Bob's Devices SKY 10 Step-Up Transformer

Beautiful Bob's devices SKY10 1:5/1:10 Step-Up Transformer. ($1375.00 list.) Comes with matching Bob's Devices shielded cable. ($375.00 list)
Custom Step-Up Transformer (SUT) for moving coil (MC) cartridges
Each SUT is hand-made, one at a time, using point to point wiring and individually tested. No circuit boards are used.  Hand Crafted in the USA.

The SKY 10 is switchable for 1:5 (14dB) or 1:10 (20dB).  

From Bob’s Website:

"New design with switches on front that also includes new laminations inside the transformers.   A significant factor in the performance of a high quality audio transformer is the quality of the core material. It takes energy to induce a magnetic field from the exciting signal on the primary winding(s) in the core. MC phono cartridges put out a tiny amount of energy at peak levels. The core material must perform optimally in this operating range. In the new SKY step-up transformers, we use proprietary 80% nickel mu-metal laminations which are processed for optimal performance at very low signal levels. The result is giant crystal structures within the material. When the laminations are stacked into the coils great care is given not to induce any strain. The SKY is designed to match the inductance to most Low output moving coil phono cartridges.  Due to the improved laminations, the bandwidth has been extended a little further in both directions than in previous versions.
Hand Crafted, Moving Coil (MC) Cartridge Step-up Transformer (SUT) built with new CineMag SKY (Blue Version) Transformers and gold plated hardware in a hand polished black powder coated cast-aluminum enclosure. All lettering is laser etched. Included are 2 switches: high/low gain and ground/lift.
Includes premium construction with C&K Brand Silver contact toggle switches, and Deluxe Gold Plated RCA jacks. 
These specially designed transformers are wired to connect a moving coil cartridge (on a turntable) to a phono preamplifier, phono input of a receiver, or your preamp's phono input.

This unit includes a grounding post that can be used to connect your turntable ground and your preamplifier ground.  It also includes a ground "lift" switch.  In all modes, the transformer cases and faraday shield internal to the transformers are connected to the ground screw.  In the "ground" mode, the phono system minus sides (negative sides) are connected to the grounding lug.  This configuration works well for those systems where the turntable ground is connected to the negative leads coming from the phono cartridge or where the negative inputs to the preamp are internally connected to ground.  In the "lift" mode, none of the conductors in the RCA jacks are connected to the case, ground, or shield and there is no electrical connection between channels.  This design allows you much flexibility to mitigate for ground loops regardless of the configuration of your other equipment."

https://www.bobsdevices.com
 

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