Lundahl Moving coil input transformer, LL1941

Amorphous Core Moving Coil Input Transformer LL1941

LL1941 is a high turns ratio version of our LL1931 moving coil step-up transformer. The LL1941 transformer combines our unique uncut amorphous cobalt core and our dual coil structure with Cardas high purity copper wire in an oversized design. The objective is to provide the best possible MC transformer, cost-no-object, for low output MC cartridges. The dual-coil structure greatly improves immunity to external magnetic fields from power supplies, motors etc. The transformer is housed in a mu-metal can.

Turns ratio: 1 + 1 : 16 + 16

Dimensions (L x W x H above PCB, in mm) 43 x 28 x 22
Spacing between pins 5.08 mm (0.2")
Spacing between rows of pins 30.5 mm (1.2")
Rec. PCB hole diameter: 1.5 mm
Weight: 90 g
Static resistance of each primary: 0.8 ?
Static resistance of each secondary: 105 ?
Frequency response
(serial connection, source 10 ?, no load / secondaries open): 10 Hz -- 100 kHz +/- 1.0 dB
Isolation between windings/ between windings and core: 3 kV / 1.5 kV