, 801A SE ×2
- Size
- W110×D96×H82 mm (under chassis 30 mm)
- Weight
- 3.8 kg
MS-2814250–280 V CT · 140 mAFor 6V6, 6BQ5 PP ×1 or SE ×2฿5,600
- Secondaries
- 280–250–0–250–280 V AC 135 mA (DC CT tube 140 mA / Si 130 mA) · 5 V 2 A · 6.3 V 2 A ×3
- Application
- 6V6, 6BQ5 PP ×1 or SE ×2
- Size
- W94×D77×H78 mm (under chassis 31 mm)
- Weight
- 2.6 kg
MS-2810250–280 V CT · 100 mAFor 6BQ5, 6GW8 SE ×2 · preamp฿5,100
- Secondaries
- 280–250–0–250–280 V AC 100 mA (DC CT tube 100 mA / Si 100 mA) · 0–5–6.3 V 2 A · 6.3 V 3 A
- Application
- 6BQ5, 6GW8 SE ×2 · preamp
- Size
- W85×D70×H75 mm (under chassis 30 mm)
- Weight
- 2.3 kg
MS-2603260 V CT · 30 mA + 15–17 VFor Preamplifier฿4,700
- Secondaries
- 260–0–260 V AC 30 mA (DC CT 30 mA) · 0–15–17 V AC 2 A (DC bridge 1.2 A) · 6.3 V 1 A
- Application
- Preamplifier
- Size
- W85×D70×H60 mm (under chassis 22 mm)
- Weight
- 1.6 kg

Power · rectangular case
Fully cased Orient-core power transformers with magnetic shield, for larger amplifiers such as 211, 845 and push-pull 300B. Primary voltage changed at no extra charge.
MS-211DL370 V + 150 V · 10.5 V filamentsFor 211, 845 SE ×2฿23,700
- Secondaries
- 370–0–370 V AC 0.36 A (DC bridge 200 mA) · 150–0–150 V AC 0.1 A (DC bridge 60 mA) · 10.5 V 5 A ×2 · 6.3 V 4.5 A · 5 V 3 A
- Application
- 211, 845 SE ×2
- Size
- W125×D125×H180 mm (under chassis 36 mm)
- Weight
- 11 kg
MS-4233D370–420 V CT · 350 mAFor 300B PP ×2฿18,600
- Secondaries
- 420–370–0–120–370–420 V AC 0.33 A (DC CT tube 350 mA / Si 320 mA) · 5 V 4 A ×2 · 5 V 6 A · 0–6.3–10 V 3 A
- Application
- 300B PP ×2
- Size
- W125×D125×H138 mm (under chassis 36 mm)
- Weight
- 9.0 kg
MS-4042D360–400 V · 420 mA bridgeFor KT88, 6550A, EL156 PP ×2฿17,000
- Secondaries
- 0–20–360–400 V AC 0.72 A (DC bridge 420 mA) · 70 V AC 60 mA · 6.3 V 4 A ×2 · 6.3 V 3 A ×2
- Application
- KT88, 6550A, EL156 PP ×2
- Size
- W125×D125×H138 mm (under chassis 36 mm)
- Weight
- 9.0 kg
MS-4016D370–400 V doubler · 10 V filamentsFor 211, 845 SE ×2฿16,500
- Secondaries
- 0–370–400 V AC 0.6 A (DC voltage doubler 160 mA) · 150–0–150 V AC 60 mA · 10 V 5 A ×2 · 6.3 V 2 A ×2
- Application
- 211, 845 SE ×2
- Size
- W125×D125×H114 mm (under chassis 36 mm)
- Weight
- 8.0 kg
MS-1913D145–185 V · voltage doubler 350 mAFor KT88, KT66, EL34 PP ×2฿14,300
- Secondaries
- 0–10–145–165–185 V AC 1.3 A (DC voltage doubler 350 mA) · 65 V AC 0.15 A · 6.3 V 3.6 A ×2 · 6.3 V 2.5 A ×2
- Application
- KT88, KT66, EL34 PP ×2
- Size
- W125×D125×H114 mm (under chassis 36 mm)
- Weight
- 7.7 kg
MS-4023DⅡ360–400 V CT · 250 mAFor 300B SE ×2, KT88 PP ×1฿14,000
- Secondaries
- 400–360–0–100–360–400 V AC 0.23 A (DC CT tube 250 mA / Si 220 mA) · 5 V 3.5 A ×2 · 0–6.3–10 V 3.5 A · 0–5–6.3 V 3.5 A
- Application
- 300B SE ×2, KT88 PP ×1
- Size
- W125×D125×H114 mm (under chassis 36 mm)
- Weight
- 7.3 kg

