What are Audio Transformers ?
Audio Transformers are specialized components designed to transfer audio signals between different circuits while minimizing signal loss and distortion. They are commonly used in applications such as production electronics assembly and maintenance. Important specifications for selection include Frequency Range, which affects the audio quality; Impedance, which ensures compatibility with other components; and DC Resistance (DCR), which influences power efficiency. Validating these specifications is crucial for ensuring optimal performance in audio applications.
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| Part & Mfr | Approval Agency | DC Resistance (DCR) | Frequency Range | Frequency Response | Height | Impedance | Insertion Loss | Mounting Type | Operating Temperature | Power Level | Return Loss | Size | Termination Style | Transformer Type | Turns Ratio | Voltage | |||
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Hammond Manufacturing
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- | 95.61Ohm | 50Hz ~ 12kHz | ±1dB | 3.873" (98.37mm) | 3.8kCT | - | Chassis Mount | - | 50W | - | 3.750" L x 3.320" W (95.25mm x 84.33mm) | Wire Leads | Push-Pull Audiophile, Ultra-Linear - Tube Output | 14.21:1 | - | |
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Hammond Manufacturing
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- | 32.74Ohm, 36.71Ohm | 30Hz ~ 30kHz | ±1dB | 3.810" (96.77mm) | 3.4kCT | - | Chassis Mount | - | 50W | - | 4.000" L x 3.130" W (101.60mm x 79.50mm) | Wire Leads | Push-Pull Audiophile, Ultra-Linear - Tube Output | - | 2000V @ 1 Second | |
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Hammond Manufacturing
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- | - | 30Hz ~ 30kHz | ±1dB | 4.560" (115.82mm) | 1.9kCT | ±1dB | Chassis Mount | - | 120W | - | 4.500" L x 3.750" W (114.30mm x 95.25mm) | Wire Leads | Push-Pull Audiophile, Ultra-Linear - Tube Output | - | - | |
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Hammond Manufacturing
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- | 25.72Ohm, 12.86Ohm | 50Hz ~ 12kHz | ±1dB | 4.623" (117.42mm) | 2kCT | - | Chassis Mount | - | 100W | - | 3.750" L x 3.936" W (95.25mm x 99.97mm) | Wire Leads | Push-Pull Audiophile, Ultra-Linear - Tube Output | 11.11:1 | - | |
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Hammond Manufacturing
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- | 22.07Ohm, 24.85Ohm | 30Hz ~ 30kHz | ±1dB | 4.560" (115.82mm) | 1.9kCT | - | Chassis Mount | - | 120W | - | 4.500" L x 3.750" W (114.30mm x 95.25mm) | Wire Leads | Push-Pull Audiophile, Ultra-Linear - Tube Output | - | 2000V @ 1 Second | |
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Hammond Manufacturing
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- | - | 30Hz ~ 30kHz | ±1dB | 5.250" (133.35mm) | 1.9kCT | ±1dB | Chassis Mount | - | 280W | - | 7.500" L x 4.380" W (190.50mm x 111.25mm) | Wire Leads | Push-Pull Audiophile, Ultra-Linear - Tube Output | - | - | |
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Hammond Manufacturing
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- | 15.65Ohm, 17.19Ohm | 30Hz ~ 30kHz | ±1dB | 5.250" (133.35mm) | 1.9kCT | - | Chassis Mount | - | 280W | - | 7.500" L x 4.380" W (190.50mm x 111.25mm) | Wire Leads | Push-Pull Audiophile, Ultra-Linear - Tube Output | - | 3535VDC @ 1 Second | |
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CLASSIC
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Tamura
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CSA-C22.2 No. 950-95, UL1950 | 152Ohm | 300Hz ~ 3.5kHz | ±1dB ~ ±4dB | 0.543" (13.80mm) | 600 | 3.75dB Max @ 1kHz | Through Hole | - | -20dB ~ 4dB | - | 0.886" L x 0.909" W (22.50mm x 23.10mm) | PC Pin | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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Triad Magnetics
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- | 76.53Ohm | 300Hz ~ 3.5kHz | ±0.5dB | 0.750" (19.05mm) | 600CT | 1.75dB Typ | Through Hole | -20°C ~ 85°C | -45dB ~ 7dB | 15dB Typ | 0.820" L x 0.715" W (20.83mm x 18.16mm) | PC Pin | Data/Voice Coupling | 1:1.07 | 1500VAC | |
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Tamura
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CSA-C22.2 No. 66-M1988, UL1459 | 72Ohm | 300Hz ~ 3.5kHz | ±0.5dB | 0.488" (12.40mm) | 600 | 1.5dB Max @ 1kHz | Through Hole | - | -45dB ~ 7dB | - | 0.799" L x 0.650" W (20.30mm x 16.50mm) | PC Pin | Data/Voice Coupling | 1:1 | 1500VRMS @ 1 Minute | |
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Tamura
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- | 70Ohm | 300Hz ~ 100kHz | ±2dB | 0.465" (11.80mm) | 600 | - | Through Hole | -20°C ~ 85°C | 50mW | - | 0.409" L x 0.310" W (10.40mm x 7.87mm) | PC Pin | Data/Voice Coupling | 2:1:1 | 1000VRMS @ 30 Seconds | |
