{"product_id":"mfj-557-deluxe-code-practice-oscillator","title":"MFJ-557 Deluxe Code Practice Oscillator","description":"\u003cp data-start=\"68\" data-end=\"151\"\u003e\u003cstrong data-start=\"68\" data-end=\"151\"\u003eMFJ-557 Deluxe Code Practice Oscillator – Morse Code Trainer with Speaker \u0026amp; Key\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"153\" data-end=\"481\"\u003eThe \u003cstrong data-start=\"157\" data-end=\"200\"\u003eMFJ-557 Deluxe Code Practice Oscillator\u003c\/strong\u003e is a complete, all-in-one solution for learning and practicing Morse code. Designed for beginners and experienced operators alike, this unit includes a \u003cstrong data-start=\"353\" data-end=\"392\"\u003ebuilt-in speaker and Morse code key\u003c\/strong\u003e, allowing you to start practicing right out of the box—no additional equipment required.\u003c\/p\u003e\n\u003cp data-start=\"483\" data-end=\"720\"\u003eWith adjustable tone and volume controls, the MFJ-557 lets you customize your listening experience for comfortable, extended practice sessions. Its compact, durable design makes it perfect for home use, classrooms, or portable operation.\u003c\/p\u003e\n\u003cp data-start=\"722\" data-end=\"739\"\u003e\u003cstrong data-start=\"722\" data-end=\"739\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"740\" data-end=\"1064\"\u003e\n\u003cli data-section-id=\"9uf78s\" data-start=\"740\" data-end=\"810\"\u003e\n\u003cp data-start=\"742\" data-end=\"810\"\u003e\u003cstrong data-start=\"742\" data-end=\"781\"\u003eBuilt-in Morse code key and speaker\u003c\/strong\u003e – ready to use immediately\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"x3um0a\" data-start=\"811\" data-end=\"877\"\u003e\n\u003cp data-start=\"813\" data-end=\"877\"\u003e\u003cstrong data-start=\"813\" data-end=\"852\"\u003eAdjustable tone and volume controls\u003c\/strong\u003e for personalized sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"18iguio\" data-start=\"878\" data-end=\"945\"\u003e\n\u003cp data-start=\"880\" data-end=\"945\"\u003e\u003cstrong data-start=\"880\" data-end=\"901\"\u003eStandard key jack\u003c\/strong\u003e for connecting an external key if desired\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gz2jqr\" data-start=\"946\" data-end=\"1000\"\u003e\n\u003cp data-start=\"948\" data-end=\"1000\"\u003e\u003cstrong data-start=\"948\" data-end=\"979\"\u003eCompact and portable design\u003c\/strong\u003e for easy transport\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"6popcz\" data-start=\"1001\" data-end=\"1064\"\u003e\n\u003cp data-start=\"1003\" data-end=\"1064\"\u003eDurable construction from trusted brand \u003cstrong data-start=\"1043\" data-end=\"1062\"\u003eMFJ Enterprises\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1066\" data-end=\"1091\"\u003e\u003cstrong data-start=\"1066\" data-end=\"1091\"\u003eTypical Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1092\" data-end=\"1277\"\u003e\n\u003cli data-section-id=\"elogya\" data-start=\"1092\" data-end=\"1144\"\u003e\n\u003cp data-start=\"1094\" data-end=\"1144\"\u003eLearning Morse code (CW) for ham radio licensing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ahbtvm\" data-start=\"1145\" data-end=\"1186\"\u003e\n\u003cp data-start=\"1147\" data-end=\"1186\"\u003ePracticing sending and receiving code\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"u3u9dv\" data-start=\"1187\" data-end=\"1230\"\u003e\n\u003cp data-start=\"1189\" data-end=\"1230\"\u003eClassroom training or group instruction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1al8gpk\" data-start=\"1231\" data-end=\"1277\"\u003e\n\u003cp data-start=\"1233\" data-end=\"1277\"\u003eSkill sharpening for experienced operators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1279\" data-end=\"1454\"\u003eWhether you’re just getting started with CW or refining your skills, the \u003cstrong data-start=\"1352\" data-end=\"1395\"\u003eMFJ-557 Deluxe Code Practice Oscillator\u003c\/strong\u003e offers a simple, reliable way to build speed and accuracy.\u003c\/p\u003e","brand":"MFJ","offers":[{"title":"Default Title","offer_id":52857348456745,"sku":"6623535869","price":115.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0887\/2670\/0329\/files\/MFJ-557_Deluxe_Code_Practice_Oscillator.jpg?v=1774035680","url":"https:\/\/tekshack.com\/products\/mfj-557-deluxe-code-practice-oscillator","provider":"TekShack","version":"1.0","type":"link"}