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Lundahl Interstage transformer, LL1660-PP

LL1660-PP

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Lundahl Interstage transformer, LL1660-PP

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129,11 €

105,83 € tax excl.***

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Tube Amplifier Interstage Transformer / Line Output Transformer LL1660-PP

LL1660 is an interstage / line output transformer for tube amplifiers. The transformer is available with different core air gap 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 LL1660PP is assembled with a small core air gap to allow for some DC current unbalance. For the S.E. versions of the LL1660, the core air gap is chosen such that the denoted DC current (18mA for a LL1660/18mA) 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.

Weight: 0.75 Kg
Turns ratio: 1+1+1+1 : 2.25+2.25
Static resistance, winding A: 315 W
Static resistance, winding B: 240 W
Static resistance, winding C: 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

LL1660 PP

LL1660 PP

Connection

Alt M?? PP to PP Interst. 2.25+2.25 : 2+2

Alt N PP Line output 2.25+2.25 : 1

Primary Inductance

290H

290H

Freq. Response (+/-1dB) @ source impedance (*) Secondaries open

20 Hz 25 kHz 15kW

16 Hz 30 kHz 15kW

Max output voltage @ 30 Hz

2 x 260V r.m.s.

130V r.m.s.

(*) The source impedances used in the tables indicates a recommended upper limit, unless freq. response can be compromised. At lower source impedance resonance peaking will occure. It can be reduced using secondary load resistors.

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Lundahl Interstage transformer, LL1660-PP

Lundahl Interstage transformer, LL1660-PP

Lundahl Interstage transformer, LL1660-PP