{"product_id":"bobs-devices-sky-20s-step-up-transformer","title":"Bob's Devices SKY 20-S Step-Up Transformer","description":"\u003ch1\u003eBob's Devices SKY 20-S Step-Up Transformer\u003c\/h1\u003e\n\u003ch3\u003eA hand-crafted, MC SUT with gold-plated hardware.\u003c\/h3\u003e\n\u003cp\u003eDesigned to match the inductance of a wide range of cartridges, a Bob's Devices SKY SUT sits between a low-output moving coil cart and your phonostage. The SKY uses proprietary 80% nickel mu-metal laminations in the transformer windings which are processed for optimal performance at very low signal levels. The result is giant crystal structures within the material, and when the laminations are stacked into the coils great care is taken not to induce any strain. Due to this, bandwidth has been extended in both directions than in previous versions.\u003cbr\u003e\u003cbr\u003eThe updated SKY 20-S sees an \u003cspan\u003eincrease in the length of the core, allowing a change to the winding scheme. Bob's say the 20-S is \"heavier and meatier.\"\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eT\u003c\/span\u003eransformers are matched by gold-plated hardware in a hand-polished black powder-coated cast-aluminum enclosure. All lettering is laser etched. The two C\u0026amp;K Silver front panel switches control gain (high, low) and ground (on\/lift).\u003c\/p\u003e\n\u003ch4\u003eSUT with MM Phono Vs. MC Phono\u003c\/h4\u003e\n\u003cp\u003eMost moving-coil phono preamps add an extra gain stage to boost the tiny MC signal up to moving-magnet level, but that almost always raises noise and compromises sound. That's a lot of gain needed on a very delicate signal. \u003c\/p\u003e\n\u003cp\u003eA Bob’s Devices step-up transformer (SUT) avoids those trade-offs: it’s passive, silent, and purpose-built to match your specific MC cartridge to any MM phono input.\u003c\/p\u003e\n\u003cp\u003eInstead of dealing with switches, jumpers, and noise level inside an all-in-one preamp, you get the cleanest signal path, better cartridge matching, and a lower noise floor. \u003c\/p\u003e\n\u003cp\u003eIf you want your MC cartridge to deliver everything it’s capable of—clarity, dynamics, and a quieter background—you’ll get it with a dedicated Bob’s Devices SUT.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eSKY S Models\u003c\/h4\u003e\n\u003cp\u003eThe models offer the following switchable gain options.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSKY 10-S: \u003c\/strong\u003e1:5, 1:10\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSKY 20-S:\u003c\/strong\u003e 1:10, 1:20\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSKY 30-S: \u003c\/strong\u003e1:15, 1:30\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eConstruction Techniques\u003c\/h4\u003e\n\u003cp\u003eAll 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. A grounding post lets you connect your turntable ground and your preamplifier ground. It also includes a ground \"lift\" switch.\u003c\/p\u003e\n\u003cp\u003eIn all modes, the transformer cases and internal Faraday shields are connected to the ground screw. In the Ground mode, the phono negatives 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.\u003c\/p\u003e\n\u003cp\u003eIn 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 ground loops regardless of the configuration of your other equipment.\u003cbr\u003e\u003c\/p\u003e","brand":"Bob's Devices","offers":[{"title":"RCA to RCA","offer_id":48526904295608,"sku":"BD SKY-20S RCA\/RCA","price":1650.0,"currency_code":"USD","in_stock":true},{"title":"XLR to XLR","offer_id":48526904328376,"sku":"BD SKY-20S XLR\/XLR","price":1970.0,"currency_code":"USD","in_stock":true},{"title":"RCA in \/ XLR out","offer_id":48526904361144,"sku":"BD SKY-20S RCA\/XLR","price":1970.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/935314_97ade2aef33343c9884061dba1132202_mv2_jpg.webp?v=1741629637","url":"https:\/\/upscaleaudio.pro\/products\/bobs-devices-sky-20s-step-up-transformer","provider":"Upscale Audio","version":"1.0","type":"link"}