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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Allied Components International
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- | 65mOhm | - | - | 0.740" (18.80mm) | 600CT | - | Through Hole | -20°C ~ 80°C | 460mW | - | 0.980" L x 0.720" W (24.89mm x 18.29mm) | PC Pin | Impedance Matching | 1:1 | 100VAC | |
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Hammond Manufacturing
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- | - | 70Hz ~ 11kHz | ±1dB | 1.000" (25.40mm) | 600CT | - | Chassis Mount | - | - | - | 1.250" Dia (31.75mm) | Wire Leads | Shielded | 1:1 | - | |
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Allied Components International
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- | 330Ohm | - | - | 0.551" (14.00mm) | 10k | - | Through Hole | -40°C ~ 85°C | - | - | 0.689" L x 0.610" W (17.50mm x 15.50mm) | PC Pin | Impedance Matching | 1:1 | 1000V | |
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Premier Magnetics
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- | 30Ohm | - | - | 0.551" (14.00mm) | 500CT | - | Through Hole | - | 100mW | - | 0.697" L x 0.630" W (17.70mm x 16.00mm) | PC Pin | Economical Open Type | - | 1000Vrms | |
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Premier Magnetics
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- | 22Ohm | - | - | 0.551" (14.00mm) | 500CT | - | Through Hole | - | 100mW | - | 0.697" L x 0.630" W (17.70mm x 16.00mm) | PC Pin | Economical Open Type | - | 1000Vrms | |
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Premier Magnetics
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- | 2.5Ohm | - | - | 0.551" (14.00mm) | 48CT | - | Through Hole | - | 100mW | - | 0.697" L x 0.630" W (17.70mm x 16.00mm) | PC Pin | Economical Open Type | - | 1000Vrms | |
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Premier Magnetics
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- | 80Ohm | - | - | 0.638" (16.20mm) | 1.2kCT | - | Through Hole | - | 200mW | - | 0.799" L x 0.571" W (20.30mm x 14.50mm) | PC Pin | Economical Open Type | - | 1000Vrms | |
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Allied Components International
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- | 44Ohm | - | ±0.5dB | 0.736" (18.70mm) | - | 1.4dB | Through Hole | -40°C ~ 85°C | - | - | 0.815" L x 0.650" W (20.70mm x 16.50mm) | PC Pin | Data/Voice Coupling | 1:1 | 1500V | |
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Allied Components International
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- | 56.5Ohm | - | ±1dB | 0.740" (18.80mm) | 600 | 0.8dB Typ | Through Hole | 0°C ~ 105°C | - | 30dB Typ | 0.812" L x 0.715" W (20.62mm x 18.16mm) | PC Pin | Data/Voice | 1.35:1:1 | 1500VAC | |
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Allied Components International
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- | 820Ohm | - | - | 0.748" (19.00mm) | 10k | - | Through Hole | -20°C ~ 85°C | - | - | 0.827" L x 0.787" W (21.00mm x 20.00mm) | PC Pin | Impedance Matching | 1:1 | 1000V | |
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Allied Components International
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- | 190Ohm, 380Ohm | 300Hz ~ 3.5kHz | ±0.5dB | 0.750" (19.05mm) | 10kCT | 1dB @ 1kHz Max | Through Hole | 0°C ~ 105°C | - | 24dB @ 300Hz ~ 3.5kHz Min | 0.800" L x 0.670" W (20.32mm x 17.02mm) | PC Pin | Impedance Matching | 1:1:2 | 1200VAC | |
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Allied Components International
