{"id":59851,"date":"2024-05-27T11:37:49","date_gmt":"2024-05-27T15:37:49","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=59851"},"modified":"2024-12-19T07:22:38","modified_gmt":"2024-12-19T11:22:38","slug":"kostas-releases-the-nr-1-noise-blanker","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2024\/05\/kostas-releases-the-nr-1-noise-blanker\/","title":{"rendered":"Kostas presents the NR-1 Noise Blanker!"},"content":{"rendered":"<p><b><b>Many thanks to <em>SWLing Post<\/em> contributor, <a href=\"https:\/\/swling.com\/blog\/tag\/kostas-sv3ora\/\">Kostas (SV3ORA)<\/a>, for sharing the following post which originally appeared on <a style=\"font-weight: bold;\" href=\"http:\/\/qrp.gr\/nr1\" target=\"_blank\" rel=\"noopener\">his website<\/a><b>:<\/b><\/b><\/b><\/p>\n<p><strong><em>Update (19 Dec 2024):<\/em> ELISYS\u00a0 now sells Kostas&#8217; NR-1 noise blanker and ships worldwide. <a href=\"http:\/\/shop.elisys.gr\/products\/nr1\/\" target=\"_blank\" rel=\"noopener\">Check it out by clicking here.<\/a><\/strong><\/p>\n<hr \/>\n<h1 style=\"padding-left: 40px;\"><b>The NR-1, a revolutionary noise blanker that works directly on the antenna!<\/b><\/h1>\n<p style=\"padding-left: 40px;\">I designed my own noise blanker because:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li>I was tired of that HF noise that could not be beaten otherwise.<\/li>\n<li>I wanted to remove it before it gets into my transceiver.<\/li>\n<li>I could not install a separate \u201cnoise\u201d antenna\/coaxial for diversity.<\/li>\n<li>I wanted to remove noise interference from any direction.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><a href=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/front.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-59853\" src=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/front.jpg\" alt=\"\" width=\"863\" height=\"342\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/front.jpg 863w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/front-300x119.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/front-768x304.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/front-624x247.jpg 624w\" sizes=\"auto, (max-width: 863px) 100vw, 863px\" \/><\/a><\/p>\n<p style=\"padding-left: 40px;\"><b>NR-1 is a revolutionary Noise Blanker which is the result of two-years of development and extensive testing by Kostas sv3ora.<\/b><\/p>\n<p style=\"padding-left: 40px;\">NR-1 works directly at the antenna. This has significant advantages over the classic noise blankers which work at the intermediate stages of the receivers. It does not require a second &#8220;noise&#8221; antenna for its operation.<\/p>\n<p style=\"padding-left: 40px;\">Furthermore, it is not based on cutting-off of amplifiers, unlike common noise blankers<br \/>\ndo.<\/p>\n<p style=\"padding-left: 40px;\">Because of these, the NR-1 is superior, compared tocommon internal Noise blankers of radios:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>NR-1 removes noise before it even reaches the receiver<\/strong>. Thus, the front-end RF<br \/>\nstages of the receiver are unaffected by noise, unlike a common noise blanker<br \/>\nwhich removes the noise after it has first passed through the internal circuits<br \/>\nof the receiver.<\/li>\n<li><strong>NR-1 removes high-level, high-repetition-rate noises<\/strong> that common noise blankers<br \/>\nusually cannot cope with.<\/li>\n<li><strong>NR-1 is not affected by strong near-by signals.<\/strong> Instead, common noise blankers<br \/>\nperform poorly when there are strong near-by signals and they distort the signal of the station we want to listen.<\/li>\n<li><strong>NR-1 can be used by many radios.<\/strong> Because it is an external device, it can be<br \/>\nconnected to various radios\/receivers without the need to modify them.<\/li>\n<li><strong>NR-1 has a built-in 8-band preselector <\/strong>and helps eliminate intermodulation (birdies)<br \/>\ncaused by strong local medium and shortwave stations, on RF direct sampling<br \/>\nradios (eg IC-7300). The preselector is relatively wideband and does not affect<br \/>\nthe sensitivity or the waterfall spectrum in the amateur radio bands.<\/li>\n<li><strong>NR-1 has built-in variable gain preamplifier and variable attenuator.<\/strong> Preamplification is<br \/>\nparticularly useful in the high frequency bands, where some radios have limited<br \/>\nsensitivity. Variable attenuation helps to reduce band noise for more<br \/>\ncomfortable listening to mid\/high strength stations.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><a href=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/back.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-59852\" src=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/back.jpg\" alt=\"\" width=\"855\" height=\"328\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/back.jpg 855w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/back-300x115.