Choke coils
Filter chokes for capacitor-input and choke-input power supplies.
LC-15-150DⅡ15 H · 150 mAFor Capacitor-input filter฿5,100
- Rating
- 15 H 150 mA
- Max current
- 200 mA
- DC resistance
- 165 Ω
- Application
- Capacitor-input filter
- Size
- W85×D80×H105 mm
- Weight
- 2.4 kg
LC-10-200DⅡ10 H · 200 mAFor Capacitor-input filter฿5,100
- Rating
- 10 H 200 mA
- Max current
- 260 mA
- DC resistance
- 120 Ω
- Application
- Capacitor-input filter
- Size
- W85×D80×H105 mm
- Weight
- 2.4 kg
LC-5-250DⅡ5 H · 250 mAFor Capacitor-input filter฿5,100
- Rating
- 5 H 250 mA
- Max current
- 330 mA
- DC resistance
- 67 Ω
- Application
- Capacitor-input filter
- Size
- W85×D80×H105 mm
- Weight
- 2.4 kg
LC-3-350DⅡ3 H · 350 mAFor Capacitor-input filter฿5,100
- Rating
- 3 H 350 mA
- Max current
- 450 mA
- DC resistance
- 42 Ω
- Application
- Capacitor-input filter
- Size
- W85×D80×H105 mm
- Weight
- 2.4 kg
LE-12-150D12 H · 150 mAFor Capacitor-input filter, compact฿4,500
- Rating
- 12 H 150 mA
- Max current
- 170 mA
- DC resistance
- 180 Ω
- Application
- Capacitor-input filter, compact
- Size
- W78×D72×H95 mm
- Weight
- 1.8 kg
LE-8-200D8 H · 200 mAFor Capacitor-input filter, compact฿4,500
- Rating
- 8 H 200 mA
- Max current
- 230 mA
- DC resistance
- 125 Ω
- Application
- Capacitor-input filter, compact
- Size
- W78×D72×H95 mm
- Weight
- 1.8 kg
LE-5-250D5 H · 250 mAFor Capacitor-input filter, compact฿4,500
- Rating
- 5 H 250 mA
- Max current
- 300 mA
- DC resistance
- 80 Ω
- Application
- Capacitor-input filter, compact
- Size
- W78×D72×H95 mm
- Weight
- 1.8 kg
LL-20-150D20 H · 150 mA · choke inputFor Choke-input filter (also capacitor-input)฿8,400
- Rating
- 20 H 150 mA
- Max DC current
- 200 mA
- DC resistance
- 220 Ω
- Max AC voltage
- 700 V
- Min current (Imin)
- 35 mA
- Application
- Choke-input filter (also capacitor-input)
- Size
- W85×D80×H105 mm
- Weight
- 2.4 kg
LL-12-200D12 H · 200 mA · choke inputFor Choke-input filter (also capacitor-input)฿8,400
- Rating
- 12 H 200 mA
- Max DC current
- 260 mA
- DC resistance
- 145 Ω
- Max AC voltage
- 600 V
- Min current (Imin)
- 50 mA
- Application
- Choke-input filter (also capacitor-input)
- Size
- W85×D80×H105 mm
- Weight
- 2.4 kg
LL-5-300D5 H · 300 mA · choke inputFor Choke-input filter (also capacitor-input)฿8,400
- Rating
- 5 H 300 mA
- Max DC current
- 350 mA
- DC resistance
- 55 Ω
- Max AC voltage
- 500 V
- Min current (Imin)
- 100 mA
- Application
- Choke-input filter (also capacitor-input)
- Size
- W85×D80×H105 mm
- Weight
- 2.4 kg

W choke (2 windings)
Two-winding chokes for capacitor-input supplies. Windings can be used in series or in parallel, never alone.
RC-160-15W160 H 15 mA (40 H 30 mA)For Capacitor-input filter฿4,500
- Rating
- 160 H 15 mA (40 H 30 mA in parallel)
- Max current
- 20 mA (40 mA)
- DC resistance
- 1,160 Ω (290 Ω)
- Application
- Capacitor-input filter
RC-60-35W60 H 35 mA (15 H 70 mA)For Capacitor-input filter฿4,500
- Rating
- 60 H 35 mA (15 H 70 mA in parallel)
- Max current
- 50 mA (100 mA)
- DC resistance
- 730 Ω (183 Ω)
- Application
- Capacitor-input filter
RC-10-130W10 H 130 mA (2.5 H 260 mA)For Capacitor-input filter฿4,500
- Rating
- 10 H 130 mA (2.5 H 260 mA in parallel)
- Max current
- 150 mA (300 mA)
- DC resistance
- 130 Ω (33 Ω)
- Application
- Capacitor-input filter
RC-28-80W28 H 80 mA (7 H 160 mA)For Capacitor-input filter฿4,500
- Rating
- 28 H 80 mA (7 H 160 mA in parallel)
- Max current
- 90 mA (180 mA)
- DC resistance
- 360 Ω (90 Ω)
- Application
- Capacitor-input filter

Plate / driver choke
High-inductance chokes for plate or cathode loading of driver tubes, also usable as B+ filter chokes.
LCP-60-80D60 H · 80 mAFor Driver plate or cathode choke · B+ filter฿8,400
- Rating
- 60 H 80 mA
- Max current
- 100 mA
- Response (−1 dB)
- 7 Hz – 300 kHz (4 V, rp = 1 kΩ)
- DC resistance
- 570 Ω
- Application
- Driver plate or cathode choke · B+ filter
LCP-100-60D100 H · 60 mAFor Driver plate or cathode choke · B+ filter฿8,400
- Rating
- 100 H 60 mA
- Max current
- 100 mA
- Response (−1 dB)
- 7 Hz – 300 kHz (4 V, rp = 1 kΩ)
- DC resistance
- 570 Ω
- Application
- Driver plate or cathode choke · B+ filter
No ISO model matches your search. Try a tube type such as 300B or 845, or ask us for a recommendation.
Prices are final retail prices in Thai Baht, including import handling, for delivery in Thailand. Specifications from the ISO Transformers catalogue (Nov 2024). Overseas buyers, please ask for a quote.