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Руководство пользователя LUNDAHL LL9226. 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 Moving Coil Input Transformer LL9226 LL9226 is an MC transformer based on (and pin compatible with) our classic LL9206, but with reduced copper resistance and level capability. The new design has resulted in an even better frequency response but still with enough no load impedance to maintain the LF bandwidth. The transformer is built up from two coils, each coil with one secondary winding surrounded by two primary windings. Advantages with this structure are excellent frequency response and high immunity to surrounding magnetic fields. All winding ends are available on the pins. Thus, the transformer can be used with a set of different turns ratios. The LL9226 core is our cobalt based uncut amorphous strip core. The transformer is housed in a mu metal can. Turns ratio: 1 + 1 + 1 + 1 : 10 + 10 Dims: (Length x Width x Height above PCB (mm)) 30 x 22.5 x 14.5 Pin Layout (viewed from pins side) and windings schematics: 1 2 9 3 10 1 9 4 10 2 11 3 4 8 5 13 6 14 7 16 7 15 8 16 6 15 5 Can + Core 13, 14 Spacing between pins: 2.54 mm (0.1") Spacing between rows of pins: 22.86 mm (0.9") Weight: 29 g Rec. PCB hole diameter: 1.5 mm Static resistance of each primary (average): 5 ? Static resistance of each secondary (average): 130 ? Frequency response 10 Hz -- 50 kHz +/- 1 dB (@ -10 dBU, Connection “A”, source 50? , load 100 k?) : 5 Hz -- 100 kHz +/- 1.5 dB Distortion (primaries connected in series, source impedance 40? ): < 0.5% @ -2 dBU, 50 Hz Primary no load impedance @ 0 dBU, 50 Hz, all in series: 3 k? typically Core / Can: Amorphous Strip Core / Mu metal can Isolation between windings / between windings and core: 3 kV / 1.5 kV Turns ratio and possible use at different termination alternatives. Application hint: Termination alternatives are shown on the next page As the LL9226 does not have Termination Turns Copper Resistance Suggested use for best Faraday shields, both sides of Alternative ratio prim/sec frequency response the transformer should have a common ground reference. A 1:5 20 ? / 260 ? MC cartridge < 100 ? B 1:5 5 ? / 65 ? Not recommended C 1:10 5 ? / 260 ? MC cartridge < 50 ? D 1:10 1 ? / 65 ? Not recommended E 1:20 1 ? / 260 ? MC cartridge < 25 ? R090828
LL9226 Termination Alternatives (Left side is input if not stated otherwise) (Pins side view) 9 1 9 1 10 2 10 2 A 11 3 11 3 4 4 CENTER TAP 13 5 A 13 5 14 6 14 6 15 7 15 7 16 8 16 CT 8 1 9 1 9 2 10 2 10 3 11 3 B 11 4 B CT 4 5 13 5 CENTER TAP 13 6 14 6 14 7 15 7 15 8 16 8 16 1 9 1 9 2 10 2 10 3 11 3 C 11 4 C CT 4 5 13 5 13 6 14 6 CENTER TAP 14 7 15 7 15 8 16 8 16 1 9 2 10 1 9 3 11 2 10 11 4 3 5 D 13 4 6 14 5 E 13 7 15 6 14 8 16 7 15 8 16