{"id":42721,"date":"2020-04-10T08:53:30","date_gmt":"2020-04-10T12:53:30","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=42721"},"modified":"2020-04-10T08:54:12","modified_gmt":"2020-04-10T12:54:12","slug":"any-experience-using-the-t2fd-antenna","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2020\/04\/any-experience-using-the-t2fd-antenna\/","title":{"rendered":"Any experience using the T2FD antenna–?"},"content":{"rendered":"
\"\"<\/a>

The T2FD Antenna (Source: Wikimedia Commons)<\/p><\/div>\r\n

Many thanks to SWLing Post<\/em> contributor, Grayhat, who has recently been on a mission to create a low-cost SDR setup while sheltering at home due to Covid-19 restrictions. While exploring antennas he sent the following inquiry:<\/p>\r\n

\r\n

I recently found some information about the so-called Tilted Terminated Folded Dipole (T2FD)<\/strong> antenna which was apparently developed for military use as a wideband, general purpose one (which can mean if it isn’t efficient, simply throw some more KW at it).\u00a0 \u00a0But for receiving, the antenna didn’t seem bad to me, at least based on the info I found.<\/p>\r\n

In most (if not all) ham installations of the antenna, the T2FD is used in a “vertical” setup–that is, one wire above the other. When looking at military docs, the antenna is in “horizontal” setup, that is, wires parallel to ground. Looking at a 3D lobes simulation of the antenna, the pattern for a “vertical” one seems to be a “cloud warmer” with the most radiating lobe going down toward the feedline. If that’s true, this would mean that an “horizontal” T2FD should have its most pronounced lobe at the feedline side. Perhaps “vertical” installations of the T2FD could go from “works well” to “WOW” just flipping the wires–?<\/p>\r\n

Do you think and SWLing Post readers may have info or experience with the T2FD antenna they could share?<\/p>\r\n<\/blockquote>\r\n

If you have any experience using or building the T2FD antenna, please feel free to comment!\u00a0<\/a><\/p>\r\n","protected":false},"excerpt":{"rendered":"

