{"product_id":"1950-keyer-military-aka-morse-code-practice-oscillator-cpo","title":"1950 keyer, military aka Morse code practice oscillator CPO","description":"\u003cdiv arial class=\"n6owBd awi2gc\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAEQAA\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" google=\"\" jsaction=\"\" jscontroller=\"TDBkbc\" jsuid=\"XeTChc_e\" none rgb roboto sans sans-serif style=\"font-family: \" border-bottom:=\"\" font-size:=\"\" font-weight:=\"\" margin:=\"\" text-decoration:=\"\"\u003e\n \u003cspan arial border-bottom:=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-subtree=\"aimfl,mfl\" font-size:=\"\" font-weight:=\"\" google=\"\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n  A 1950s-style Morse code practice oscillator, often referred to as a \"keyer\" or code practice oscillator (CPO), is\n \u003c\/span\u003e\n \u003cmark arial border-bottom:=\"\" class=\"HxTRcb\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" data-wiz-uids=\"XeTChc_g\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"click:\u0026amp;XeTChc_f|h5M12e;mouseenter:\u0026amp;XeTChc_f|sbHm2b;mouseleave:\u0026amp;XeTChc_f|Tx5Rb;rcuQ6b:\u0026amp;XeTChc_f|npT2md\" jscontroller=\"DfH0l\" jsuid=\"XeTChc_f\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(0, 29, 53);\" text-decoration:=\"\"\u003e\n  \u003c!--qkimaf XeTChc_f\/HugV6--\u003e\n  \u003c!--cqw1tb XeTChc_f\/HugV6--\u003e\n  a vintage training device designed to teach ham radio operators how to send and receive Morse code by producing an audible tone when a telegraph key is pressed\n  \u003c!--TgQPHd|[]--\u003e\n \u003c\/mark\u003e\n . These units often feature a straight key mounted on a heavy metal base, an internal speaker or headphone jack, and adjustable volume\/tone controls.\n \u003c!--TgQPHd|[]--\u003e\n\u003c\/div\u003e\n\u003cdiv arial class=\"n6owBd awi2gc\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAIQAA\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" google=\"\" jsaction=\"\" jscontroller=\"TDBkbc\" jsuid=\"XeTChc_m\" none rgb roboto sans sans-serif style=\"font-family: \" border-bottom:=\"\" font-size:=\"\" font-weight:=\"\" margin:=\"\" text-decoration:=\"\"\u003e\n \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_n\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n  Common 1950s-1960s Models \u0026amp; Features\n  \u003c!--TgQPHd|[]--\u003e\n \u003c\/span\u003e\n \u003c!--TgQPHd|[]--\u003e\n\u003c\/div\u003e\n\u003cdiv arial class=\"\" data-bfc=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4Qi4wTegQIAxAA\" google=\"\" none rgb roboto sans sans-serif style=\"font-family: \" border-bottom:=\"\" font-size:=\"\" font-weight:=\"\" margin:=\"\" text-decoration:=\"\"\u003e\n \u003cul arial border-bottom:=\"\" class=\"KsbFXc U6u95\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"mPWODf\" jsuid=\"XeTChc_r\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 12px 0px 16px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAMQAQ\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_s\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_t\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_u\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     \u003cspan arial border-bottom:=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" data-wiz-uids=\"XeTChc_w\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"rcuQ6b:\u0026amp;XeTChc_v|npT2md\" jscontroller=\"CCvEPd\" jsuid=\"XeTChc_v\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n      \u003ca arial border-bottom:=\"\" class=\"GI370e\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAMQAg\" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4QgK4QegQIAxAC\" dotted=\"\" font-size:=\"\" font-weight:=\"\" google=\"\" href=\"https:\/\/www.google.com\/search?q=Ameco+Model+OCM-2\u0026amp;oq=1950+keyer%2C+aka+Morse+code+practice+oscillator\u0026amp;gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIGCAEQRRg9MgYIAhBFGDwyBggDEC4YQNIBBzc5OWowajeoAgCwAgA\u0026amp;sourceid=chrome\u0026amp;ie=UTF-8\u0026amp;mstk=AUtExfATvGCymRlDBjwkvcbeWSDQg3PFJiQnBtbUg-P_e4mBxN0KGMRLWxEtq6NcMTX4_My1QCFhXZDyJn4MA3MDNlC30qAdBM4VSizYqr9ZU64tPaa5sz99SNwOESxXBv4BDxa0SBQnJ0ZvNOUf-wXFXSfRqqpSrUba7m1ra4hbpucU5PQ\u0026amp;csui=3\u0026amp;ved=2ahUKEwii6oD136-UAxXIJEQIHQjpHf4QgK4QegQIAxAC\" jsuid=\"XeTChc_w\" margin:=\"\" rgb roboto sans sans-serif style=\"margin: 0px; text-decoration: underline 8% dotted rgb(99, 99, 99); border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\" underline=\"\"\u003e\n       Ameco Model OCM-2\n      \u003c\/a\u003e\n      \u003c!