The transformer consists of two coils, each with one primary and one secondary winding separated by an electrostatic shield, and a high permeability mu-metal core. The high impedance windings are wound using a special low capacitance winding technique. The transformer is encapsulated in a mu-metal case for magnetic shielding. For best performance, the high impedance side of the transformer (5 + 5) should be connected in series. Pin layout (viewed from component side) and winding schematics: Turns ratio: 1 + 1 : 5 + 5Length: 38mmWidth: 23mmHeight above PCB: 16mmSpacing between pins: 5.08 mm (0.2")Spacing between rows of pins: 27.94 mm (1.1")Offset of earth pin from adjacent row: 2.54 mm (0.1")Weight: 46 gRecommended PCB hole diameter: 1.5 mmStatic resistance of each primary (pins 5-6 and 7-8): 650 OhmStatic resistance of each secondary (pins 1-2 and 3-4): 17 OhmFrequency response (reference 1.0 kHz)10:1, source 100 kO , secondary open: 20 Hz – 20 kHz +0 / -3 dB 10:1, source 100 kO, load 1 kO 10 Hz – 45 kHz +0 / -2 dB1:10, source 200 O, secondary open 10 Hz – 80 kHz +/- 1dBDistortionFor practical reasons measured in 1:10 configuration. -5 dBU input level, +14 dBU output level< 0.1%="" thd="" @="" 50="">Source 150O, load 10k (Audio Precision portable) +7 dBU input level, +26 dBU output level < 1%="" thd="" @="" 50="">Self resonance point: None detected in above configurationsIsolation between windings/ between windings and shield: 4 kV / 2 kV
All reviews:
Simple and awesome! thanks to don-audio for the great support. The wiring of the ll1935 was pretty simple and i am just amazed that something that simple can sound so good! It brings out all the subtle details. Playing my JSM100-VT... Wow!
thanks to don-audio for the great support. The wiring of the ll1935 was pretty simple and i am just amazed that something that simple can sound so good! It brings out all the subtle details. Playing my JSM100-VT... Wow!
perfect for passive di box perfect for passive di box
perfect for passive di box
DI Box mit LL1935 ich habe mir eine kleine DI Box mit dem Lundahl LL1935 Trafo für meinen Avalon Mic Preamp gelötet. Das Ergebnis lässt sich hören, ich bin sehr zufrieden mit dem Trafo, der das Signal gegenüber trafolosen DI Boxen akustisch hervorragend überträgt. Lano
ich habe mir eine kleine DI Box mit dem Lundahl LL1935 Trafo für meinen Avalon Mic Preamp gelötet. Das Ergebnis lässt sich hören, ich bin sehr zufrieden mit dem Trafo, der das Signal gegenüber trafolosen DI Boxen akustisch hervorragend überträgt. Lano
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