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Руководство пользователя LUNDAHL LL1660S AM. 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 Tube Amplifier Phase Splitting Interstage Transformer LL1660S LL1660S is a version of LL1660 with internal Faraday shields to improve balance in phase splitting interstage applications. The transformer is available with different core air gap for different driving tubes. 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 LL1660S is assembled with a small core air gap to allow for some DC current unbalance. For the L1660S, the core air gap is chosen such that the denoted DC current (18mA for a LL1660S/18mA) generates a no signal core flux density of 0.9 Tesla when used with windings 2 through 10 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 15 10 9 8 7 5 4 3 2 C 3 16 4 x M3 13 Mounting holes B 56 4 73 Bottom view 9 18 B 21 20 18 16 15 13 21 8 C 10 20 A 53 61 7 Distance between pins 0.2” (5.08mm) Distance between rows of pins 1.8” (45.7 mm) Pin diameter 1.2 - 1.4 mm Weight Turns ratio Static resistance, Static resistance, Static resistance, winding A winding B winding C 0.75 Kg 1+1+1+1 : 2.25+2.25 315 W 240 W 625 W Max. current through any single section: 50 mA Isolation between primary and secondary windings / between windings and core: 4 kV / 2 kV Type LL1660S/PP LL1660S/10mA Connection Alt A Alt B PP to PP Interst. SE to PP Interst. 2.25+2.25 : 2+2 2.25 : 2 + 2 Primary DC current for - 18 mA 0.9 Tesla Primary Inductance 290H 42H Freq. Response (+/-1dB) 20 Hz – 25 kHz 25 Hz - 30 kHz @ source impedance (*) 15kW 3.5kW Secondaries open Max output 2 x 260V r.m.s. 220 V r.m.s. voltage @ 30 Hz R030220
LUNDAHL TRANSFORMERS Tube Amplifier Interstage Transformer LL1660S Connection Alternatives V+ 21 10 20 9 To grid 8 18 7 16 5 15 4 3 To grid 13 2 Alt. A 2.25+2.25 : 2+2 Push-Pull to Push-Pull Interstage V+ 21 10 To grid 20 9 8 18 7 16 5 To grid 15 4 3 13 2 Alt. B Phase Indicator 2.25 : 2 + 2 Single End to Push Pull Interstage