{"type":"product","schema_version":"1.0","item_id":"100242143450","canonical_url":"https://tw.bid.yahoo.com/item/100242143450","title":"湖南省長沙曙光電子管廠製6P9P功率放大用五極真空管一對，6AG7同等管，單端輸出3瓦，低柵偏壓訊源輸入，高功率靈敏度！","subtitle":"老庫存全新品！一標一對！","condition":"全新品","currency":"TWD","observed_at":"2026-05-20T12:47:42.367Z","current_price":180,"original_price":null,"stock_status":"low_stock","available_quantity":3,"sold_quantity":0,"seller":{"id":"Y5745547719","name":"Y5745547719","positive_rate":null,"rating_count":null},"images":[{"url":"https://img.yec.tw/ob/image/45d6f2f5-5182-4bfb-8193-8ad6e1358463.jpg","role":"main","alt":"商品主圖","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/a12ce02d-79e4-429a-9950-fb587b99e1cd.jpg","role":"detail","alt":"商品圖片 2","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/7ff3d946-b424-4bf0-95ba-a08ed6ff6a93.jpg","role":"detail","alt":"商品圖片 3","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/e5fb2afd-0ec4-45ce-9e48-01286730842a.jpg","role":"detail","alt":"商品圖片 4","width":null,"height":null}],"description":"老庫存全新品！一標一對！ \n\n此款湖南省長沙曙光電子管廠產製之軍用級6P9P功率放大用五極真空管，即歐美6AG7規格，在許多早期的視頻放大電路，以及無線電、收音機內，常可見到它的蹤影。它的高互導值，得以減少線性失真；高功率靈敏度，則可簡化前級驅動電路。\n\n依據原廠技術資料，燈絲電壓6.3V，絲流0.65A，屏壓300V，簾柵壓150V，偏壓-3V，屏流30mA，簾柵流7mA，負載10KΩ時，出力達3瓦，失真僅7％。許多功率管在相當工作條件下，失真已高達10％，由此可見6P9P（6AG7）設計之精良！ \n\n外部的金屬罩殼，連接在第一腳位上，將之接地，可隔絕外部雜散磁場干擾。比照民用全玻璃管身版本，如相片二，可看出管內電極採全包覆式的結構，可使電場運作穩定，有效減少散射電子。前述兩項利基，正是成就其背景噪訊極低的秘密武器！\n\n此外，外殼上有一圓孔，可檢視管子的燈絲是否處於點亮工作狀態，如相片三。這樣的設計，對於軍用野戰的使用層級，是一項非常便利的巧思！也是在歐美管身上所看不到的優點。\n\n以上各項優點，用在擴大機上，因為線性失真低，就可減少負回授量，音樂細節更豐富；而功率靈敏度高，則可CD信號直驅，簡化前級放大電路；而散射電子少，定位性更佳，音色也更清晰。\n\n依據個人視聽經驗，此型管調性柔和，高中低各頻段發展平衡。以一片小野麗莎的Bossa Nova來試音，中頻段的人聲相當柔和，吉他聲清脆明快，完全沒有緊迫逼人的情形，反倒是讓人聆聽愉快，輕鬆自然！ \n\n誠摯建議就用最簡單的做法，以兩支管、一對小OPT、一個電源進行組裝，省工省時又好聲！不論您是要放在書房、工作室，還是電腦桌上，怎麼用都方便！誠意分享，心動不如馬上行動，保證讚不絕口！","shipping_methods":[{"name":"郵局掛號","fee":0,"currency":"TWD"},{"name":"7-ELEVEN取貨付款","fee":0,"currency":"TWD"},{"name":"宅配/貨運","fee":0,"currency":"TWD"},{"name":"離島配送","fee":0,"currency":"TWD"}],"lowest_shipping_fee":null,"payment_methods":["ATM轉帳","7-ELEVEN取貨付款"],"category_id":"2092073820","category_name":"其他事務用品","breadcrumb":[{"id":"3994318","name":"圖書/影音/文具","url":"/tw/%E5%9C%96%E6%9B%B8-%E5%BD%B1%E9%9F%B3-%E6%96%87%E5%85%B7-3994318-category.html"},{"id":"2092073810","name":"文具與事務用品","url":"/tw/%E6%96%87%E5%85%B7%E8%88%87%E4%BA%8B%E5%8B%99%E7%94%A8%E5%93%81-2092073810-category.html"},{"id":"2092078500","name":"事務用品","url":"/tw/%E4%BA%8B%E5%8B%99%E7%94%A8%E5%93%81-2092078500-category.html"},{"id":"2092073820","name":"其他事務用品","url":"/tw/%E5%85%B6%E4%BB%96%E4%BA%8B%E5%8B%99%E7%94%A8%E5%93%81-2092073820-category.html"}],"view_count":1,"watch_count":0}