{"product_id":"5ar4-gz34-amperex-philips-sittard-f31-x9a-dd-getter-tube-holland-1950s-copia","title":"GZ34 \/ 5AR4 MULLARD NOS Brand GE Blackburn f32 Copper Plates – 7 Notches – Made in Great Britain '65","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eGZ34 \/ 5AR4 Mullard NOS – Brand GE – Blackburn f32 – Copper Plates – 7 Notches \u003cmeta charset=\"utf-8\"\u003e– \u0026nbsp;Made in Great Britain (1965)\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"0\" data-end=\"737\"\u003eThis \u003cstrong data-start=\"37\" data-end=\"64\"\u003eNOS Mullard GZ34\/5AR4\u003c\/strong\u003e , \u003cstrong data-start=\"66\" data-end=\"78\"\u003eBrand GE\u003c\/strong\u003e , produced in the historic \u003cstrong data-start=\"116\" data-end=\"142\"\u003eBlackburn factory (code f32)\u003c\/strong\u003e in \u003cstrong data-start=\"147\" data-end=\"155\"\u003e1965\u003c\/strong\u003e , represents one of the most sought-after and appreciated rectifiers ever. It is a \u003cstrong data-start=\"249\" data-end=\"273\"\u003etrue English Mullard\u003c\/strong\u003e , branded GE for the foreign market, but entirely built by Mullard to the highest standards of the British golden age. \u003cbr data-start=\"411\" data-end=\"414\"\u003e\u003cstrong data-start=\"433\" data-end=\"450\"\u003eCopper plate\u003c\/strong\u003e construction is a hallmark of Blackburn's finest Mullard GZ34s, contributing to a benchmark in electrical and sonic performance. The tube is \u003cstrong data-start=\"607\" data-end=\"614\"\u003eNOS\u003c\/strong\u003e , in excellent condition, and has been \u003cstrong data-start=\"653\" data-end=\"678\"\u003etested with a Funke W19\u003c\/strong\u003e , proving to be fully compliant with the original specifications.\u003c\/p\u003e\n\u003ch3 data-start=\"739\" data-end=\"767\"\u003e\u003cstrong data-start=\"741\" data-end=\"767\"\u003eSound Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"769\" data-end=\"952\"\u003e\u003cstrong data-start=\"769\" data-end=\"778\"\u003eBass:\u003c\/strong\u003e Deep, solid, and authoritative. The power supply is extremely stable even under load, with a well-structured low end that gives weight and control to the entire system.\u003c\/p\u003e\n\u003cp data-start=\"954\" data-end=\"1141\"\u003e\u003cstrong data-start=\"954\" data-end=\"962\"\u003eMids:\u003c\/strong\u003e Rich, fluid, and incredibly natural. Vocals and acoustic instruments emerge with a three-dimensionality and timbral coherence that made the Mullard school famous.\u003c\/p\u003e\n\u003cp data-start=\"1143\" data-end=\"1308\"\u003e\u003cstrong data-start=\"1143\" data-end=\"1151\"\u003eHighs:\u003c\/strong\u003e Silky, extended, and refined. The high end is airy and never aggressive, with a finesse that favors long, relaxed listening sessions without losing detail.\u003c\/p\u003e\n\u003cp data-start=\"1310\" data-end=\"1481\"\u003e\u003cstrong data-start=\"1310\" data-end=\"1322\"\u003eDynamics:\u003c\/strong\u003e Excellent. Transient response is prompt yet composed, with top-notch microdynamics and authoritative, controlled macrodynamics.\u003c\/p\u003e\n\u003cp data-start=\"1483\" data-end=\"1661\"\u003e\u003cstrong data-start=\"1483\" data-end=\"1497\"\u003eSoundstage:\u003c\/strong\u003e Wide, deep, and perfectly layered. The soundstage is stable, three-dimensional, and very realistic, with precise instrument placement.\u003c\/p\u003e\n\u003ch3 data-start=\"1663\" data-end=\"1712\"\u003e\u003cstrong\u003e🎧 Use in Hi-Fi Amplifiers\u003c\/strong\u003e\u003cbr data-start=\"1696\" data-end=\"1699\"\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1663\" data-end=\"1712\"\u003eIdeal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1715\" data-end=\"1793\"\u003eGZ34\/5AR4 compatible mid-high and high-end hi-fi amplifiers,\u003c\/li\u003e\n\u003cli data-start=\"1796\" data-end=\"1843\"\u003equality push-pull and single-ended circuits,\u003c\/li\u003e\n\u003cli data-start=\"1846\" data-end=\"1951\"\u003esystems that seek maximum power control, natural timbre and sonic refinement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1953\" data-end=\"2036\"\u003eA reference choice for jazz, classical, vocal and high-resolution systems.