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Lundahl LL1517 Output audio transformer

Item number: LL1517

Category: Output Transformers


80,62 €

including 19% VAT., plus shipping (kleinteile)

Recommended retail price: 98,95 €
(You save 18.52%, that is 18,33 €)
Available now!

Shipping time: 2 - 3 workdays



LL1517 is an audio output transformer for balanced or unbalanced drive. The transformer is built from two three section coils, with primaries and secondaries separated by electrostatic shields, and a audio C-core of our own production. The transformer is housed in a mu-metal housing. The LL1517 has sufficient low copper resistance to meet broadcast specifications in a conventional drive configuration, but is (as all output transformers) ideally used with mixed feedback drive circuits. (See separate paper for mixed feedback design principles).

Turns ratio: 1 + 1 : 1 + 1

Technical Details:

  • Dims (Length x Width x Height above PCB (mm)):                                                             47 x 34 x 18

  • Spacing between pins:                                                                                                          5.08 mm (0.2")

  • Spacing between rows of pins:                                                                                            35.56 mm (1.4")

  • Weight:                                                                                                                                  105 g

  • Core:                                                                                                                                      Audio C-core

  • Housing:                                                                                                                                Mu-metal

  • Rec. PCB hole diameter:                                                                                                     1.5 mm

  • Static resistance of each primary:                                                                                       9.2 ohms ?

  • Static resistance of each secondary:                                                                                    9.5 ohms??

  • Leakage inductance of secondaries (sec. in series):                                                            0.3 mH

  • No-load impedance:                                                                                                              Typically > 600 ohms @ 50

                                                                                                                                                          Hz, +20 dBU

  • Optimum source impedance:                                                                                               Minus 18 ohms?

  • Balance of output (according to IRT, source < 10 ohms  , Load 600 ohms??             ? > 60 dB

  • Maximum output level before saturation (sec. in series, load 600 ohms )                         + 24 dBU @ 30 Hz

  • Distortion (achieved with mixed feedback drive circuit, load 600 ohms )                            < 0.03 % @ 20 dBU, 30Hz

  • Frequency response (source 10 ohms ,load 600 ohms ):                                                      10 Hz -- 80 kHz +/- 0.3 dB

  • Loss across transformer (at midband with 600 ? load):                                                     0.3 dB

  • Isolation between primary and secondary windings / between windings and core:       4 kV / 2 kV

 


Application: Line Output
Shipping weight: 0,10 Kg
Product weight: 0,11 Kg

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