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/back-768x295.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2024\/05\/back-624x239.jpg 624w\" sizes=\"auto, (max-width: 855px) 100vw, 855px\" \/><\/a><\/p>\n<p style=\"padding-left: 40px;\"><b>Comparison of the NR-1 with other noise removal systems (eg. QRM eliminator, X-phase etc):<br \/>\n<\/b><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>NR-1 does not require a second (noise) antenna\/coaxial-line to operate.<\/strong> Unlike QRM<br \/>\neliminators, NR-1 does not require an additional &#8220;noise&#8221; antenna and<br \/>\ntherefore no second coaxial cable out of the shack. The main transmit and<br \/>\nreceive antenna you are already using is sufficient.<\/li>\n<li><strong>NR-1 is easy to set up.<\/strong> In contrast, QRM eliminators require systematic testing of<br \/>\nvarious noise antennas in different locations to perform satisfactorily.<\/li>\n<li><strong>NR-1 removes noise from every direction simultaneously.<\/strong> In contrast, QRM<br \/>\neliminators, depending on the noise antenna setup and their configuration,<br \/>\nremove noise from one direction only each time. If the noise originates or<br \/>\n&#8220;travels&#8221; through cables and reaches the antenna from different<br \/>\ndirections, QRM eliminators do not perform well.<\/li>\n<li><strong>NR-1 removes more than one noise source<\/strong>\u00a0simultaneously because its principle of<br \/>\noperation is not related to the phase of the noise.<\/li>\n<li><b>NR-1 does not require constant adjustment. <\/b>Once set for one band, it usually does not need to be reset. In contrast, QRM eliminators require resetting every few tens of KHz or so.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\"><span style=\"font-weight: 400;\">Kostas has documented all the details of the NR-1 for his own future reference in his<\/span> <a href=\"http:\/\/qrp.gr\/nr1\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">page.<\/span><\/a><\/p>\n<p style=\"padding-left: 40px;\"><span style=\"font-weight: 400;\">He has also created some<\/span> <a href=\"https:\/\/www.youtube.com\/playlist?list=PL0KwxiKZqJ1TzQpscf3voh5CR1c30WLD_\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">YOUTUBE videos<\/span><\/a> <span style=\"font-weight: 400;\">as demonstrations of the operation and the effectiveness of this antenna noise blanker.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to SWLing Post contributor, Kostas (SV3ORA), for sharing the following post which originally appeared on his website: Update (19 Dec 2024): ELISYS\u00a0 now sells Kostas&#8217; NR-1 noise blanker and ships worldwide. Check it out by clicking here. The NR-1, a revolutionary noise blanker that works directly on the antenna! I designed my own [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"closed","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":[4199,545,836,3,196,43],"tags":[8721,10537,10536],"class_list":["post-59851","post","type-post","status-publish","format-standard","hentry","category-accessories","category-ham-radio","category-new-products","category-news","category-qrm","category-shortwave-radio","tag-kostas-sv3ora","tag-noise-blanker","tag-nr-1"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-fzl","jetpack-related-posts":[{"id":33325,"url":"https:\/\/swling.com\/blog\/2018\/07\/kenwood-r-2000-lukes-simple-fix-for-a-frozen-encoder\/","url_meta":{"origin":59851,"position":0},"title":"Kenwood R-2000: Luke&#8217;s simple fix for a frozen encoder","author":"Thomas","date":"July 29, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Luke Perry, who writes: Hi Thomas, I thought I would share with the people on the SWLing Post my new radio purchase. I needed a receiver with a noise blanker as you might (or might not) recall my issue that I was having with\u2026","rel":"","context":"In &quot;How To&quot;","block_context":{"text":"How To","link":"https:\/\/swling.com\/blog\/category\/how-to\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/Kenwood-R-2000-Internal.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/Kenwood-R-2000-Internal.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/Kenwood-R-2000-Internal.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/Kenwood-R-2000-Internal.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":30760,"url":"https:\/\/swling.com\/blog\/2018\/02\/can-you-help-luke-identify-this-radio-noise\/","url_meta":{"origin":59851,"position":1},"title":"Can you help Luke identify this radio noise?","author":"Thomas","date":"February 6, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Luke Perry, who writes: I am experiencing a issue with my shortwave reception at my part-time home. I have been helping out my mother so I have brought over my Sony portable, along with the Sony active antenna. I have a constant \u2018clicking\u2019 sound\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/02\/Sony-SW100-Dial-6160-Loomish.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/02\/Sony-SW100-Dial-6160-Loomish.