{"product_id":"gu74b-nos-4cx800a-russian-new-tube-gu74b","title":"Valvola GU74B \/ 4CX800A Tetrodo Ceramico per Amplificatori Acom e Alpha | HRS","description":"\u003cmeta charset=\"UTF-8\"\u003e\u003cdiv style=\"font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; width: 100%; max-width: 1000px; margin: 0 auto; border: 1px solid #e2e8f0; background-color: #ffffff; line-height: 1.6; position: relative; overflow: hidden; box-shadow: 0 4px 25px rgba(0,0,0,0.08);\"\u003e\n\u003c!-- FILIGRANA RIPOSIZIONATA PIÙ IN ALTO (top: 35%) E IN PRIMO PIANO ASSOLUTO (z-index: 99) --\u003e\u003cdiv style=\"position: absolute; top: 35%; left: 50%; width: 480px; height: 480px; background-image: url('https:\/\/cdn.shopify.com\/s\/files\/1\/0946\/2113\/9290\/files\/hrs_logo_new_senza_scritta.png?v=1776699756'); background-repeat: no-repeat; background-size: contain; background-position: center; opacity: 0.04; pointer-events: none; z-index: 99; transform: translate(-30%, -50%) rotate(-15deg);\"\u003e\u003c\/div\u003e\n\u003c!-- Header - Stile Componentistica RF Avanzata (Fondo Antracite Slate \u0026 Dettaglio Cyan) --\u003e\u003cdiv style=\"position: relative; padding: 55px 5%; border-bottom: 8px solid #06b6d4; background-color: #1e293b; z-index: 2;\"\u003e\n\u003c!-- Etichetta Categoria --\u003e\u003cdiv style=\"position: absolute; top: 25px; right: 5%; z-index: 10;\"\u003e\u003cdiv style=\"background: #06b6d4; color: #ffffff; font-size: 11px; font-weight: 900; text-transform: uppercase; letter-spacing: 2px; padding: 8px 18px; border-radius: 3px;\"\u003eVALVOLE TERMOIONICHE\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv style=\"position: relative; z-index: 2;\"\u003e\n\u003ch1 style=\"margin: 0 !important; font-size: 42px !important; text-transform: uppercase !important; letter-spacing: -1px !important; font-weight: 900 !important; line-height: 1.1 !important; color: #ffffff;\"\u003eGU74B \/ 4CX800A\u003c\/h1\u003e\n\u003cp style=\"margin: 15px 0 0 !important; font-size: 20px !important; color: #94a3b8; font-weight: 300 !important; text-transform: uppercase !important; letter-spacing: 3px !important;\"\u003eTetrodo di Potenza in Ceramica \/ Metallo Russian NEW Tube\u003c\/p\u003e\n\u003cp style=\"margin: 12px 0 0 !important; font-size: 13px !important; color: #ffffff !important; font-weight: 600 !important; letter-spacing: 2px !important; text-transform: uppercase !important;\"\u003eComponente NOS (New Old Stock) ad Alte Prestazioni – Dissipazione Anodica 800W\u003c\/p\u003e\n\u003cdiv style=\"width: 60px; height: 4px; background: #06b6d4; margin-top: 20px; border-radius: 2px;\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Contenuto --\u003e\u003cdiv style=\"padding: 40px 5%; position: relative; z-index: 2;\"\u003e\n\u003c!-- Box Caratteristiche Salienti - FONDO TRASPARENTE\/QUASI BIANCO --\u003e\u003cdiv style=\"margin-bottom: 35px; border-left: 4px solid #06b6d4; padding: 20px; background-color: #ecfeff; border-radius: 0 8px 8px 0; position: relative; z-index: 2;\"\u003e\n\u003ch2 style=\"color: #0891b2; font-size: 15px; text-transform: uppercase; letter-spacing: 2px; margin: 0 0 10px 0; font-weight: 900;\"\u003eMASSIMA AFFIDABILITÀ RF E LUNGA DURATA\u003c\/h2\u003e\n\u003cp style=\"color: #1e293b; font-size: 15px; margin: 0; line-height: 1.6; font-weight: 500;\"\u003e• \u003cstrong\u003eSOSTITUZIONE DIRETTA:\u003c\/strong\u003e Compatibile al 100% come ricambio plug-and-play per tutti i tubi siglati GU74B e 4CX800A utilizzati nei lineari commerciali di fascia alta e in progetti autocostruiti (Home Made).