{"title":"Lundahl Alimentazione nucleo C","description":"\u003cp\u003eWe manufacture a limited range of C-core mains transformers, primarily for tube amplifiers. Our transformers are best used with bridge rectifier circuits (four diodes), but some transformers can also be used with full wave rectifier circuits. ‎\u003cbr\u003eThe \u003ca href=\"https:\/\/www.lundahltransformers.com\/wp-content\/uploads\/datasheets\/Hybrid_pwd.gif\" target=\"_blank\"\u003ehybrid power supply principle\u003c\/a\u003e provides a bridge rectifier circuit using classical tube rectifier tubes in combination with modern diodes.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe transformer primaries are connected in series for 210 – 250V and in parallel for 105 – 125V. Secondary voltages are calculated for 230V \/ 115V primary voltage.\u003c\/p\u003e\n\u003cp\u003eThe secondary voltage listed are no-load voltage. Voltage drop because of load can be calculated from transformer copper resistance and load current. For optimal use, about 75% of power should be taken from secondary 1.\u003c\/p\u003e\n\u003cp\u003eIn our mains transformers, a small deliberate C-core air-gap is used to prevent from core saturation caused by any DC unbalance in the mains outlet.\u003c\/p\u003e","products":[{"product_id":"ll1648-lundahl-power-supply-transformer","title":"LL1648 Lundahl - 350V\/0.63A - 2x 6.6V\/3.1A - 5.9V\/3.1A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL1648 C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 350V\/0.63A - 5.9V \/ 3.1A - 6.6V \/ 3.1A\u003c\/p\u003e\n\u003cp\u003eC-core mains transformers. The core is assembled with a small air-gap to compensate for any mains DCunbalance. Estimated power rating 250 VA which can be increased with good cooling. Magnetic stray is extremely small if secondaries of the two coils are loaded identically\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628141396353,"sku":null,"price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23744.jpg?v=1777975018"},{"product_id":"ll1649-lundahl-power-supply-transformer","title":"LL1649 Lundahl - 230V\/1A - 4x 6.6V\/3.1A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL1649 C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 230V \/ 1.0A - 6.6V \/ 3.1A \u003c\/p\u003e\n\u003cp\u003eC-core mains transformers. The core is assembled with a small air-gap to compensate for any mains DCunbalance. Estimated power rating 250 VA which can be increased with good cooling. Magnetic stray is extremely small if secondaries of the two coils are loaded identically\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628290687361,"sku":null,"price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23748.jpg?v=1777976263"},{"product_id":"ll1650-lundahl-power-supply-transformer","title":"LL1650 Lundahl - 350V\/0.63A - 4x 6.6V\/3.1A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL1650 C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 350V \/ 0.63A - 6.6V \/ 3.1A \u003c\/p\u003e\n\u003cp\u003eC-core mains transformers. The core is assembled with a small air-gap to compensate for any mains DCunbalance. Estimated power rating 250 VA which can be increased with good cooling. Magnetic stray is extremely small if secondaries of the two coils are loaded identically.\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628290949505,"sku":null,"price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23750.jpg?v=1777976272"},{"product_id":"ll1651-lundahl-power-supply-transformer","title":"LL1651 Lundahl - 500V\/0.43A - 4x 6.6V\/3.1A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL1651 C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 500V \/ 0.43A - 6.6V \/ 3.1A - 6.6V \/ 3.1A\u003c\/p\u003e\n\u003cp\u003eC-core mains transformers. The core is assembled with a small air-gap to compensate for any mains DCunbalance. Estimated power rating 250 VA which can be increased with good cooling. Magnetic stray is extremely small if secondaries of the two coils are loaded identically.\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628293767553,"sku":null,"price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23745.jpg?v=1777976280"},{"product_id":"ll1665-lundahl-power-supply-transformer","title":"LL1665 Lundahl - 530-0-530V\/0.35A o 530V\/0.5A - 6.6V\/3.1A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL1665 C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 530-0-530V \/ 0.35A - 6.6V \/ 3.1A \u003c\/p\u003e\n\u003cp\u003eC-core mains transformers. The core is assembled with a small air-gap to compensate for any mains DCunbalance. Estimated power rating 250 VA which can be increased with good cooling\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628293898625,"sku":null,"price":211.