Lundahl LL1517

• 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:9.2Ω
• Static resistance of each secondary:9.5Ω
• Leakage inductance of secondaries (sec. in series):0.3 mH
• No-load impedance:Typically > 600Ω@ 50 Hz, +20 dBU
• Optimum source impedance:Minus 18Ω(See above)
• Balance of output (according to IRT, source < 10Ω , Load 600Ω> 60 dB
• Maximum output level before saturation (sec. in series, load 600Ω)+ 24 dBU @ 30 Hz
• Distortion (achieved with mixed feedback drive circuit, load 600Ω)< 0.03 % @ 20 dBU, 30Hz
• Frequency response (source 10Ω load 600Ω):10 Hz – 80 kHz +/- 0.3 dB
• Loss across transformer (at midband with 600Ω load):0.3 dB
• Isolation between primary and secondary windings / between windings and core:4 kV / 2 kV