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/02\/Sony-SW100-Dial-6160-Loomish.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/02\/Sony-SW100-Dial-6160-Loomish.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":44627,"url":"https:\/\/swling.com\/blog\/2020\/08\/kostas-yaesu-frg-7-adjustment-that-improves-opposite-sideband-rejection\/","url_meta":{"origin":59851,"position":2},"title":"Kostas&#8217; Yaesu FRG-7 adjustment that improves opposite sideband rejection","author":"Thomas","date":"August 4, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Kostas (SV3ORA), who shares the following video and writes: In this 7.8Mb video (attached) is my solution for \"converting\" the Yaesu FRG-7 for single signal reception on SSB: https:\/\/vimeo.com\/444218932 Not a mod actually, no additional filters, no soldering of any kind. Just tune the\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/07\/Yaesu-FRG-7.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/07\/Yaesu-FRG-7.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/07\/Yaesu-FRG-7.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/07\/Yaesu-FRG-7.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":17764,"url":"https:\/\/swling.com\/blog\/2016\/03\/car-shortwave-radio\/","url_meta":{"origin":59851,"position":3},"title":"Car Shortwave Radio","author":"Robert Gulley","date":"March 11, 2016","format":false,"excerpt":"Tonight on Allan Weiner Worldwide (WBCQ\u00a0 7490 kHz coming in beautifully on my FRG-7) Allan mentioned a shortwave radio converter for car radios. The package uses a small box which plugs into the cigarette lighter socket and can either use an antenna made for the converter or an antenna supplied\u2026","rel":"","context":"In &quot;Mobile Shortwave&quot;","block_context":{"text":"Mobile Shortwave","link":"https:\/\/swling.com\/blog\/category\/mobile-shortwave\/"},"img":{"alt_text":"sw_car_audio","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/sw_car_audio.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/sw_car_audio.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/sw_car_audio.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/sw_car_audio.jpg?resize=700%2C400 2x"},"classes":[]},{"id":52956,"url":"https:\/\/swling.com\/blog\/2022\/06\/kostas-explores-an-alternative-to-morse-code-used-in-prisons-with-roots-in-ancient-greece\/","url_meta":{"origin":59851,"position":4},"title":"Kostas explores an alternative to Morse Code that&#8217;s been used in prisons, with roots in ancient Greece","author":"Thomas","date":"June 8, 2022","format":false,"excerpt":"Many thanks to\u00a0SWLing Post\u00a0contributor, Kostas (SV3ORA), for sharing the following guest post which originally appeared\u00a0on his radio website: TAP: A Morse alternative mode for the HAM, with no need for training by Kostas (SV3ORA) Introduction The thinking of this new mode, came to me when someone posted that he quit\u2026","rel":"","context":"In &quot;Ham Radio&quot;","block_context":{"text":"Ham Radio","link":"https:\/\/swling.com\/blog\/category\/ham-radio\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/06\/key.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/06\/key.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/06\/key.jpeg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":59492,"url":"https:\/\/swling.com\/blog\/2024\/04\/kostas-improves-the-contrast-on-his-frg-7-digital-display\/","url_meta":{"origin":59851,"position":5},"title":"Kostas improves the contrast on his FRG-7 digital display","author":"Thomas","date":"April 11, 2024","format":false,"excerpt":"Many thanks to\u00a0SWLing Post\u00a0contributor, Kostas (SV3ORA), for sharing the following guest post which originally appeared\u00a0on his radio website: FRG-7 digital display contrast improvement by Kostas (SV3ORA) The\u00a0FRG-7 digital\u00a0by Marcel Jacobs PA8MA, is a very well thought modification KIT for the Yaesu FRG-7 receiver. It really adds to it one of\u2026","rel":"","context":"In &quot;Guest Posts&quot;","block_context":{"text":"Guest Posts","link":"https:\/\/swling.com\/blog\/category\/guest-posts\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/04\/mod1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/04\/mod1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/04\/mod1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/04\/mod1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/59851","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=59851"}],"version-history":[{"count":6,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/59851\/revisions"}],"predecessor-version":[{"id":61446,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/59851\/revisions\/61446"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=59851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=59851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=59851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}