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23749.jpg?v=1777976291"},{"product_id":"ll1683-lundahl-power-supply-transformer","title":"LL1683 Lundahl - 2x 250V\/80mA - 48V\/0.1A 2x 6.6V\/3A - 2x 5.2V\/3A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL1683 C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 250-0-250V \/ 0.16A - 6.6V \/ 3A - 5.2V \/ 3A - 48V \/ 0.1A\u003c\/p\u003e\n\u003cp\u003eC-core mains transformer. The core is assembled with a small air-gap to compensate for any mains DC-unbalance. Estimated power rating 120 VA, which can be increased with good cooling. The 2 x 250V secondaries are internally divided between the two coils. As a result, the transformer can be used with bridge or full wave rectifiers without a problem of asymmetric load. Magnetic stray is extremely small if filament secondaries of the two coils are loaded identically.\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628293996929,"sku":null,"price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23746.jpg?v=1777976299"},{"product_id":"ll2738-lundahl-power-supply-transformer","title":"LL2738 Lundahl - 8x 6.6V\/3A - 110V\/0.1A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL2738 C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 110V \/ 0.1A - 6.6V \/ 3A x 8\u003c\/p\u003e\n\u003cp\u003eLL2738 is a C-core (with small air gap) mains transformer for applications where a large number of tube filaments needs supply. Estimated power rating 160 VA which can be increased with good cooling. Magnetic stray is small if the two coils are loaded symmetrically\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628294062465,"sku":null,"price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23747.jpg?v=1777976309"},{"product_id":"ll2741-lundahl-power-supply-transformer","title":"LL2741 Lundahl - 290V\/0.55A - 4x 6.3V\/3.1A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL2741 C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 290V \/ 0.55A - 6.3V \/ 3.1A \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eC-core mains transformer. The core is assembled with a small air-gap to compensate for any mains DC-unbalance. Estimated power rating 250 VA which can be increased with good cooling. Magnetic stray is extremely small if secondaries of the two coils are loaded identically.\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628294095233,"sku":null,"price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23752.jpg?v=1777976317"},{"product_id":"ll2758-lundahl-power-supply-transformer","title":"LL2758 Lundahl - 2x 250V\/130mA - 4x 6V\/2A - 15-0-15V\/0.1A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL2758 C-core. 100VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 250-0-250V \/ 0.13A x 2 - 6V \/ 2A - 6V \/ 2A - 30V \/ 0.1A\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eC-core mains transformer, assembled with a small core air-gap to compensate for any mains DC-unbalance. Estimated power rating 100 VA, which can be increased with good cooling. The 2 x 250V secondaries are internally divided between the two coils. As a result, the transformer can be used with bridge or full wave rectifiers without a problem of asymmetric load. Magnetic stray is extremely small if filament secondaries of the two coils and the 15V-0-15V winding are loaded symetrically\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628294259073,"sku":null,"price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23755.jpg?v=1777976325"},{"product_id":"ll2760-lundahl-power-supply-transformer","title":"LL2760 Lundahl - 2x 115V\/0.9A Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL2760 C-core. 200VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 115-0-115V \/ 0.9A x 2\u003c\/p\u003e\n\u003cp\u003eC-core mains transformer for 2 x 115V \/ 0.9A . The core is assembled with a small air-gap to compensate for any mains DCunbalance. Estimated power rating 200 VA (heat dissipation 11W) which can be increased with good cooling. Magnetic stray is extremely small due to the dual coil structure. A Faraday shield is provided between primary and secondary windings to improve immunity from mains HF noise.\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628294553985,"sku":null,"price":225.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/23756.jpg?v=1777976336"},{"product_id":"ll1669a-lundahl-power-supply-transformer","title":"LL1669A Lundahl - 340V\/0.55A - 4x 6.3V\/0.31A - 110V\/40mA Power supply transformer","description":"\u003cp\u003eTrasformatore Lundahl di alimentazione LL1669A C-core. 250VA. Peso e dimensioni nel datasheet\u003c\/p\u003e\n\u003cp\u003ePrimari: 230V\/115V\u003c\/p\u003e\n\u003cp\u003eSecondari: 340V \/ 0.35A - 6.3V \/ 3.1A\u003c\/p\u003e\n\u003cp\u003eC-core mains transformer. The core is assembled with a small air-gap to compensate for any mains DC-unbalance. Estimated power rating 250 VA which can be increased with good cooling. Magnetic stray is extremely small if secondaries of the two coils are loaded identically\u003c\/p\u003e","brand":"AudioKitHos","offers":[{"title":"Default Title","offer_id":55628377817473,"sku":null,"price":255.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/files\/24144.jpg?v=1777977264"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/9630\/7329\/collections\/31990.jpg?v=1773154843","url":"https:\/\/www.audiokit.it\/collections\/alimentazione-nucleo-c.oembed","provider":"AudioKit","version":"1.0","type":"link"}