The LL1570 is a very high quality general purpose audio transformer for low turns ratio mic input, for ground isolation, balanced-to-unbalanced conversion and for splitting 1:1+1. By careful design, the capacitive coupling between the different parts of the transformer is kept to a minimum. The three-section winding structure used in the LL1570 results in a very high bandwidth. The transformer is built up from two coils, each with primary and secondary windings separated by electrostatic shields, and a high permeability mu-metal core.
In the LL1570XL, the core is about 45% larger than in the LL1570, resulting in a high signal level capability.
Turns ratio: 1 + 1 : 1 + 1
Dimensions (Max. L x W x H above PCB(mm)): 38 x 24 x 20.5
Weight: 65 g
Frequency response (source 600ohms, load as above, serial-serial connections): 10 Hz -- 200 kHz +/- 0.5 dB
Self resonance point : > 250 kHz
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