Lundahl Mains transformer, LL2758

Mains Transformers for Tube Preamplifiers LL2758

C-core mains transformer, assembled with a small core air-gap to compensate for any mains DC-unbalance. Estimated power rating 100 VA, which can be increased with good cooling. The 2 x 250V secondaries are internally divided between the two coils. As a result, the transformer can be used with bridge or full wave rectifiers without a problem of asymmetric load. Magnetic stray is extremely small if filament secondaries of the two coils and the 15V-0-15V winding are loaded symmetrically.

Weight 1.4 kg

Primary res. Serial/parallel: 17W / 4W
Sec 1 (Pins 15 22): 250V / 130mA 115W
Sec 2 (Pins 24 17): 250V / 130mA 115W
Sec 3 (Pins 26 19): 30V / 0.1A 8W
Sec 4 (Pins B7 B4): 6 V / 2A 0.2W
Sec 5 (Pins B6 B1): 6 V / 2A 0.2W
Sec 6 (Pins B3 B8): 6 V / 2A 0.2W
Sec 7 (Pins B2 B5): 6 V/ 2A 0.2W

Please note! Output current from rectifier: 63% of above with cap. input rectifier, 95% of above with choke input rectifier.