Manufacturer of Ultra High Quality Audio Transformers
Product Overview:
Introduction
Input (and DC-free line output) applications
Plate (anode) chokes, interstage and line output
Push-Pull and SE
Chokes for Power Supply
Mains transformers
Amorphous cores
Storage
Mains transformers
In the Lundahl C-core mains transformers, a very small air-gap is used to compensate for any DC unbalance in the mains outlet. Secondary voltages listed are no-load voltages. Voltage drop because of load is to be calculated from transformer copper resistance and load current.
Electrical size is estimated to 250VA, which can be increased with good cooling. For optimized use, about 75% of power should be taken from secondary 1. Primaries should be connected in series for 210 - 250 V, in parallel for 105 - 125V. Table entries are calculated for primary voltage 230 V.
| Type | Secondary 1 | Secondary 2 and 3 | Secondary 4 and 5 | Secondary 6 |
|---|---|---|---|---|
| LL1648 | 350V | 5.9V | 6.6V | - |
| LL1649 | 230V | 6.6V | 6.6V | - |
| LL1650 | 350V | 6.6V | 6.6V | - |
| LL1651 | 500V | 6.6V | 6.6V | - |
| LL1683 | 250V / 0.16mA | 6.6V / 3A | 5.2V / 3A | 48V / 0.1A |
NOTE! Please study a very smart hybrid
power supply principle. This principle avoids the very high voltage
of an all tube rectifier and uses the transformer more efficiently.