\u003cbr\u003e\u003cbr\u003e        • \u003cstrong\u003eDISSIPAZIONE DA 800 WATT:\u003c\/strong\u003e Grazie alla robusta struttura in ceramica e metallo, garantisce un indice di dissipazione della piastra nominale di ben 800W, con una linearità eccezionale nei modi SSB e CW.\u003cbr\u003e\u003cbr\u003e        • \u003cstrong\u003eCOMPATIBILITÀ TOP BRAND:\u003c\/strong\u003e Il ricambio ideale e raccomandato per i celebri amplificatori delle serie \u003cstrong\u003eACOM\u003c\/strong\u003e (1000, 1006, 1010, 2000A) e \u003cstrong\u003eALPHA\u003c\/strong\u003e (99, 91B, 8100).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Descrizione Prodotto --\u003e\u003cdiv style=\"margin-bottom: 40px; background: transparent; position: relative; z-index: 2;\"\u003e\n\u003ch2 style=\"color: #1e293b; font-size: 26px; margin-bottom: 15px; border-bottom: 2px solid #e2e8f0; padding-bottom: 10px; text-transform: uppercase; letter-spacing: 1px;\"\u003ePrestazioni e Linearità al Vertice\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; color: #475569; line-height: 1.7; text-align: justify; margin-bottom: 20px;\"\u003eI tetrodi di potenza ceramici \u003cstrong\u003eGU74B \/ 4CX800A\u003c\/strong\u003e di produzione russa rappresentano l'eccellenza tecnologica nella preamplificazione e amplificazione di potenza RF. Con un input di 1200 Watt quando impiegato come amplificatore di potenza lineare, il tubo produce in modo assolutamente conservativo \u003cstrong\u003e750W PEP in SSB\u003c\/strong\u003e e \u003cstrong\u003e750 Watt Key-Down in CW\u003c\/strong\u003e. Se utilizzato in amplificatori moderni dotati di circuiti di sintonizzazione automatica, vuoto e sistemi avanzati di protezione del tubo, la GU74B è in grado di esprimere una potenza significativamente superiore garantendo al contempo una lunghissima vita operativa. Le sue caratteristiche ne consentono l'uso ottimale sia come amplificatore RF con amplificazione di rete sia nel servizio con griglia a massa.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Box Tecnici Affiancati - FONDO BIANCO PURO --\u003e\u003cdiv style=\"width: 100%; margin-bottom: 40px; position: relative; z-index: 2;\"\u003e\n\u003cdiv style=\"width: 47%; float: left; background-color: #ffffff; border: 1px solid #e2e8f0; padding: 20px; border-radius: 8px; border-top: 5px solid #1e293b; box-sizing: border-box;\"\u003e\n\u003ch3 style=\"color: #1e293b; font-size: 11px; text-transform: uppercase; margin: 0 0 8px 0; font-weight: bold; letter-spacing: 1px;\"\u003eDISSIPAZIONE PIASTRA\u003c\/h3\u003e\n\u003cp style=\"font-size: 22px; font-weight: 800; color: #06b6d4; margin: 0;\"\u003e800 Watt\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"width: 47%; float: right; background-color: #ffffff; border: 1px solid #e2e8f0; padding: 20px; border-radius: 8px; border-top: 5px solid #06b6d4; box-sizing: border-box;\"\u003e\n\u003ch3 style=\"color: #06b6d4; font-size: 11px; text-transform: uppercase; margin: 0 0 8px 0; font-weight: bold; letter-spacing: 1px;\"\u003eTECNOLOGIA\u003c\/h3\u003e\n\u003cp style=\"font-size: 22px; font-weight: 800; color: #1e293b; margin: 0;\"\u003eCeramica \/ Metallo (NOS)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"clear: both;\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Tabella Specifiche Tecnica - STRUTTURA MINIMALISTA E TRASPARENTE --\u003e\u003cdiv style=\"background-color: transparent; position: relative; z-index: 2;\"\u003e\n\u003ch3 style=\"color: #1e293b; font-size: 18px; margin: 0 0 15px 0; text-transform: uppercase; font-weight: 800; letter-spacing: 1px;\"\u003eSpecifiche e Codici di