--TgQPHd|[]--\u003e\n     \u003c\/span\u003e\n     :\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    A popular vintage, portable unit often featuring a built-in speaker and key.\n    \u003c!--TgQPHd|[]--\u003e\n   \u003c\/span\u003e\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAMQAw\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_x\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_y\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_z\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     \u003cspan arial border-bottom:=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" data-wiz-uids=\"XeTChc_11\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"rcuQ6b:\u0026amp;XeTChc_10|npT2md\" jscontroller=\"CCvEPd\" jsuid=\"XeTChc_10\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n      \u003ca arial border-bottom:=\"\" class=\"GI370e\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAMQBA\" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4QgK4QegQIAxAE\" dotted=\"\" font-size:=\"\" font-weight:=\"\" google=\"\" href=\"https:\/\/www.google.com\/search?q=Heathkit+HD-1416\u0026amp;oq=1950+keyer%2C+aka+Morse+code+practice+oscillator\u0026amp;gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIGCAEQRRg9MgYIAhBFGDwyBggDEC4YQNIBBzc5OWowajeoAgCwAgA\u0026amp;sourceid=chrome\u0026amp;ie=UTF-8\u0026amp;mstk=AUtExfATvGCymRlDBjwkvcbeWSDQg3PFJiQnBtbUg-P_e4mBxN0KGMRLWxEtq6NcMTX4_My1QCFhXZDyJn4MA3MDNlC30qAdBM4VSizYqr9ZU64tPaa5sz99SNwOESxXBv4BDxa0SBQnJ0ZvNOUf-wXFXSfRqqpSrUba7m1ra4hbpucU5PQ\u0026amp;csui=3\u0026amp;ved=2ahUKEwii6oD136-UAxXIJEQIHQjpHf4QgK4QegQIAxAE\" jsuid=\"XeTChc_11\" margin:=\"\" rgb roboto sans sans-serif style=\"margin: 0px; text-decoration: underline 8% dotted rgb(99, 99, 99); border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\" underline=\"\"\u003e\n       Heathkit HD-1416\n      \u003c\/a\u003e\n      \u003c!--TgQPHd|[]--\u003e\n     \u003c\/span\u003e\n     :\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    A common, classic kit-built oscillator used to generate tones for code practice.\n    \u003c!--TgQPHd|[]--\u003e\n   \u003c\/span\u003e\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAMQBQ\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_12\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_13\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_14\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     \u003cspan arial border-bottom:=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" data-wiz-uids=\"XeTChc_16\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"rcuQ6b:\u0026amp;XeTChc_15|npT2md\" jscontroller=\"CCvEPd\" jsuid=\"XeTChc_15\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n      \u003ca arial border-bottom:=\"\" class=\"GI370e\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAMQBg\" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4QgK4QegQIAxAG\" dotted=\"\" font-size:=\"\" font-weight:=\"\" google=\"\" href=\"https:\/\/www.google.com\/search?q=Insuline+Corporation+of+America+%28ICA%29+%22Signa-Tone%22\u0026amp;oq=1950+keyer%2C+aka+Morse+code+practice+oscillator\u0026amp;gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIGCAEQRRg9MgYIAhBFGDwyBggDEC4YQNIBBzc5OWowajeoAgCwAgA\u0026amp;sourceid=chrome\u0026amp;ie=UTF-8\u0026amp;mstk=AUtExfATvGCymRlDBjwkvcbeWSDQg3PFJiQnBtbUg-P_e4mBxN0KGMRLWxEtq6NcMTX4_My1QCFhXZDyJn4MA3MDNlC30qAdBM4VSizYqr9ZU64tPaa5sz99SNwOESxXBv4BDxa0SBQnJ0ZvNOUf-wXFXSfRqqpSrUba7m1ra4hbpucU5PQ\u0026amp;csui=3\u0026amp;ved=2ahUKEwii6oD136-UAxXIJEQIHQjpHf4QgK4QegQIAxAG\" jsuid=\"XeTChc_16\" margin:=\"\" rgb roboto sans sans-serif style=\"margin: 0px; text-decoration: underline 8% dotted rgb(99, 99, 99); border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\" underline=\"\"\u003e\n       Insuline Corporation of America (ICA) \"Signa-Tone\"\n      \u003c\/a\u003e\n      \u003c!--TgQPHd|[]--\u003e\n     \u003c\/span\u003e\n     :\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    Another vintage, compact model frequently cited.\n    \u003c!