{"abstract":"This notice announces the availability of and request comments on a proposed Technical Standard Order (TSO)-C170, HF Radio Communications Transceiver Equipment Operating within the Radio Frequency Range 1.5 to 30.00 Megahertz. The proposed TSO tells manufacturers seeking TSO authorization or letter of design approval what minimum performance standards (MPS) their HF radio communications transceiver equipment must first meet for approval and identification with the applicable TSO markings.","action":"Notice of availability and requests for public comment.","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation Department","id":492,"url":"https://www.federalregister.gov/agencies/transportation-department","json_url":"https://www.federalregister.gov/api/v1/agencies/492","parent_id":null,"slug":"transportation-department"},{"raw_name":"Federal Aviation Administration","name":"Federal Aviation Administration","id":159,"url":"https://www.federalregister.gov/agencies/federal-aviation-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/159","parent_id":492,"slug":"federal-aviation-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2004/05/20/04-11453.html","cfr_references":[],"citation":"69 FR 29159","comment_url":null,"comments_close_on":"2004-06-18","correction_of":null,"corrections":[],"dates":"Submit comments on or before June 18, 2004.","disposition_notes":null,"docket_ids":[],"dockets":[],"document_number":"04-11453","effective_on":null,"end_page":29160,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2004/05/20/04-11453.xml","html_url":"https://www.federalregister.gov/documents/2004/05/20/04-11453/technical-standard-order-c170-high-frequency-hf-radio-communications-transceiver-equipment-operating","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/04-11453?publication_date=2004-05-20","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2004-05-20/04-11453/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":737,"last_updated":"2026-04-04 12:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2004-05-20/pdf/04-11453.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2004-05-20","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2004/05/20/04-11453.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-11-12T12:26:15Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":29159,"subtype":null,"title":"Technical Standard Order-C170, High Frequency (HF) Radio Communications Transceiver Equipment Operating Within the Radio Frequency Range 1.5 to 30.00 Megahertz","toc_doc":"High frequency radio communications transceiver equipment operating within radio frequency range 1.5 to 30.00 megahertz","toc_subject":"Reports and guidance documents; availability, etc.:","topics":[],"type":"Notice","volume":69}