Lundahl Amorphous core choke, LL1638-4H-AM

Amorphous core choke LL1638

The LL1638 is a 2 coils choke for tube amplifier anode supply. The choke is available with different core air-gap, which results in different inductance and DC current capability. The coil is wound using our standard high internal isolation technique with isolation foil between each copper layer. The core is an audio amorphous core of our own production.

The obvious measurable difference between our silicon-iron cores and amorphous cores is that the saturation flux for the amorphous core is approximately 33% less than for the silicon-iron counterpart. This is caused partly by a lower saturating flux level, partly by a smaller fill-factor due to the thickness of the amorphous sheets.

Weight: 1.35 kg
Static resistance of each winding: 18 ?
Isolation between windings / between windings and core: 4 kV / 2 kV