The LL1927A is a very high turns ratio transformers for active ribbon microphones. The transformer has an uncut amorphous strip core and is built up from two coils of each four sections for low leakage inductance.
Turns Ratio: 1 + 1 : 55 + 55
Dims: (Length x Width x Height above PCB (mm)) 30 x 22.5 x 14.5
Spacing between pin positions: 2.54 mm (0.1")
Spacing between rows of pins: 22.86 mm (0.9")
Weight: 27 g
Rec. PCB hole diameter: 1.5 mm
Housing: Mu metal
Core: High mu amorphous strip core
Static resistance of each primary (average): 0.05 ohms
Static resistance of each secondary: 182 ohms
Frequency response (Source 0.3 ohms, load 10k ohms. 10Hz – 70kHz +/- 1dB
Connection 1 : 110. Secondary signal level 0dBU)
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