We will soon be taking orders on a new product made available from Audio Note Kits division........ a step-up transformer for low output moving coil cartridges from .25mV - 1.0V. The end user will have the ability to customize the loading for their particualr cartridge. We have had several inquiries to custom build these into custom enclosures. The custom transformers were designed by Andy Grove, design engineer for Audio Note. A brief note from Andy can be found below.
We will be building these into custom built hardwood enclosures to match some of our other products and/or your decor. They will be very reasonably priced. Around $750 - $800 in hardwood enclosures. Below are a few pictures of a solid Cherry unit going to ......
...... for use in conjunction with our Musica Bella 'Musicale' phono preamp as can also be seen in the picture below. I won't mention any names but if he wants to release any information......
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This piece still needs to be sanded and finished as well as have a base installed.
The smaller middle piece.
Some info on the step-up transformer...
Andy Grove (Audio Note design engineer) writes... The AudioNote Kits step-up transformer is configurable as 1:10 or 1:20 ratio, offering gains of 20dB or 26dB respectively. These two ratios are suitable for medium to high output moving coil cartridges, with output from around 0.25mV up to 1mV. The load a transformer reflects is proportional to the square of the turns ratio, so 1:10 gives an impedance transformation of 1:100, and the 1:20 gives a transformation ratio of 1:400. When loaded with the 47k of a standard phono stage the reflected impedances will be 470 ohms, and 117.5 ohms, usually the lower output cartridges require a lower impedance load, in the hundred-ohm range. If the 470 ohms or 117.5 ohms loads are way outside the specified load for your cartridge then extra loading resistors can be added at the secondary to correct the impedance if necessary, but generally medium output cartridges are fairly load tolerant...
