LL1550 Lundahl microphone trasformer - applicazioni speciali ingresso - nucleo amorfo

LL1550 is an audio transformer with rather high turns ratio and with a variety of connection alternatives. The transformer is built up from two coils, each with a secondary winding surrounded by shields and two primary windings. This structure results in an excellent frequency response. All winding ends are available on the pins. The transformer is ideally used in applications where the high turns ratio is utilized, e.g. in a D.I. box. The LL1550 is made with amorphous core material. As this type of core does not store energy (unlike conventional mu-metal cores) the low frequency resonance with external capacitors is practically eliminated. Refer to the back side of this sheet for termination alternatives.