Bob's Devices CineMag Sky 20-S MC Step Up Transformer (1:10/1:20 RCA)
Bob's Devices CineMag Sky 20-S MC Step Up Transformer (1:10/1:20 RCA)
Brand: Bob's Devices

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Bob's Devices CineMag Sky 20-S MC Step Up Transformer (1:10/1:20 RCA)

$1,650.00
 
Availability: In Stock
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SKU:
BOBSKY20SRS
UPC:
BOBSKY20SRS
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Available as switchable or non-switchable.

Bob's Devices MC Step Up Transformers are Hand-Made upon order and are ready to ship in approximately 1-2 weeks!

Special Note: The CineMag Sky 20-S SUT is available for special order at a fixed ratio (1:10 or 1:20), without a switch at the same price. Optional XLR connectors are available on a larger custom chassis without laser etching for an additional $350. Please contact us at sales@elusivedisc.com or 800-782-3472. Please allow 1-2 weeks for order fulfillment.

The hand crafted CineMag Sky 20-S MC Step-up Transformer (SUT) is 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 and included is a switchable premium construction, C&K Brand Silver contact toggle switches from high to low gain, deluxe gold plated RCA jacks and ground/lift.

SKY 20 - S Step-Up transformer. This is a step up (pun intended) from the SKY 20 Step-Up transformer. It is heavier and meatier than the SKY 20. It has the same ratios (1:10 in LOW and 1:20 in HIGH). If your system is very revealing, you will notice the difference. It was hard to upgrade the SKY 20. We tried many combinations and found that by increasing the length of the core, we could change the winding scheme just a bit. You will "Hear the Magic."

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. The SKY 20-S is switchable for 1:10 (20dB) or 1:20 (26dB)..

Construction Techniques

All connections are Resistance soldered using the American Beauty system which avoids heat damage to the delicate insulation on the hair-like wires of the transformers. Test equipment is very low current to avoid saturating the transformer cores. You can count on a premier product that is state-of-the-art.

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.

The Bob's Devices Sky 20-S was able to improve the performance of my reference analog rig to a new level, especially in terms of creating a silent platform that allows more music to reach my ears. Plus, it's made by someone who is uncommonly devoted to the art and science of the SUT, and he's constantly looking for ways to eke out just a little more realism from recorded music. He's done that here....When it comes to the SUT vs active MC phono stages, I'm leaning heavily toward SUTs - especially after my experience with the Sky 20-S. That's why it earns my highest recommendation.
-Marc Phillips, Part-Time Audiophile

Features

  • Switchable for 1:10 (20dB) or 1:20 (26dB)
  • In/Out RCA Connections
Voltage (mV) 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7
Internal Impedance (Ω)
5 40 40 40 30 30 20 20 20 15 15 15 10 15 10 10 10
10 40 40 30 20 20 20 20 15 15 15 15 10 10 10 10
15 40 40 30 30 20 20 20 20 15 15 15 15 10 10 10 10
20 40 30 30 20 20 20 20 15 15 15 15 15 10 10 10 10
25 30 30 20 20 20 15 15 15 15 10 10 10 10
30 30 30 20 20 20 15 15 15 15 15 10 10 10 10 10
35 30 30 20 20 15 20 15 15 15 15 15 10 10 10 10 10
40 30 30 20 20 15 20 15 15 15 15 10 15 10 10 10 10 10
45 30 20 20 15 15 15 15 15 10 15 10 10 10 10 10

This chart (based on using MM inputs with 47k Ohms impedance setting on phono stage) is not accurate for Denon Cartridges.

Note: Where 2 numbers appear, either can be used.

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