LL1555 is an audio output transformer for balanced drive. The winding arrangement is such that, connected as shown below, each secondary winding is surrounded by cold primary winding ends. The transformer is ideally used with a mixed feedback drive circuit (refer to our separate sheet). The secondaries can be connected in parallel (for low output impedance) or in series. The LL1555 is made with an audio C-core of our own production and is housed in a mu-metal housing.
Turns ratio: 1 + 1 + 1 + 1 : 1 + 1
Dims: (Length x Width x Height above PCB (mm)) 33 x 26x 20
Spacing between pins: 2.54 mm (0.1")
Spacing between rows of pins: 22.86 mm (0.9")
Weight: 59 g
Rec. PCB hole diameter: 1.5 mm
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