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Triad Magnetics
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- | 5.3kOhm | 300Hz ~ 100kHz | ±2dB | 0.465" (11.80mm) | 200kCT | - | Through Hole | -20°C ~ 85°C | 10mW | - | 0.409" L x 0.310" W (10.40mm x 7.87mm) | PC Pin | Data/Voice Coupling | 14.1:1 | 500VRMS @ 1 Second | |
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Visaton GmbH & Co. KG
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- | - | 50Hz ~ 19kHz | -3dB | 1.693" (43.00mm) | - | - | Chassis Mount | - | - | - | 1.969" L x 1.575" W (50.00mm x 40.00mm) | Screw Terminal | - | - | - | |
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Visaton GmbH & Co. KG
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- | - | 20Hz ~ 20kHz | -3dB | 2.047" (52.00mm) | - | - | Chassis Mount | - | - | - | 1.654" L x 1.496" W (42.00mm x 38.00mm) | Screw Terminal | - | - | - | |
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Triad Magnetics
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- | 1kOhm | 300Hz ~ 100kHz | ±2dB | 0.465" (11.80mm) | 10k | - | Through Hole | -40°C ~ 85°C | 50mW | - | 0.410" L x 0.310" W (10.41mm x 7.87mm) | PC Pin | Audio Coupling | 2.1:1 | 1000VRMS @ 1 Second | |
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Triad Magnetics
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- | 104Ohm | 300Hz ~ 100kHz | ±2dB | 0.465" (11.80mm) | 900CT | - | Through Hole | -40°C ~ 85°C | 50mW | - | 0.410" L x 0.310" W (10.41mm x 7.87mm) | PC Pin | Audio Coupling | 1.22:1 | 1000VRMS @ 1 Second | |
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Hammond Manufacturing
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- | 14Ohm | 150Hz ~ 15kHz | ±1dB | 0.810" (20.57mm) | 100 | - | Chassis Mount | - | 100mW | - | 1.630" L x 0.880" W (41.40mm x 22.35mm) | Wire Leads | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 380Ohm | 200Hz ~ 15kHz | ±1dB | 0.690" (17.53mm) | 4kCT | 0.5dB | Through Hole | - | 300mW | - | 0.820" L x 0.680" W (20.83mm x 17.27mm) | PC Pin | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 24Ohm | 200Hz ~ 15kHz | ±1dB | 0.820" (20.83mm) | 160 | 0.5dB | Through Hole | - | 200mW | - | 1.060" L x 0.820" W (26.92mm x 20.83mm) | PC Pin | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 1.76kOhm | 200Hz ~ 15kHz | ±1dB | 0.690" (17.53mm) | 50k | 0.5dB | Through Hole | - | 12mW | - | 0.820" L x 0.680" W (20.83mm x 17.27mm) | PC Pin | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 480Ohm | 200Hz ~ 15kHz | ±1dB | 0.690" (17.53mm) | 3k | 0.5dB | Through Hole | - | 75mW | - | 0.820" L x 0.680" W (20.83mm x 17.27mm) | PC Pin | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 410Ohm | 200Hz ~ 15kHz | ±1dB | 0.690" (17.53mm) | 5kCT | 0.5dB | Through Hole | - | 300mW | - | 0.820" L x 0.680" W (20.83mm x 17.27mm) | PC Pin | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 45Ohm | 200Hz ~ 15kHz | ±1dB | 0.690" (17.53mm) | 600CT | 0.5dB | Through Hole | - | 300mW | - | 0.820" L x 0.680" W (20.83mm x 17.27mm) | PC Pin | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | - | 100Hz ~ 9kHz | 1dB | 1.690" (42.93mm) | 3.2 | 2dB | Chassis Mount | - | 4W | - | 2.810" L x 1.500" W (71.37mm x 38.10mm) | Solder Lug | Sound Distribution | - | - | |
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Hammond Manufacturing
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- | 1.89kOhm | 200Hz | -1dB | 0.750" (19.05mm) | 25k | 1dB | Through Hole | - | 35mW | - | 0.860" L x 0.710" W (21.84mm x 18.03mm) | PC Pin | Miniature Epoxy Potted | - | 200V | |
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Hammond Manufacturing
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- | 598.7Ohm | 200Hz | -1dB | 0.750" (19.05mm) | 10k | 1dB | Through Hole | - | 35mW | - | 0.860" L x 0.710" W (21.84mm x 18.03mm) | PC Pin | Miniature Epoxy Potted | - | 250V | |
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Hammond Manufacturing
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- | 700Ohm | 300Hz ~ 50kHz | ±1.5dB | 0.920" (23.37mm) | 10kCT | - | Through Hole | - | 2W | - | 1.315" L x 0.930" W (33.40mm x 23.62mm) | PC Pin | Miniature Epoxy Potted | - | - | |
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Hammond Manufacturing
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- | 102Ohm | 300Hz ~ 50kHz | ±1.5dB | 0.920" (23.37mm) | 1.5kCT | - | Through Hole | - | 2W | - | 1.315" L x 0.930" W (33.40mm x 23.62mm) | PC Pin | Miniature Epoxy Potted | 1.58:1 | 100VRMS | |
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Hammond Manufacturing
