{"product_id":"1939-caa-type-tzg-fan-marker-transmitter-manual-federal-telegraph","title":"1939 CAA Type TZG Fan Marker Transmitter Manual Federal Telegraph","description":"\u003cp\u003e\u003cspan\u003eOriginal instruction manual for the \u003c\/span\u003e\u003cspan\u003eType TZG Dual Ultra-High-Frequency Fan Marker Transmitter\u003c\/span\u003e\u003cspan\u003e, operating at \u003c\/span\u003e\u003cspan\u003e75 Mc. (75 MHz)\u003c\/span\u003e\u003cspan\u003e and manufactured by the \u003c\/span\u003e\u003cspan\u003eFederal Telegraph Company, Newark, New Jersey\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe manual was manufactured for the \u003c\/span\u003e\u003cspan\u003eU.S. Civil Aeronautics Authority\u003c\/span\u003e\u003cspan\u003e under:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eContract CAA-456\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eOrder No. 40-1621\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eDated October 10, 1939\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThis is an early aviation radio-navigation technical manual dating immediately before U.S. entry into World War II. Fan marker transmitters were part of the early radio navigation and instrument-landing infrastructure used to provide position indications to aircraft.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOf particular interest, this example includes \u003c\/span\u003e\u003cspan\u003eperiod 1957 correspondence from the U.S. Department of Commerce, Civil Aeronautics Administration\u003c\/span\u003e\u003cspan\u003e, concerning a requested copy of the TZG instruction book. One letter dated \u003c\/span\u003e\u003cspan\u003eMarch 28, 1957\u003c\/span\u003e\u003cspan\u003e was sent to Engineering Associates in Dayton, Ohio and identifies the enclosed publication as the \u003c\/span\u003e\u003cspan\u003eTZG Fan Marker Transmitter instruction book\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAdditional correspondence dated \u003c\/span\u003e\u003cspan\u003eMay 27, 1957\u003c\/span\u003e\u003cspan\u003e discusses the return of a TZG instruction manual that had been loaned for evaluation, providing unusual period provenance associated with this technical material.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFREE SHIPPING\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e#7\u003c\/span\u003e\u003c\/p\u003e","brand":"Whiskey Rebellion Antiques","offers":[{"title":"Default Title","offer_id":43467229200461,"sku":null,"price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/9229\/8829\/files\/IMG-1414_4015716c-ec11-4c7b-bbf2-ff59d8b282cb.heic?v=1786727996","url":"https:\/\/whiskeyrebellionantiques.com\/products\/1939-caa-type-tzg-fan-marker-transmitter-manual-federal-telegraph","provider":"Whiskey Rebellion Antiques","version":"1.0","type":"link"}