--TgQPHd|[]--\u003e\n   \u003c\/span\u003e\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAMQBw\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_17\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_18\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_19\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     Modern Recreations:\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    The\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_1a\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     \u003cspan arial border-bottom:=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" data-wiz-uids=\"XeTChc_1c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"rcuQ6b:\u0026amp;XeTChc_1b|npT2md\" jscontroller=\"CCvEPd\" jsuid=\"XeTChc_1b\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n      \u003ca arial border-bottom:=\"\" class=\"GI370e\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAMQCA\" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4QgK4QegQIAxAI\" dotted=\"\" font-size:=\"\" font-weight:=\"\" google=\"\" href=\"https:\/\/www.google.com\/search?q=MFJ-557+Deluxe+Morse+Code+Practice+Oscillator\u0026amp;oq=1950+keyer%2C+aka+Morse+code+practice+oscillator\u0026amp;gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIGCAEQRRg9MgYIAhBFGDwyBggDEC4YQNIBBzc5OWowajeoAgCwAgA\u0026amp;sourceid=chrome\u0026amp;ie=UTF-8\u0026amp;mstk=AUtExfATvGCymRlDBjwkvcbeWSDQg3PFJiQnBtbUg-P_e4mBxN0KGMRLWxEtq6NcMTX4_My1QCFhXZDyJn4MA3MDNlC30qAdBM4VSizYqr9ZU64tPaa5sz99SNwOESxXBv4BDxa0SBQnJ0ZvNOUf-wXFXSfRqqpSrUba7m1ra4hbpucU5PQ\u0026amp;csui=3\u0026amp;ved=2ahUKEwii6oD136-UAxXIJEQIHQjpHf4QgK4QegQIAxAI\" jsuid=\"XeTChc_1c\" margin:=\"\" rgb roboto sans sans-serif style=\"margin: 0px; text-decoration: underline 8% dotted rgb(99, 99, 99); border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\" underline=\"\"\u003e\n       MFJ-557 Deluxe Morse Code Practice Oscillator\n      \u003c\/a\u003e\n      \u003c!--TgQPHd|[]--\u003e\n     \u003c\/span\u003e\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    is a modern, readily available unit that mimics the traditional heavy-duty, straight-key design of that era.\n    \u003c!--TgQPHd|[]--\u003e\n   \u003c\/span\u003e\n   [\n   \u003ca href=\"https:\/\/www.ebay.com\/shop\/code-practice-oscillator?_nkw=code+practice+oscillator\"\u003e\n    1\n   \u003c\/a\u003e\n   ,\n   \u003ca href=\"https:\/\/www.ebay.ca\/sch\/i.html?_nkw=morse+code+practice+oscillator+kit\"\u003e\n    4\n   \u003c\/a\u003e\n   ]\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003c!--TgQPHd|[]--\u003e\n \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv arial class=\"\" data-bfc=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4Qi4wTegQIBBAA\" google=\"\" none rgb roboto sans sans-serif style=\"font-family: \" border-bottom:=\"\" font-size:=\"\" font-weight:=\"\" margin:=\"\" text-decoration:=\"\"\u003e\n \u003cdiv arial border-bottom:=\"\" class=\"n6owBd awi2gc\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAQQAQ\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"TDBkbc\" jsuid=\"XeTChc_1k\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 12px 0px 16px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n  \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_1l\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   Key Characteristics\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/span\u003e\n  \u003c!--TgQPHd|[]--\u003e\n \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv arial class=\"\" data-bfc=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4Qi4wTegQIBRAA\" google=\"\" none rgb roboto sans sans-serif style=\"font-family: \" border-bottom:=\"\" font-size:=\"\" font-weight:=\"\" margin:=\"\" text-decoration:=\"\"\u003e\n \u003cul arial border-bottom:=\"\" class=\"KsbFXc U6u95\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"mPWODf\" jsuid=\"XeTChc_1p\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 12px 0px 16px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAUQAQ\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_1q\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_1r\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_1s\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     Mechanism:\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    When the key is closed, it completes a circuit, producing an audio tone.\n    \u003c!--TgQPHd|[]--\u003e\n   \u003c\/span\u003e\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAUQAg\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_1t\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_1u\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_1v\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     Components:\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    Often includes a transistor (or tube in very early models) and an RC (resistor-capacitor) circuit to generate the tone.\n    \u003c!--TgQPHd|[]--\u003e\n   \u003c\/span\u003e\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAUQAw\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_1w\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_1x\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_1y\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     Purpose:\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    Essential for training CW (continuous wave) operators to maintain rhythm and proper spacing\n   \u003c\/span\u003e\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003c!