Many thanks to SWLing Post contributor, Grayhat, who has recently been on a mission to create a low-cost SDR setup while sheltering at home due to Covid-19 restrictions. While exploring antennas he sent the following inquiry: I recently found some information about the so-called Tilted Terminated Folded Dipole (T2FD) antenna which was apparently developed for […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3607,3],"tags":[7880,8427,8428],"class_list":["post-42721","post","type-post","status-publish","format-standard","hentry","category-antennas","category-news","tag-grayhat","tag-t2fd","tag-tilted-terminated-folded-dipole"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-b73","jetpack-related-posts":[{"id":46679,"url":"https:\/\/swling.com\/blog\/2020\/12\/how-to-build-a-simple-linear-loaded-dipole-for-low-noise-shortwave-radio-listening\/","url_meta":{"origin":42721,"position":0},"title":"How to Build a Simple Linear-Loaded Dipole for Low-Noise Shortwave Radio Listening","author":"Thomas","date":"December 3, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor and RX antenna guru, Grayhat, for another excellent guest post focusing on compact, low-profile urban antennas: A linear loaded dipole for the SWL by Grayhat What follows is the description of an antenna which may allow to obtain good performances even in limited space,\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/11\/Map.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/11\/Map.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/11\/Map.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/11\/Map.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/11\/Map.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":42122,"url":"https:\/\/swling.com\/blog\/2020\/02\/from-the-cia-archives-an-hf-spaced-loop-antenna-for-direction-finding\/","url_meta":{"origin":42721,"position":1},"title":"From the CIA Archives: An HF Spaced Loop Antenna for Direction Finding","author":"Thomas","date":"February 27, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Grayhat, who shares the following: I stumbled upon a document I found in the \"CIA reading room\": https:\/\/www.cia.gov\/library\/readingroom\/docs\/CIA-RDP76-00451R000200010013-1.pdf In short, the document, titled \"HF SPACED LOOP ANTENNA\" and dating back to 1967, describes the design of a \"direction finding\" antenna used to find an\u2026","rel":"","context":"In "Antennas"","block_context":{"text":"Antennas","link":"https:\/\/swling.com\/blog\/category\/antennas\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/02\/CIA-Loop-antenna.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/02\/CIA-Loop-antenna.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/02\/CIA-Loop-antenna.jpeg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":49992,"url":"https:\/\/swling.com\/blog\/2021\/08\/grayhats-ncpl-noise-cancelling-passive-loop-antenna-tweak\/","url_meta":{"origin":42721,"position":2},"title":"Grayhat’s NCPL (Noise-Cancelling Passive Loop) antenna “tweak”","author":"Thomas","date":"August 15, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor, Grayhat, who shares the following modification he made to a Noise-Cancelling Passive Loop antenna last year. He's kindly allowed me to share his notes here, but apologized that at the time, he didn't take photos of the project along the way and recycled many\u2026","rel":"","context":"In "Antennas"","block_context":{"text":"Antennas","link":"https:\/\/swling.com\/blog\/category\/antennas\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/08\/moebius.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/08\/moebius.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/08\/moebius.jpeg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":14104,"url":"https:\/\/swling.com\/blog\/2015\/07\/radio-cook-islands-guys-1993-visit-and-recordings\/","url_meta":{"origin":42721,"position":3},"title":"Radio Cook Islands: Guy’s 1993 recordings","author":"Thomas","date":"July 19, 2015","format":false,"excerpt":"Many thanks to SWLing Post contributor, Guy Atkins, for\u00a0the following guest post: Radio Cook Islands by Guy Atkins In 1993 I was fortunate to have the opportunity to visit Rarotonga with my wife, courtesy of a nice award through my company which afforded me an all-expenses-paid trip anywhere we'd like\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"(Photo: Guy Atkins)","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/R.-Cook-Islands-Studio-1993-1024x710.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/R.-Cook-Islands-Studio-1993-1024x710.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/R.-Cook-Islands-Studio-1993-1024x710.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":14830,"url":"https:\/\/swling.com\/blog\/2015\/09\/ampegon-introduces-new-folded-sw-and-mw-antenna-system-for-broadcasters\/","url_meta":{"origin":42721,"position":4},"title":"Ampegon introduces new folded SW and MW antenna system for broadcasters","author":"Thomas","date":"September 15, 2015","format":false,"excerpt":"(Source: Ampegon press release) Ampegon Introduces New Folded Monopole Mediumwave Antenna System IBC 2015, September 10, Amsterdam. Ampegon, leading supplier of full range mediumwave equipment up to 1200 kW is introducing a folded monopole 50 kW antenna system with new design concept and optimized antenna structure that brings many benefits\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"img":{"alt_text":"image_manager__fader_3.2_ampegon_folded_monopole_mw_antenna","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/09\/image_manager__fader_3.2_ampegon_folded_monopole_mw_antenna.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":55884,"url":"https:\/\/swling.com\/blog\/2023\/02\/loop-on-ground-antenna-part-3-toms-low-noise-low-profile-portable-antenna-evolves\/","url_meta":{"origin":42721,"position":5},"title":"Loop-On-Ground Antenna Part 3: Tom’s low-noise, low-profile, portable antenna evolves","author":"Thomas","date":"February 19, 2023","format":false,"excerpt":"Loop on Ground Antenna Part 3 (using multiconductor wire) by TomL It dawned on me recently, perhaps due to sloppy thinking or unintended distractions, that I never wrote about my modified Loop on Ground (LoG) receive antenna that I use at parks and such.\u00a0 For over a year now, I\u2026","rel":"","context":"In "Antennas"","block_context":{"text":"Antennas","link":"https:\/\/swling.com\/blog\/category\/antennas\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/02\/KBSQSL.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/02\/KBSQSL.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/02\/KBSQSL.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/02\/KBSQSL.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/42721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=42721"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/42721\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=42721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=42721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=42721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}