Lundahl LL1673-20H Choke For Tube Amplifiers 100 mA | 20 H

Highlights of the Lundahl LL1673-20H

• Two-coil choke for tube amplifier anode supply use
• 20 H inductance with coils in series at 100 mA recommended DC current
• 5 H inductance with coils in parallel at 200 mA recommended DC current
• Suitable for choke input and capacitor input applications
• High internal isolation with isolation foil between each copper layer
• Audio C-core construction with 4 kV winding-to-winding isolation

Product details Lundahl LL1673-20H

Lundahl LL1673-20H Choke for tube amplifier anode supply 100 mA 20 H

The Lundahl LL1673-20H is designed for high-voltage tube amplifier power supply work, specifically for anode supply filtering. Its two-winding construction allows flexible connection options, making it suitable for both choke input and capacitor input supply designs.

With the coils connected in series, the LL1673-20H provides 20 H inductance with a recommended DC current of 100 mA and a saturating current of 145 mA. In parallel connection, it provides 5 H inductance with a recommended DC current of 200 mA and a saturating current of 290 mA.

The winding uses Lundahl’s high internal isolation technique, with isolation foil between each copper layer. Isolation is rated at 4 kV between windings and 2 kV between windings and core, supporting reliable use in demanding tube amplifier power supply circuits and other high-voltage audio components.

The LL1673-20H is built on an audio C-core produced by Lundahl and has a weight of 1.35 kg. Each winding has a static resistance of 30 Ω, and the choke is specified for a maximum ripple voltage of 400 V rms at 100 Hz at the recommended DC current in series connection.