\u003c\/p\u003e\n\u003ch3 data-start=\"2038\" data-end=\"2104\"\u003e\u003cstrong\u003e🎸 Use in Music Applications\u003c\/strong\u003e\u003cbr data-start=\"2073\" data-end=\"2076\"\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2038\" data-end=\"2104\"\u003eAlso highly appreciated in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2107\" data-end=\"2177\"\u003evintage instrument amplifiers and professional equipment,\u003c\/li\u003e\n\u003cli data-start=\"2180\" data-end=\"2276\"\u003econtexts where absolute reliability, stability and balanced musical response are required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2278\" data-end=\"2404\"\u003e\u003cstrong\u003e🎯 Note for audiophiles and technicians\u003c\/strong\u003e \u003cbr data-start=\"2313\" data-end=\"2316\"\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"2407\" data-end=\"2460\"\u003eone of the \u003cstrong data-start=\"2417\" data-end=\"2457\"\u003ebest straighteners ever produced\u003c\/strong\u003e ,\u003c\/li\u003e\n\u003cli data-start=\"2463\" data-end=\"2516\"\u003eauthentic Mullard production Made in Great Britain,\u003c\/li\u003e\n\u003cli data-start=\"2519\" data-end=\"2568\"\u003e\u003cstrong data-start=\"2531\" data-end=\"2543\"\u003eGE Brand\u003c\/strong\u003e branding for the export market,\u003c\/li\u003e\n\u003cli data-start=\"2571\" data-end=\"2609\"\u003e\u003cstrong data-start=\"2571\" data-end=\"2606\"\u003eprofessional test on Funke W19\u003c\/strong\u003e ,\u003c\/li\u003e\n\u003cli data-start=\"2612\" data-end=\"2677\"\u003esound, historical and collectible value of the highest level.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2679\" data-end=\"2834\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eA valve intended for reference systems and demanding collectors, for those who want \u003cstrong data-start=\"2771\" data-end=\"2814\"\u003ethe authentic Mullard Blackburn sound\u003c\/strong\u003e , without compromise.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTest Results:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTubes tested on \u003cstrong\u003e\u003cspan\u003eFUNKE W19\u003c\/span\u003e\u003c\/strong\u003e Tube tester:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eTest Conditions:\u003c\/strong\u003e Va = 60V, Vf = 5V\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eGood from:\u003c\/strong\u003e Ia = 55 mA\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAverage 100%:\u003c\/strong\u003e Ia = 100 mA\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTest Result:\u003c\/strong\u003e VERY STRONG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003ePlate current:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eSection 1:\u003c\/strong\u003e\u003c\/span\u003e \u003cspan\u003eIa = 102 mA\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eSection 2:\u003c\/strong\u003e\u003c\/span\u003e \u003cspan\u003eIa = 101 mA\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAdditional Tests\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eMicrophonics:\u003c\/strong\u003e Standard. Tested and approved for use in hi-fi and guitar amplifiers.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOutput Quality:\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eExcellent – Very strong and stable output, no fluctuations.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eShort circuits and GAS:\u003c\/strong\u003e Absent.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eConditions:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFunctionality:\u003c\/strong\u003e Fully functional.\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCosmetic condition:\u003c\/strong\u003e \u003cspan\u003eExcellent – Excellently preserved lettering, minimal signs of wear. See photos for details.\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturing Code:\u003c\/strong\u003e f32 B5D1 → f3x indicates a GZ34 with the sequential progression of x, where the increment of x indicates the manufacturing changes -\u003cmeta charset=\"utf-8\"\u003e B5D1 B → Mullard, Blackburn - 5 (out of four digits) → 1965 - D → April - 1 → 1st week of the month\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003ca href=\"https:\/\/vacuumtubestreasures.com\/blogs\/notizie\/perche-le-nostre-valvole-sono-diverse\" title=\"Why our tubes are different – the VTT protocol that improves sound, reliability and durability\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eFind out why our valves are different →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"MULLARD","offers":[{"title":"Default Title","offer_id":56588261785948,"sku":"03392","price":2051.0,"currency_code":"DKK","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/3775\/5127\/files\/1_12aabcf7-4517-4633-8e66-8174d174582d.jpg?v=1769624576","url":"https:\/\/vacuumtubestreasures.com\/en-dk\/products\/5ar4-gz34-amperex-philips-sittard-f31-x9a-dd-getter-tube-holland-1950s-copia","provider":"Vacuum Tubes Treasures","version":"1.0","type":"link"}