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- | 44Ohm | 200Hz ~ 15kHz | ±2dB | 0.740" (18.80mm) | 600CT | 1.5dB @ 1kHz Max | Through Hole | 0°C ~ 105°C | - | - | 0.812" L x 0.700" W (20.62mm x 17.78mm) | PC Pin | Impedance Matching | 1:1 | 1500Vrms @ 1 Second | |
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Radio Design Labs
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CE | - | 20Hz ~ 20kHz | ±0.5dB | 3.000" (76.20mm) | 10k | - | Chassis Mount | 0°C ~ 55°C | - | - | 1.500" L x 1.201" W (38.10mm x 30.50mm) | Screw Terminal | Impedance Matching | - | - | |
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Radio Design Labs
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CE | - | 20Hz ~ 20kHz | ±0.1dB | 2.059" (52.30mm) | 600 | 2dB Typ | Chassis Mount | 0°C ~ 55°C | - | - | 3.169" L x 1.752" W (80.50mm x 44.50mm) | Screw Terminal | Impedance Matching | 1:1 | - | |
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Hammond Manufacturing
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- | - | 20Hz ~ 20kHz | ±1dB | 4.560" (115.82mm) | 5k | ±1dB | Chassis Mount | - | 25W | - | 5.000" L x 3.750" W (127.00mm x 95.25mm) | Wire Leads | Single Ended Audiophile, Ultra-Linear - Tube Output | - | - | |
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Hammond Manufacturing
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- | 66.8Ohm, 160.5Ohm | 30Hz ~ 30kHz | ±1dB | 4.250" (107.95mm) | 6.6kCT | ±1dB | Through Hole | - | 60W | - | 3.880" L x 3.310" W (98.55mm x 84.07mm) | - | Push-Pull Potted, Ultra-Linear - Tube Output | - | 2000V @ 1 Second | |
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Hammond Manufacturing
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- | - | 20Hz ~ 20kHz | ±1dB | 4.560" (115.82mm) | 11.25k | ±1dB | Chassis Mount | - | 25W | - | 5.000" L x 3.750" W (127.00mm x 95.20mm) | Wire Leads | Single Ended Audiophile, Ultra-Linear - Tube Output | - | - | |
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Hammond Manufacturing
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- | - | 20Hz ~ 20kHz | ±1dB | 4.560" (115.82mm) | 6.5k | ±1dB | Chassis Mount | - | 25W | - | 5.000" L x 3.750" W (127.00mm x 95.20mm) | Wire Leads | Single Ended Audiophile, Ultra-Linear - Tube Output | - | - | |
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Hammond Manufacturing
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- | - | 20Hz ~ 20kHz | ±1dB | 4.560" (115.82mm) | 25k | ±1dB | Chassis Mount | - | 25W | - | 5.000" L x 3.750" W (127.00mm x 95.20mm) | Wire Leads | Single Ended Audiophile, Ultra-Linear - Tube Output | - | - | |
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Hammond Manufacturing
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- | - | 30Hz ~ 30kHz | ±1dB | 4.250" (107.95mm) | 3.4kCT | - | Through Hole | - | 50W | - | 3.880" L x 3.310" W (98.55mm x 84.07mm) | - | Push-Pull Potted, Ultra-Linear - Tube Output | - | - | |
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Hammond Manufacturing
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- | 44Ohm, 98.5Ohm | 30Hz ~ 30kHz | ±1dB | 4.500" (114.30mm) | 5k | - | Through Hole | - | 100W | - | 5.000" L x 4.250" W (127.00mm x 107.95mm) | - | Push-Pull Potted, Ultra-Linear - Tube Output | - | 2000V @ 1 Second | |
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Hammond Manufacturing
