A comparison of some well known transformers, some of them also used for moving coil cartridges.
Measured at source impedance 5Ω / input impedance 20KΩ +4dBu -60dBFS
Jørgen Schou Type 0.32M No. 40
Primary (black/yellow)
100Hz: 417 mH
1kHz: 91.3 mH
Secondary induction (green/red)
100Hz: 693 H
1kHz: 157 H
Leakage induction
100Hz: 243 uH
1kHz: 222 uH
Primary DC 100Hz: 158 Ω
primary DC 1Khz: 1150 Ω
Secondary DC 100Hz: 1139 kΩ
Secondary DC 1Khz: 2.2 kΩ
Lampidan LXC-9755
Primary induction
100Hz: 477 mH
1kHz: 142 mH
Primary DC 100Hz: 148 Ω
Primary DC 1Khz: 885 Ω
leakage induction
100Hz: 1030 uH
1kHz: 584 uH
Secondary induction
100Hz: 36.5 H
1kHz: 21.9 H
Secondary DC 100Hz: 72.1 kΩ
Secondary DC 1Khz: 142.5 kΩ
0,32B 5524 Bang and Olufsen
Primary induction
100Hz: 53.8 mH
1kHz: 21.3 mH
Primary DC 100Hz: 15.9 Ω
Primary DC 1Khz: 103 Ω
leakage induction
100Hz: 62 uH
1kHz: 50.5 uH
Secondary induction
100Hz: 117 H
1kHz: 78.6 H
Secondary DC 100Hz: 356.5 kΩ
Secondary DC 1Khz: 663 kΩ
0.32B 5413 Bang and Olufsen
Primary induction
100Hz: 548 mH
1kHz: 220 mH
Primary DC 100Hz: 115.8 Ω
primary DC 1Khz: 1639 Ω
leakage induction
100Hz: 690 uH
1kHz: 594 uH
Secondary induction
100Hz: 299 H
1kHz: 127 H
Secondary DC 100Hz: 839 kΩ
Secondary DC 1Khz: 1580 kΩ
NTE-10/3 1:3
Primary induction
100Hz: 1566 mH
1kHz: 479 mH
Primary DC 100Hz: 465 Ω
Primary DC 1Khz: 3.15 kΩ
Leakage induction
100Hz: 1070uH
1kHz: 633uH
Secondary induction
100Hz: 21.4
1kHz: 12 H
Secondary DC 100Hz: 30.4 kΩ
Secondary DC 1Khz: 71.6 kΩ
NTE-10/3 1:10 (blue/black)
Primary induction
100Hz: 1566 mH
1kHz: 479 mH
Primary DC 100Hz: 465 Ω
Primary DC 1Khz: 3.15 kΩ
Leakage induction
100Hz: 1070 uH
1kHz: 633 uH
Primary DC 100Hz: 465 Ω
Primary DC 1Khz: 465 Ω
Secondary DC 100Hz: 109 kΩ
Secondary DC 1Khz: 245 kΩ
Beyer Dynamic TR/BV 352 010 005
Primary induction Red/black
100Hz: 5.4 H
1kHz: 983 mH
Primary DC 100Hz: 2.8 kΩ
Primary DC 1Khz: 10.17 kΩ
leakage induction
100Hz: 2.97 mH
1kHz: 2.17 mH
Secondary induction Yellow/blue
100Hz: 626 H
1kHz: 340 H
Secondary DC 100Hz: 868 kΩ
Secondary DC 1Khz: 1402 kΩ
Beyer Dynamic TR/BV 310 101 031
1:1
Primary induction 1/4
100Hz: 17.7 H
1kHz: 5.54 H
Primary DC 100Hz: 12.5 kΩ
primary DC 1Khz: 26.1 kΩ
leakage induction
100Hz: 8.9 mH
1kHz: 4.1 mH
Secondary induction 5/7
100Hz: 18.8 H
1kHz: 6.15 H
Secondary DC 100 Hz: 14 kΩ
Secondary DC 1 Khz: 29 kΩ
Lundahl LL1530 1:3.5
Primary induction
100Hz: 76H
1kHz: 46.7H
Primary DC 100Hz: 55.6 KΩ
Primary DC 1Khz: 104.5 KΩ
leakage induction
100Hz: 4.55mH
1kHz: 3.7mH
Secondary
100Hz: 533 H
1kHz: 71 H
Secondary DC 100Hz: 708 Ω
Secondary DC 1Khz: 1280K Ω
Lundahl LL1530 1:7
Primary induction
100Hz: 300 mH
1kHz: 283 mH
Primary DC 100Hz: 92Ω
Primary DC 1Khz: 290Ω
leakage induction
100Hz: 301 mH
1kHz: 283 mH
Secondary induction
100Hz: 533 H
1kHz: 71 H
Secondary DC 100Hz: 693Ω
Secondary DC 1Khz: 1307KΩ