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Lundahl LL1690 Audio transformer

154,28 €
(129,65 € excl. vat)
including VAT., plus shipping
  • Must be ordered. Ready for shipment in 7 days
  • Shipping time: 8 - 9 workdays
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Category
Manufacturer
Item no.
  • LL1690
Product weight
  • 0,10 kg
Shipping weight
  • 0,10 kg
Compliance

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Description

LL1690 is a high-level line input transformer with an uncut cobalt-based amorphous strip core.
The transformer is designed for high end audio applications such as tube amplifier line input with or without phase splitting. The windings are arranged to give a high degree of symmetry if the transformer is used for phase splitting. The dual-coil structure also greatly improves immunity to external magnetic fields from e.g. power supplies and motors. Primary and secondary windings are separated by electrostatic shields.. The transformer is housed in a mu-metal can.
Suitable transformer for 1:1 applications with 600 ohm source and at least 10K reflecting impedance output 600/10K.
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Average product review: Average Rating: 5/55

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  1. Average Rating: 5/55 Alain B. Wrote at 12.03.2023
    Good transformers for interconnect.
    LL1588/LL1592/LL1590 are good transformers for audio signal, which can be used in high-end audio system.
    I used these transformers for galvanic isolation and filtering like Jeff Rowland.
    Distortion is extremely low and Lundahl is a serious supplier for such items.

    Transformers are still limited to low frequencies.
    These three transformers support about 7Vrms at 20Hz without visible distortion on a sinusoidal signal.

    For the perfectionist guys, I suggest adding an RC element to have flat bandwidth and good transient response, and maybe a series capacitor as well.

    The question remains: mu-metal core or cobalt-based core?
    Mu-metal seems safer...
* All prices are final prices in EUR including the valid value added tax/VAT.
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