Marinair LO1166 audio transformer data
1
Audio Transformer Data Transformer Make / Model Marinair LO1166/A Test Circuit Notes Voltage Ratio Pri/Sec (approx turns ratio) 1 : 1.68 1 Test circuit 1 Calculated Impedance Ratio 1 : 2.82 Impedance Ratio = Voltage Ratio squared 150 : 423 Nominal Impedance Ratio Voltage Gain at 2 KHz +4.44 dB 1 Sine wave input level <= Max Level, Unloaded secondary Voltage Gain / Deviation at 20 Hz +4.30 -0.1 dB 1 Voltage Gain | Deviation from 2K Level, Unloaded secondary Voltage Gain / Deviation at 20 KHz +4.39 -0.1 dB 1 Voltage Gain | Deviation from 2K Level, Unloaded secondary HF Peak Frequency 129.4K Khz 1 Unloaded secondary. Subject to test probe capacitance. Gain at HF Peak +4.1 dB 1 Unloaded secondary Usable Frequency Range (+/- 3 dB ref 2 KHz level) <10 Hz to 150 KHz 1 Lower limit of testing = 10 Hz, Unloaded secondary Max Level at 20 Hz (1% THD) + 31.4 dBu 1 Unloaded secondary Secondary Loading Loss 1.1 dB at 600 Ohms Unloaded voltage gain minus loaded voltage gain Primary Secondary Configuration Series Series Rated Impedance (ohms) 150 600 In italics if calculated, non-italics if mfg specified DC Resistance (ohms) 14.2 43.6 2 Impedance at 20 Hz (ohms) 255 700 3 Opposite winding unloaded Calculated Inductive Reactance 241 656 Impedance minus DC Resistance Calculated Inductance (Henries) 1.9 7.0 Calculated from Inductive Reactance at 20 Hz Test Circuit 1 Test Circuit 2 Test Circuit 3
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output transformer used in famous 1073 NEVE mic preamp
Transcript of Marinair LO1166 audio transformer data
Audio Transformer Data
Transformer Make / Model Marinair LO1166/A Test Circuit Notes
Voltage Ratio Pri/Sec (approx turns ratio) 1 : 1.68 1 Test circuit 1
Calculated Impedance Ratio 1 : 2.82 Impedance Ratio = Voltage Ratio squared
150 : 423 Nominal Impedance Ratio
Voltage Gain at 2 KHz +4.44 dB 1 Sine wave input level <= Max Level, Unloaded secondary
Voltage Gain / Deviation at 20 Hz +4.30 -0.1 dB 1 Voltage Gain | Deviation from 2K Level, Unloaded secondary
Voltage Gain / Deviation at 20 KHz +4.39 -0.1 dB 1 Voltage Gain | Deviation from 2K Level, Unloaded secondary
HF Peak Frequency 129.4K Khz 1 Unloaded secondary. Subject to test probe capacitance.
Gain at HF Peak +4.1 dB 1 Unloaded secondary
Usable Frequency Range (+/- 3 dB ref 2 KHz level) <10 Hz to 150 KHz 1 Lower limit of testing = 10 Hz, Unloaded secondary
Max Level at 20 Hz (1% THD) + 31.4 dBu 1 Unloaded secondary
Secondary Loading Loss 1.1 dB at 600 Ohms Unloaded voltage gain minus loaded voltage gain
Primary Secondary
Configuration Series Series
Rated Impedance (ohms) 150 600 In italics if calculated, non-italics if mfg specified
DC Resistance (ohms) 14.2 43.6 2
Impedance at 20 Hz (ohms) 255 700 3 Opposite winding unloaded
Calculated Inductive Reactance 241 656 Impedance minus DC Resistance
Calculated Inductance (Henries) 1.9 7.0 Calculated from Inductive Reactance at 20 Hz
Test Circuit 1 Test Circuit 2
Test Circuit 3
