{"product_id":"mfj-rtty-cw-computer-interface-1224","title":"MFJ RTTY\/CW Computer Interface Model MFJ-1224 (Pre-Owned)","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"relative w-full overflow-visible\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:c17d0698-ffdd-4656-bb15-9d1b31b9b545-5\" data-turn-id-container=\"request-WEB:c17d0698-ffdd-4656-bb15-9d1b31b9b545-5\" data-testid=\"conversation-turn-12\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"5ee6f229-fd31-4340-bf79-85b89182c522\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003ch2 data-section-id=\"wyzw30\" data-start=\"0\" data-end=\"60\"\u003eMFJ RTTY\/CW Computer Interface Model MFJ-1224 (Pre-Owned)\u003c\/h2\u003e\n\u003cp data-start=\"62\" data-end=\"509\"\u003eThe \u003cstrong data-start=\"66\" data-end=\"105\"\u003eMFJ-1224 RTTY\/CW Computer Interface\u003c\/strong\u003e is a classic digital-mode interface designed for amateur radio operators who want to connect their transceiver to a computer for \u003cstrong data-start=\"235\" data-end=\"273\"\u003eRTTY, ASCII, and CW communications\u003c\/strong\u003e. This versatile interface converts received CW or AFSK tones into computer-compatible TTL signals and also converts computer-generated signals into transmit audio or CW keying for on-air operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"511\" data-end=\"816\"\u003ePopular among vintage digital-mode enthusiasts and experimenters, the MFJ-1224 supports a wide variety of older computer systems and ham radio software packages, making it an excellent accessory for retro amateur radio stations, collectors, or digital-mode hobbyists. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"19zqy0x\" data-start=\"818\" data-end=\"830\"\u003eFeatures\u003c\/h3\u003e\n\u003cul data-start=\"831\" data-end=\"1261\"\u003e\n\u003cli data-section-id=\"1kx4xmj\" data-start=\"831\" data-end=\"875\"\u003eSupports RTTY, ASCII, and CW digital modes\u003c\/li\u003e\n\u003cli data-section-id=\"1367bmw\" data-start=\"876\" data-end=\"934\"\u003eInterfaces radios with compatible computers and software\u003c\/li\u003e\n\u003cli data-section-id=\"1dw1hpb\" data-start=\"935\" data-end=\"991\"\u003eConverts CW\/AFSK audio into TTL-level computer signals\u003c\/li\u003e\n\u003cli data-section-id=\"c97mcl\" data-start=\"992\" data-end=\"1041\"\u003eProvides CW keying and AFSK transmit capability\u003c\/li\u003e\n\u003cli data-section-id=\"1xbx9i2\" data-start=\"1042\" data-end=\"1098\"\u003eAdjustable RTTY shift settings (170Hz \/ 425Hz \/ 850Hz)\u003c\/li\u003e\n\u003cli data-section-id=\"1gfza63\" data-start=\"1099\" data-end=\"1142\"\u003eBuilt-in tuning and phase-lock indicators\u003c\/li\u003e\n\u003cli data-section-id=\"1b7l8p\" data-start=\"1143\" data-end=\"1181\"\u003eDirect and grid-block keying outputs\u003c\/li\u003e\n\u003cli data-section-id=\"zao7eg\" data-start=\"1182\" data-end=\"1261\"\u003eCompatible with many vintage ham radio software packages and computer systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"ucz99x\" data-start=\"1263\" data-end=\"1287\"\u003eTypical Applications\u003c\/h3\u003e\n\u003cul data-start=\"1288\" data-end=\"1466\"\u003e\n\u003cli data-section-id=\"459hgj\" data-start=\"1288\" data-end=\"1326\"\u003eAmateur radio digital-mode operation\u003c\/li\u003e\n\u003cli data-section-id=\"lntfin\" data-start=\"1327\" data-end=\"1355\"\u003eRTTY and CW communications\u003c\/li\u003e\n\u003cli data-section-id=\"1789xsj\" data-start=\"1356\" data-end=\"1396\"\u003eVintage computer and radio interfacing\u003c\/li\u003e\n\u003cli data-section-id=\"1wwsltf\" data-start=\"1397\" data-end=\"1433\"\u003eHF and VHF digital experimentation\u003c\/li\u003e\n\u003cli data-section-id=\"vbazhp\" data-start=\"1434\" data-end=\"1466\"\u003eRetro ham radio station setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1yl5694\" data-start=\"1468\" data-end=\"1486\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul data-start=\"1487\" data-end=\"1715\"\u003e\n\u003cli data-section-id=\"9h1xr6\" data-start=\"1487\" data-end=\"1523\"\u003eModes Supported: RTTY \/ ASCII \/ CW\u003c\/li\u003e\n\u003cli data-section-id=\"q07gok\" data-start=\"1524\" data-end=\"1547\"\u003eInput Voltage: 12 VDC\u003c\/li\u003e\n\u003cli data-section-id=\"1a3z5ip\" data-start=\"1548\" data-end=\"1586\"\u003eTTL-level computer interface outputs\u003c\/li\u003e\n\u003cli data-section-id=\"6g8u8i\" data-start=\"1587\" data-end=\"1647\"\u003eAudio input\/output connections for transceiver interfacing\u003c\/li\u003e\n\u003cli data-section-id=\"1xegob4\" data-start=\"1648\" data-end=\"1684\"\u003eAdjustable PLL and filter controls\u003c\/li\u003e\n\u003cli data-section-id=\"rp1t6m\" data-start=\"1685\" data-end=\"1715\"\u003eMetal enclosure construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1uef3h1\" data-start=\"1717\" data-end=\"1730\"\u003eCondition\u003c\/h3\u003e\n\u003cul data-start=\"1731\" data-end=\"1929\"\u003e\n\u003cli data-section-id=\"zoue0p\" data-start=\"1731\" data-end=\"1760\"\u003ePre-Owned \/ Previously used\u003c\/li\u003e\n\u003cli data-section-id=\"vkcndc\" data-start=\"1761\" data-end=\"1801\"\u003eMay show cosmetic wear from normal use\u003c\/li\u003e\n\u003cli data-section-id=\"733xyz\" data-start=\"1802\" data-end=\"1868\"\u003eUntested accessories or cables may not be included unless stated\u003c\/li\u003e\n\u003cli data-section-id=\"idg4qw\" data-start=\"1869\" data-end=\"1929\"\u003eIdeal for restoration, vintage operation, or collector use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1931\" data-end=\"2161\"\u003eThe MFJ-1224 remains a respected interface among amateur radio digital-mode operators for its flexibility, classic design, and compatibility with a wide range of legacy computer-radio systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cdiv class=\"contents\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"MFJ","offers":[{"title":"Default Title","offer_id":53152051691817,"sku":"modelmfj-1224","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0887\/2670\/0329\/files\/MFJ_RTTY_CW_Computer_Interface_Model_MFJ-1224_Pre-Owned.jpg?v=1778598900","url":"https:\/\/tekshack.com\/products\/mfj-rtty-cw-computer-interface-1224","provider":"TekShack","version":"1.0","type":"link"}