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- | - | 150Hz ~ 15kHz | ±1dB | 1.940" (49.28mm) | 2.5k, 4k | - | Chassis Mount | - | 8W | - | 3.250" L x 1.500" W (82.55mm x 38.10mm) | Wire Leads | General Purpose | - | - | |
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Hammond Manufacturing
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- | - | 50Hz ~ 10kHz | - | 3.810" (96.77mm) | 16, 8 | - | Chassis Mount | - | 250W | - | 4.250" L x 3.130" W (107.95mm x 79.50mm) | Wire Leads | Sound Distribution | - | 70V | |
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Hammond Manufacturing
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- | 178Ohm | 20Hz ~ 20kHz | ±1dB | 3.120" (79.25mm) | 5k | - | Chassis Mount | - | 4W | - | 3.120" L x 2.500" W (79.25mm x 63.50mm) | Wire Leads | Single Ended Audiophile, Ultra-Linear - Tube Output | - | 400VDC | |
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Hammond Manufacturing
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- | 1.18Ohm | - | - | 4.188" (106.38mm) | - | - | Chassis Mount | - | - | - | 3.438" L x 4.300" W (87.33mm x 109.22mm) | Wire Leads | - | - | 120/240VAC | |
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CLASSIC
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Murata
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- | - | - | - | 0.173" (4.40mm) | - | - | Surface Mount | - | - | - | 0.272" L x 0.150" W (6.90mm x 3.80mm) | Gull Wing | - | - | - | |
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Triad Magnetics
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- | 34Ohm | 300Hz ~ 3.5kHz | - | 0.870" (22.10mm) | 600 | 0.65dB Typ | Through Hole | -20°C ~ 85°C | -45dB ~ 7dB | 32dB Typ | 1.040" L x 0.960" W (26.42mm x 24.38mm) | PC Pin | Data/Voice Coupling | 1:1.47 | 1500VAC | |
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Tamura
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- | 1.1kOhm | 300Hz ~ 20kHz | ±3dB | 0.465" (11.80mm) | 10k | - | Through Hole | -20°C ~ 85°C | 10mW Max @ 300Hz | - | 0.409" L x 0.310" W (10.40mm x 7.87mm) | PC Pin | Data/Voice Coupling | 8.62:1 | 500VRMS @ 30 Seconds | |
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CLASSIC
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- | - | - | - | - | - | - | Chassis Mount | - | - | - | - | Wire Leads | General Purpose | - | - | |
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CLASSIC
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Hammond Manufacturing
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- | 341Ohm | 310Hz | -1dB | 0.480" (12.19mm) | 2k | 1.5dB | Through Hole | - | 20mW | - | 0.570" L x 0.570" W (14.48mm x 14.48mm) | PC Pin | Miniature Epoxy Potted | - | 100V | |
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Hammond Manufacturing
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- | 900Ohm | 310Hz | -1dB | 0.480" (12.19mm) | 6k | 1.5dB | Through Hole | - | 20mW | - | 0.570" L x 0.570" W (14.48mm x 14.48mm) | PC Pin | Miniature Epoxy Potted | - | 100V | |
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Hammond Manufacturing
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- | 1.585kOhm | 310Hz | -1dB | 0.480" (12.19mm) | 10k | 1.5dB | Through Hole | - | 20mW | - | 0.570" L x 0.570" W (14.48mm x 14.48mm) | PC Pin | Miniature Epoxy Potted | - | 100V | |
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CLASSIC
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Hammond Manufacturing
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- | 45Ohm | 150Hz ~ 15kHz | ±1dB | 0.810" (20.57mm) | 600CT | - | Chassis Mount | - | 135mW | - | 1.630" L x 0.880" W (41.40mm x 22.35mm) | Wire Leads | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 340Ohm | 150Hz ~ 15kHz | ±1dB | 0.810" (20.57mm) | 4k | - | Chassis Mount | - | 135mW | - | 1.630" L x 0.880" W (41.40mm x 22.35mm) | Wire Leads | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 700Ohm | 150Hz ~ 15kHz | ±1dB | 0.810" (20.57mm) | 10k | - | Chassis Mount | - | 135mW | - | 1.630" L x 0.880" W (41.40mm x 22.35mm) | Wire Leads | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 10Ohm | 150Hz ~ 15kHz | ±1dB | 0.690" (17.53mm) | 200CT | - | Chassis Mount | - | 150mW | - | 1.000" L x 0.690" W (25.40mm x 17.53mm) | Wire Leads | Economical Open Type | - | - | |
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Hammond Manufacturing
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- | 4.4Ohm | 150Hz ~ 15kHz | ±1dB | 0.810" (20.57mm) | 100CT | - | Chassis Mount | - | 700mW | - | 1.630" L x 0.880" W (41.40mm x 22.35mm) | Wire Leads | Economical Open Type | - | - | |
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CLASSIC
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CLASSIC
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