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전기음향:electric_circuit:passive_component:transformer:ll1517

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전기음향:electric_circuit:passive_component:transformer:ll1517 [2026/07/07] – 제거됨 - 바깥 편집 (알 수 없는 날짜) 127.0.0.1전기음향:electric_circuit:passive_component:transformer:ll1517 [2026/07/07] (현재) – ↷ 링크가 이동 작업으로 인해 적응했습니다 84.75.148.30
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 +======LL1517======
  
 +**Lundahl LL1517, Audio Output Transformer**
 +
 +LL1517 is an audio output transformer for balanced or unbalanced drive. The transformer is built from two threesection coils, with primaries and secondaries separated by electrostatic shields, and a audio C-core of our own
 +production. The transformer is housed in a mu-metal housing.
 +The LL1517 has sufficient low copper resistance to meet broadcast specifications in a conventional drive
 +configuration, but is (as all output transformers) ideally used with mixed feedback drive circuits. (See separate paper
 +for mixed feedback design principles).
 +
 +  * Turns ratio: 1 + 1 : 1 + 1
 +  * Spacing between pins: 5.08mm(0.2")
 +  * Spacing between rows of pins: 35.56mm(1.4")
 +  * Weight: 105g
 +  * Core: Audio C-core
 +  * Housing: Mu-metal
 +  * Rec. PCB hole diameter: 1.5mm
 +  * Static resistance of each primary: 9.2Ω
 +  * Static resistance of each secondary: 9.5Ω
 +  * Leakage inductance of secondaries(sec. in series): 0.3mH
 +  * No-load impedance: Typically >600Ω@50Hz, +20dBU
 +  * Optimum source impedance: Minus 18Ω(See above)
 +  * Balance of output(according to IRT, source <10Ω, Load 600Ω): >60dB
 +  * Maximum output level before saturation(sec. in series, load 600Ω): +24dBU@30Hz
 +  * Distortion(achieved with mixed feedback drive circuit, load 600Ω): <0.03%@20dBU, 30Hz
 +  * Frequency response(source 10Ω load 600Ω):10Hz ~ 80kHz +/- 0.3dB
 +  * Loss across transformer (at midband with 600Ω load): 0.3dB
 +  * Isolation between primary and secondary windings/between windings and core: 4kV/2kV
 +
 +{{전기음향:electric_circuit:passive_component:transformer:20240410-004047.png}}
 +
 +{{전기음향:electric_circuit:passive_component:transformer:20240410-012612.png}}
 +
 +{{tag>트랜스포머}}
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