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Руководство пользователя LUNDAHL LL1671SE 30 mA. Основные функции, характеристики и условия эксплуатации изложены на 2 страницах документа в pdf формате.
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Tibeliusgatan 7 International Domestic LUNDAHL S-761 50 NORRTALJE Phone +46 - 176 13930 0176-13930 TRANSFORMERS SWEDEN Fax +46 - 176 13935 0176-13935 High Current Tube Amplifier Interstage / Line Output Transformer LL1671 LL1671 is a high current interstage / line output transformer for tube amplifiers. The transformer is available with various core air gaps optimised for PP or SE drives. The transformer is wound with a special low capacitance winding technique to achieve best high frequency performance. The transformer has a special high flux, low distortion audio C-core of our own production. The LL1671PP is assembled with a small core air gap to allow for some DC current unbalance. For the S.E. versions of the LL1671, the core air gap is chosen such that the denoted DC current (30mA for a LL1671/30mA) generates a no signal core flux density of 0.9 Tesla when used with all primaries in series. This leaves a flux density swing of 0.7 T for the signal. Winding schematics, physical dimensions, pin and mounting hole layout (all dimensions in mm) 36 2 A 5 13 10 9 8 7 5 4 3 2 C 3 16 4 x M3 Mounting holes B 56 4 73 Bottom view 9 B 21 18 16 13 21 8 C 10 18 A 53 61 7 Weight Turns ratio Static resistance, Static resistance, Static resistance, Winding A winding B winding C 0.75 Kg 1+1+1+1 : 2+2 88 W 69 W 156 W Max. current through any single section: 100 mA Isolation between primary and secondary windings / between windings and core: 4 kV / 2 kV Type LL1671 PP LL1671 PP LL1671/30mA LL1671/30mA Connection Alt M?? Alt N Alt Q Alt S PP to PP Interst. PP Line output SE Line Output SE to SE Interst. 2+2 : 2+2 2+2 : 1 4 : 1 1 : 1 Primary DC current for - - 30 mA 30 mA 0.9 Tesla Primary Inductance 80 H 80 H 35 H 35 H Freq. Response (+/-1dB) 20 Hz – 25 kHz 15 Hz – 50 kHz 30Hz - 30 kHz @ source impedance (*) 5kW 5kW 3 kW Secondaries open Max output 2 x 150V r.m.s. 75V r.m.s. 33 V r.m.s. 130 V r.m.s. voltage @ 30 Hz Type LL1671/30mA LL1671/30mA (*) The source impedances used in Connection Alt T Alt V the tables indicates a recommended SE to SE Interst. SE to PP Interst. upper limit, unless freq. response can 1 : 2 1 : 1 + 1 be compromised. Primary DC current for 60 mA 60 mA At lower source impedance resonance 0.9 Tesla peaking will occur. It can be reduced Primary Inductance 10 H 10 H using secondary load resistors. Freq. Response (+/-1dB) 40 Hz - 25 kHz 40 Hz - 25 kHz @ source impedance (*) 1 kW 1 kW Secondaries open Max output 130 V r.m.s. 130 V r.m.s. voltage @ 30 Hz R030304
LUNDAHL TRANSFORMERS Tube Amplifier Interstage Transformer / Line Output Transformer LL1671 Connection Alternatives V+ V+ 21 10 9 21 10 8 To grid 9 18 7 8 18 7 16 5 4 16 6 3 To grid 5 13 2 4 13 3 Alt. M?? (new!) Alt. N 2+2 : 2+2 2+2 : 1 Push-Pull to Push-Pull Interstage Push-Pull to Line Output V+ V+ 21 10 2 13 9 3 8 4 18 7 5 16 16 5 7 18 4 8 3 9 13 2 10 21 To grid Alt. Q Alt. S 4 : 1 1 : 1 Single End to Line Output Single End to Single End Interstage V+ V+ To grid 2 13 21 10 3 9 4 8 5 16 18 7 7 18 16 5 To grid 8 4 9 3 10 21 13 2 To grid Alt. V (new) Alt. T 1 : 1 + 1 1 : 2 Single End to Push Pull Interstage Single End to Single End Interstage Phase Indicator