--TgQPHd|[]--\u003e\n \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv arial class=\"\" data-bfc=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4Qi4wTegQIBhAA\" google=\"\" none rgb roboto sans sans-serif style=\"font-family: \" border-bottom:=\"\" font-size:=\"\" font-weight:=\"\" margin:=\"\" text-decoration:=\"\"\u003e\n \u003cdiv arial border-bottom:=\"\" class=\"n6owBd awi2gc\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAYQAQ\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"TDBkbc\" jsuid=\"XeTChc_24\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 12px 0px 16px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n  \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_25\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   Finding Vintage Items\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/span\u003e\n  \u003c!--TgQPHd|[]--\u003e\n \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv arial class=\"\" data-bfc=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4Qi4wTegQIBxAA\" google=\"\" none rgb roboto sans sans-serif style=\"font-family: \" border-bottom:=\"\" font-size:=\"\" font-weight:=\"\" margin:=\"\" text-decoration:=\"\"\u003e\n \u003cul arial border-bottom:=\"\" class=\"KsbFXc U6u95\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"mPWODf\" jsuid=\"XeTChc_29\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 12px 0px 16px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAcQAQ\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_2a\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_2b\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_2c\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     eBay:\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    A primary source for used, vintage units from companies like Ameco, Heathkit, or Claricon.\n    \u003c!--TgQPHd|[]--\u003e\n   \u003c\/span\u003e\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003cli arial border-bottom:=\"\" class=\"Z1qcYe\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAcQAg\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"oSLmPe\" jsuid=\"XeTChc_2d\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px 0px 12px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n   \u003cspan arial border-bottom:=\"\" class=\"T286Pc\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"fly6D\" jsuid=\"XeTChc_2e\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n    \u003cspan arial border-bottom:=\"\" class=\"Yjhzub\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"zYmgkd\" jsuid=\"XeTChc_2f\" margin:=\"\" none rgb roboto sans sans-serif style=\"font-weight: 600; margin: 0px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n     Hamfests:\n     \u003c!--TgQPHd|[]--\u003e\n    \u003c\/span\u003e\n    Often available at local amateur radio swap meets and flea markets.\n   \u003c\/span\u003e\n   \u003c!--TgQPHd|[]--\u003e\n  \u003c\/li\u003e\n  \u003c!--TgQPHd|[]--\u003e\n \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv arial class=\"\" data-bfc=\"\" data-copy-service-computed-style=\"font-family: \" data-processed=\"true\" data-ved=\"2ahUKEwii6oD136-UAxXIJEQIHQjpHf4Qi4wTegQICBAA\" google=\"\" none rgb roboto sans sans-serif style=\"font-family: \" border-bottom:=\"\" font-size:=\"\" font-weight:=\"\" margin:=\"\" text-decoration:=\"\"\u003e\n \u003cdiv arial border-bottom:=\"\" class=\"n6owBd awi2gc\" data-copy-service-computed-style=\"font-family: \" data-hveid=\"CAgQAQ\" data-processed=\"true\" data-sfc-cb=\"\" data-sfc-cp=\"\" data-sfc-root=\"c\" font-size:=\"\" font-weight:=\"\" google=\"\" jsaction=\"\" jscontroller=\"TDBkbc\" jsuid=\"XeTChc_2l\" margin:=\"\" none rgb roboto sans sans-serif style=\"margin: 12px 0px 16px; border-bottom: 0px rgb(10, 10, 10);\" text-decoration:=\"\"\u003e\n  Vintage units are sold in \"as-is\" condition and may require minor repairs (like replacing battery clips or cleaning contacts).\n \u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Unbranded","offers":[{"title":"Default Title","offer_id":54223069151537,"sku":null,"price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/8249\/6561\/files\/10_93fd9671-30a1-4525-ac48-8b32a17783c5.png?v=1779040814","url":"https:\/\/californiasellerstore.com\/products\/1950-keyer-military-aka-morse-code-practice-oscillator-cpo","provider":"CaliforniaSellerStore","version":"1.0","type":"link"}