LL9206
Moving Coil Input Transformer
The transformer is built up from two coils, each coil with one secondary winding surrounded by two primary windings. This structure results in an excellent frequency response. All winding ends are available on the pins. Thus, the transformer can be used with a set of different turn’s ratios.
The LL9206 is made with amorphous core material. As this type of core does not store energy (unlike e.g. conventional mu-metal cores) the low frequency resonance with external series capacitors is practically eliminated.
| Spacing between pins | Spacing between rows of pins | Weight: | Recommended PCB hole diameter |
| 2.54mm (0.1") | 22.86 mm (0.9") | 27g | 1.5mm |
| Static resistance of each primary : | 10 Ω |
| Static resistance of each secondary : | 395 Ω |
| Self resonance point | > 250 kHz |
| Frequency response (@ -10 dBU, all in series. Source 50Ω , load 100 kΩ) | 10 Hz ~ 25 kHz ± 1 dB |
| 10 Hz ~ 90 kHz ± 1 dB | |
| Distortion (primaries connected in series, source impedance 50Ω) | < 0.5% @ -2dBU, 50Hz |
| Primary no load impedance @ 0 dBU, 50 Hz, all in series | 8 kΩ typically |
| Core / Can : | Amorphous Strip Core / Mu metal can |
| Isolation between windings / between windings and core : | 3 kV / 1.5 kV |
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