{"product_id":"iwistao-40w-5k-push-pull-tube-amplifier-output-transformer-for-for-300b-2a3-pp-amplifiers","title":"IWISTAO 40W 5K 1 Pair Push-Pull Tube Amplifier Output Transformer for For 300B 2A3 PP Amplifiers","description":"\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-outline-level: 2;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 18.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eIWISTAO 40W 5K Push-Pull Tube Amplifier Output Transformer \u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e86 × 50 Core | 5KΩ P-P | 4Ω \/ 8Ω Output | For 300B, 2A3 and Other Push-Pull Tube Amplifiers\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eModel No: WHFTR-PPOPT5K\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eThis high-quality \u003cb\u003e40W push-pull output transformer\u003c\/b\u003e is designed for DIY tube amplifier projects requiring a \u003cb\u003e5KΩ plate-to-plate primary impedance\u003c\/b\u003e. It is suitable for push-pull output stages using tubes such as \u003cb\u003e300B, 2A3\u003c\/b\u003e, and other compatible power tubes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"line-height: normal; text-align: center;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1105\/6138\/files\/WHFTR-PPOPTK5K.jpg?v=1789888355\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eThe transformer uses \u003cb\u003e86 × 50 grain-oriented silicon-steel laminations\u003c\/b\u003e and high-quality \u003cb\u003eoxygen-free copper enamelled wire\u003c\/b\u003e. A carefully designed \u003cb\u003esectional winding structure\u003c\/b\u003e improves magnetic coupling between the primary and secondary windings, helping achieve wide frequency response, low leakage inductance, and improved transient performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eWith a specified frequency response of \u003cb\u003e28Hz–39kHz (-1dB)\u003c\/b\u003e, this transformer is suitable for high-fidelity tube amplifier designs where extended bandwidth and accurate signal transfer are important.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eEach transformer undergoes controlled drying and \u003cb\u003evacuum varnish impregnation\u003c\/b\u003e, improving winding stability, insulation reliability, mechanical strength, and long-term durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-outline-level: 3;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 13.5pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eFeatures\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e40W push-pull output transformer\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e5KΩ plate-to-plate primary impedance\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eSecondary taps for \u003cb\u003e4Ω and 8Ω speakers\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eSuitable for \u003cb\u003e300B PP, 2A3 PP\u003c\/b\u003e and similar tube amplifier circuits\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e86 × 50 grain-oriented silicon-steel core\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eHigh-quality \u003cb\u003eoxygen-free copper enamelled winding wire\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eSectional \/ interleaved winding construction for improved primary-to-secondary coupling\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eWide bandwidth design: \u003cb\u003e28Hz to 39kHz (-1dB)\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003ePrimary inductance up to \u003cb\u003e35H\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eCNC-controlled drying process\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\n\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eVacuum varnish impregnated\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e for improved insulation and reduced mechanical vibration\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eHeavy-duty construction for Hi-Fi tube amplifier DIY projects\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-outline-level: 3;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 13.5pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eSpecifications\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ctable class=\"MsoNormalTable\" border=\"0\" cellpadding=\"0\" style=\"mso-cellspacing: 1.5pt; mso-yfti-tbllook: 1184;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"mso-yfti-irow: 0; mso-yfti-firstrow: yes;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" align=\"center\" style=\"margin-bottom: 0cm; text-align: center; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eParameter\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" align=\"center\" style=\"margin-bottom: 0cm; text-align: center; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eSpecification\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"mso-yfti-irow: 1;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eTransformer Type\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003ePush-Pull Output Transformer\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 2;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eRated Power\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e40W PP\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 3;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003ePrimary Impedance\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e5KΩ P-P\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 4;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eSecondary Impedance\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e0-4-8Ω\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 5;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003ePrimary Inductance\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e35H (P1-P2)\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 6;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eFrequency Response\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e28Hz–39kHz (-1dB)\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 7;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eCore Specification\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e86 × 50\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 8;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eCore Material\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eGrain-Oriented Silicon Steel\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 9;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eWinding Wire\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eOxygen-Free Copper Enamelled Wire\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 10;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eOverall Dimensions\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e88 × 100 × 75mm\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 11;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eWeight\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eApprox. \u003cb\u003e2.4kg each\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"mso-yfti-irow: 12; mso-yfti-lastrow: yes;\"\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003ePair Weight\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: .75pt .75pt .75pt .75pt;\"\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 0cm; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eApprox. \u003cb\u003e4.8kg \/ pair\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-outline-level: 3;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 13.5pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eRecommended Applications\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eThis output transformer can be used in a variety of \u003cb\u003epush-pull vacuum tube power amplifier\u003c\/b\u003e projects, particularly designs based on \u003cb\u003e300B or 2A3 power tubes\u003c\/b\u003e. Its 5KΩ primary impedance and 40W power capability also make it potentially suitable for other push-pull tube configurations when the required load impedance, operating voltage, plate current, and output power are compatible.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eThe \u003cb\u003e4Ω and 8Ω secondary taps\u003c\/b\u003e allow connection to commonly used Hi-Fi loudspeakers, making it a practical choice for custom tube amplifier construction, restoration, and advanced DIY audio projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan; mso-outline-level: 3;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 13.5pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eBuilt for High-Fidelity Tube Amplifiers\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eAn output transformer is one of the most critical components in a tube power amplifier. Core material, winding geometry, primary inductance, leakage inductance, copper resistance, and inter-winding coupling all affect bass extension, high-frequency response, distortion, and overall sonic performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eThis transformer combines a substantial \u003cb\u003e86 × 50 laminated core\u003c\/b\u003e, \u003cb\u003e35H primary inductance\u003c\/b\u003e, carefully sectioned windings, and vacuum impregnation to provide a solid foundation for a high-performance push-pull tube amplifier.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-pagination: widow-orphan;\"\u003e\u003cb\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003ePackage option:\u003c\/span\u003e\u003c\/b\u003e\u003cspan lang=\"EN-US\" style=\"font-size: 12.0pt; font-family: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003e 1 pair \u003c\/span\u003e\u003c\/p\u003e","brand":"IWISTAO HIFI MINIMART","offers":[{"title":"Default Title","offer_id":48380440641651,"sku":"WHFTR-PPOPT5K","price":129.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1105\/6138\/files\/WHFTR-PPOPTK5K_633f9147-53de-4ce8-8ac0-02d262f37dc1.jpg?v=1789888413","url":"https:\/\/iwistao.com\/products\/iwistao-40w-5k-push-pull-tube-amplifier-output-transformer-for-for-300b-2a3-pp-amplifiers","provider":"IWISTAO HIFI MINIMART","version":"1.0","type":"link"}