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- | 47Ohm | 300Hz ~ 3.4kHz | 3dB | 0.730" (18.54mm) | 600 | 2dB | Through Hole | - | - | 9dB | 0.800" L x 0.720" W (20.32mm x 18.29mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 47Ohm | 300Hz ~ 3.4kHz | 0.5dB | 0.640" (16.26mm) | 600 | 1.5dB | Through Hole | - | - | 12dB | 0.810" L x 0.690" W (20.57mm x 17.53mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 90Ohm | 300Hz ~ 3.4kHz | 1dB | 0.810" (20.57mm) | 600 | 2dB | Through Hole | - | - | 12dB | 1.065" L x 1.080" W (27.05mm x 27.43mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 67Ohm | 300Hz ~ 3.4kHz | 0.5dB | 0.650" (16.51mm) | 600 | 1.5dB | Through Hole | - | - | 26dB | 1.650" L x 1.340" W (41.91mm x 34.04mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 45Ohm | 300Hz ~ 3.4kHz | 0.5dB | 0.730" (18.54mm) | 600 | 1.5dB | Through Hole | - | - | 12dB | 0.800" L x 0.720" W (20.32mm x 18.29mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | - | - | - | 1.000" (25.40mm) | - | - | Chassis Mount | - | - | - | 1.250" Dia (31.75mm) | Screw Terminal | - | - | - | |
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Hammond Manufacturing
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- | 47Ohm | 300Hz ~ 3.4kHz | 3dB | 0.640" (16.26mm) | 600 | 2dB | Through Hole | - | - | 9dB | 0.810" L x 0.690" W (20.57mm x 17.53mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 34Ohm | 300Hz ~ 3.4kHz | 0.5dB | 0.500" (12.70mm) | 600 | 1.25dB | Through Hole | - | - | 24dB | 0.955" L x 0.685" W (24.26mm x 17.40mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 31Ohm | 300Hz ~ 3.4kHz | 0.5dB | 0.400" (10.16mm) | 600 | 0.7dB | Through Hole | - | - | 18dB | 0.375" L x 0.310" W (9.53mm x 7.87mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 74Ohm | 300Hz ~ 3.4kHz | 1dB | 0.500" (12.70mm) | 600 | 2dB | Through Hole | - | - | 18dB | 1.290" L x 1.400" W (32.77mm x 35.56mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 74Ohm | 300Hz ~ 3.4kHz | 1dB | 0.500" (12.70mm) | 600CT | 2dB | Through Hole | - | - | 18dB | 1.290" L x 1.400" W (32.77mm x 35.56mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 74Ohm | 300Hz ~ 3.4kHz | 1dB | 0.500" (12.70mm) | 600 | 2dB | Through Hole | - | - | 18dB | 1.290" L x 1.400" W (32.77mm x 35.56mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | 66.5Ohm | 300Hz ~ 3.4kHz | 0.5dB | 0.650" (16.51mm) | 600 | 1.25dB | Through Hole | - | - | 26dB | 1.650" L x 1.340" W (41.91mm x 34.04mm) | PC Pin | Voice | - | - | |
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Hammond Manufacturing
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- | - | - | - | 1.070" (27.18mm) | - | - | Through Hole | - | - | 36dB | 1.730" L x 1.480" W (43.94mm x 37.59mm) | PC Pin | Voice | - | - | |
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CLASSIC
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Hammond Manufacturing
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- | 58Ohm | 20Hz ~ 20kHz | ±1dB | 1.000" (25.40mm) | 600, 150/150 | 0.8dB Typ | Chassis Mount | - | 10dB | 30dB Typ | 1.250" Dia (31.75mm) | Screw Terminal | - | 1:1, 1:2, 1:4 | 500Vrms | |
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CLASSIC
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Hammond Manufacturing
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- | 72.4Ohm | 20Hz ~ 20kHz | ±1dB | 1.000" (25.40mm) | 600CT | 1dB Typ | Chassis Mount | - | 10dB | 22.5dB Typ | 1.250" Dia (31.75mm) | Screw Terminal | - | 2:1 | 500Vrms | |
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Hammond Manufacturing
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- | 89.7Ohm | 20Hz ~ 20kHz | ±1dB | 1.000" (25.40mm) | 1k | 1dB Typ | Chassis Mount | - | 10dB | 20dB Typ | 1.250" Dia (31.75mm) | Screw Terminal | - | 1:1 | 500Vrms |
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