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Mains transformers
We manufacture a limited range of C-core mains transformers, primarily for tube amplifiers. Our 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 class...
Mains transformers
We manufacture a limited range of C-core mains transformers, primarily for tube amplifiers. Our 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 our mains transformers, a small deliberate C-core air-gap is used to prevent from core saturation caused by any DC unbalance in the mains outlet.
Lundahl Mains transformer, LL1648
Lundahl Mains transformer, LL1649
Lundahl Mains transformer, LL1650
Lundahl Mains transformer, LL1651
Lundahl Mains transformer, LL1655
Lundahl Mains Isolation Transformer with Stepup Windings, LL1662
Lundahl Mains Transformer for Tube Amplifiers, LL1665
Lundahl Mains Transformer for Tube Amplifiers, LL1669A
Lundahl Mains transformer, LL1683
Lundahl Mains transformer, LL2738
Lundahl Mains transformer, LL2741
Lundahl Mains transformer, LL2758
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