Aurorasound AFE-12 step up transformer for mc cartridges
Features
1. Lundahl MC transformer
Transparent sound without coloration
Unaltered cartridge characteristics
2. Selectable cartridge loading for different cartridges, 3 positions
Low 0.7Ω –10Ω / Mid 11Ω –30Ω / High 31Ω –100Ω
You can easily change cartridge loading with three position SW. Instead of the common winding tap method, AFE-12 uses 100% winding on both of the primary and secondary sides in all positions. The signal energy is transmitted very well.
3. Small robust body, gold-plated terminals
Specifications
Input : RCA, connect the wire from the player that equipes MC
Output : RCA, goes to MM input of phono stage amplifier
Cartridge impedance select : 3positions High / Low / Mid
Gain : 26dB, at low position
Frequency response : 20Hz ~ 50kHz, -3dB
Size : W70 x D30 x H95mm, 244g
Accessory : Small lubber foot
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Lundahl Transformers of Sweden is a manufacturer specialized in production of transformers for professional audio & tube amplifiers.
Their products are characterized by:
Do not use conventional bobbins
Unique uncut amorphous cobalt core
Dual coil construction for increased immunity to magnetic hum
Put it in a case and do not harden with resin
All manufacturing machines are developed in-house
Lundahl special winding technique, which does not use conventional bobbins, avoids the problem of barrel-shaped or anti-barrel-shaped windings when many layers coper wire in bobbins. With stick winding insulating sheets are wrapped directly between each layer of copper wire, so that the windings always lay out cleanly even if there are many layers. This allows more copper wires to be wound in a smaller volume and results in a superior frequency characteristics. The dual-coil structure has the advantage that two coils of the same configuration cancel external magnetic noise, and the magnetic flux produced by the coil itself does not affect the outside. The AFE-12 uses an MC SUT in which an amorphous strip is wound through the coils in many layers on a special machine made by Lundahl, to form an uncut core. As a result, the transformer has efficient sound energy conversion in micro level signals and excellent frequency characteristics.