Riferimento\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; background-color: #ffffff; border: 1px solid #e2e8f0;\"\u003e\n\u003cthead\u003e\u003ctr style=\"border-bottom: 2px solid #1e293b; text-align: left; background-color: #f8fafc;\"\u003e\n\u003cth style=\"padding: 12px 10px; color: #1e293b; font-weight: bold;\"\u003eParametro \/ Identificativo\u003c\/th\u003e\n\u003cth style=\"padding: 12px 10px; color: #1e293b; font-weight: bold;\"\u003eSpecifiche di Vendita\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 10px; color: #1e293b; font-weight: bold; border-bottom: 1px solid #e2e8f0;\"\u003eID Produttore \/ Parte DXE\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; color: #475569; border-bottom: 1px solid #e2e8f0;\"\u003eDXE-GU74B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fbfbfc;\"\u003e\n\u003ctd style=\"padding: 12px 10px; color: #1e293b; font-weight: bold; border-bottom: 1px solid #e2e8f0;\"\u003eTipo di Ricambio\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; color: #475569; border-bottom: 1px solid #e2e8f0;\"\u003eValvola termoionica \/ Tubo amplificatore di potenza\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 10px; color: #1e293b; font-weight: bold; border-bottom: 1px solid #e2e8f0;\"\u003eLinea di Prodotto\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; color: #475569; border-bottom: 1px solid #e2e8f0;\"\u003eTetrodi di potenza in ceramica GU74B \/ 4CX800A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fbfbfc;\"\u003e\n\u003ctd style=\"padding: 12px 10px; color: #1e293b; font-weight: bold; border-bottom: 1px solid #e2e8f0;\"\u003eOutput Conservativo (SSB\/CW)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; color: #475569; border-bottom: 1px solid #e2e8f0;\"\u003e750W PEP SSB \/ 750W Key-Down CW (con 1200W Input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 10px; color: #1e293b; font-weight: bold; border-bottom: 1px solid #e2e8f0;\"\u003eCompatibilità Amplificatori Alpha\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; color: #475569; border-bottom: 1px solid #e2e8f0;\"\u003eAlpha 99, Alpha 91B, Alpha 8100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fbfbfc;\"\u003e\n\u003ctd style=\"padding: 12px 10px; color: #1e293b; font-weight: bold; border-bottom: 1px solid #e2e8f0;\"\u003eCompatibilità Amplificatori Acom\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; color: #475569; border-bottom: 1px solid #e2e8f0;\"\u003eACOM 1000, ACOM 1006, ACOM 1010, ACOM 2000A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 10px; color: #1e293b; font-weight: bold; border-bottom: 1px solid #e2e8f0;\"\u003eQuantità confezione\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 10px; color: #475569; border-bottom: 1px solid #e2e8f0;\"\u003eVenduta singolarmente\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Footer --\u003e\u003cdiv style=\"background-color: #1e293b; padding: 25px 5%; text-align: center; border-top: 5px solid #06b6d4; position: relative; z-index: 2;\"\u003e\u003cp style=\"margin: 0; color: #ffffff; font-size: 12px; letter-spacing: 2px; font-weight: bold; text-transform: uppercase;\"\u003eHamRadioShop | Specialisti in Componentistica RF, Valvole di Ricambio e Assistenza\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HAMRADIOSHOP","offers":[{"title":"Default Title","offer_id":52419921215816,"sku":"GU74B-4CX800","price":459.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/0338\/7976\/files\/12380.jpg?v=1770150658","url":"https:\/\/offerprice.it\/products\/gu74b-nos-4cx800a-russian-new-tube-gu74b","provider":"OfferPrice","version":"1.0","type":"link"}