Mains transformers

Lundahl manufactures a limited range of C-core mains transformers, primarily for tube amplifiers. These transformers are best used with bridge rectifier circuits (four diodes), but some transformers can also be used with full wave rectifier circuits. ? The hybrid power supply principle provides a bridge rectifier circuit using classical tube rectifier tubes in combination with modern diodes. The transformer primaries are connected in series for 210 ? 250V and in parallel for 105 ? 125V. Secondary voltages are calculated for 230V / 115V primary voltage. The secondary voltage listed are no-load voltage. Voltage drop because of load can be calculated from transformer copper resistance and load current. For optimal use, about 75% of power should be taken from secondary 1. In Lundahls mains transformer range, a small deliberate C-core air-gap is used to prevent from core saturation caused by any DC unbalance in the mains outlet.

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Lundahl LL1648 mains transformer for tube amplifiers

Must be ordered. Ready for shipment in 14 days
Shipping time: 15 - 16 workdays
C-core mains transformer

Lundahl LL1649 mains transformer for tube amplifiers

Must be ordered. Ready for shipment in 14 days
Shipping time: 15 - 16 workdays
C-core mains transformer

Lundahl LL1650 C-core mains transformer

In stock!
Shipping time: 1 - 2 workdays
LL1650 is a C-core mains transformers. The core is assembled with a small air-gap to compensate for any mains DC- unbalance. Estimated power rating 250 VA which can be increased with good cooling. Magnetic stray is extremely small if secondaries of the two coils are loaded identically.

Lundahl LL1651 C-core mains transformer 5

In stock!
Shipping time: 1 - 2 workdays
C-core mains transformer

Lundahl LL1665 C-core mains transformer

Must be ordered. Ready for shipment in 14 days
Shipping time: 15 - 16 workdays
mains transformers for tube amplifiers 230V : 530V + 530V + (4 x 6.6V)

Lundahl LL1683 mains transformer for tube amplifiers

Must be ordered. Ready for shipment in 14 days
Shipping time: 15 - 16 workdays
C-core mains transformer

Lundahl LL2738 Tube Filament Current Mains Transformers

Must be ordered. Ready for shipment in 14 days
Shipping time: 15 - 16 workdays
LL2738 is a C-core (with small air gap) mains transformer for applications where a large number of tube filaments needs supply.