{"id":21870,"date":"2016-10-24T08:25:32","date_gmt":"2016-10-24T12:25:32","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=21870"},"modified":"2016-10-24T08:25:32","modified_gmt":"2016-10-24T12:25:32","slug":"guest-post-more-anti-noise-ideas","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2016\/10\/guest-post-more-anti-noise-ideas\/","title":{"rendered":"Guest Post: More Anti-Noise Ideas"},"content":{"rendered":"<p><em>In a previous guest post, SWLing Post contributor TomL, shared his <a href=\"http:\/\/swling.com\/blog\/2016\/06\/guest-post-my-evolving-morphing-sw-listening-station\/\" target=\"_blank\">&#8220;Evolving, Morphing, SW Listening Station&#8221;<\/a>\u00a0where he detailed the many ways he&#8217;s trying to fight heavy radio interference at his listening post. The following post is TomL&#8217;s update:<\/em><\/p>\n<hr \/>\n<h2>More Anti-Noise Ideas<\/h2>\n<h3>(Continuing the hunt for better reception in a foul RFI environment)<\/h3>\n<p style=\"text-align: right;\"><strong>by TomL<\/strong><\/p>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/TomL-Radios.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-21874\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/TomL-Radios.jpg\" alt=\"toml-radios\" width=\"784\" height=\"452\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/TomL-Radios.jpg 784w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/TomL-Radios-300x173.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/TomL-Radios-768x443.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/TomL-Radios-624x360.jpg 624w\" sizes=\"auto, (max-width: 784px) 100vw, 784px\" \/><\/a><\/p>\n<p>I have made the following changes:<\/p>\n<ul>\n<li>Created a prototype mini-loop based on a crossed-parallel idea from VE1ZAC (Jeff).<\/li>\n<li>Added a balun from <a href=\"http:\/\/www.lnrprecision.com\/store\/#!\/EF-SWL-Shortwave\/p\/39885474\" target=\"_blank\">LNR Precision (Parfitt&#8217;s EF-SWL)<\/a> in an experimental configuration.<\/li>\n<li>Added to the balun, an outdoor amplifier &#8211; <a href=\"http:\/\/www.wellbrook.uk.com\/ALA100M-1\" target=\"_blank\">Wellbrook ALA-100M<\/a>.<\/li>\n<li>Added a noise canceling unit (<a href=\"http:\/\/www.mfjenterprises.com\/Product.php?productid=mfj-1026\" target=\"_blank\">MFJ-1026<\/a>).<\/li>\n<li>Added 2 preselectors, an old <a href=\"http:\/\/www.universal-radio.com\/used\/sold213.html\" target=\"_blank\">Grove TUN-3<\/a> connected to the main loop feed and an <a href=\"http:\/\/www.mfjenterprises.com\/Product.php?productid=MFJ-1046\" target=\"_blank\">MFJ-1046<\/a> connected to the ground connection of the balun. Both feeds go into the MFJ-1026.<\/li>\n<li>Added <a href=\"https:\/\/www.bhi-ltd.com\/noise-cancelling\/dsp-noise-cancelling-in-line-modules\/compact-in-line.html\" target=\"_blank\">BHI Compact In-Line DSP<\/a> filter and two switch boxes to cut it in\/out as needed.<\/li>\n<li>Added a medium wave noise canceling unit that I have not figured out how to use yet. (Quantum Phaser). The MFJ unit does not work on medium wave without modification.<\/li>\n<li>Purchased from eBay a used Grundig Satellit 800, a somewhat more robust fixed-station receiver to replace my aging Sony ICF-2010.<\/li>\n<li>Other non-related (not shown): Whistler digital scanner + UHF over-the-air TV + FM broadcasts + an AM\/FM HD digital radio + high pass filters from MiniCircuits.com \u2013 (audio from all these sources is passed to an existing high fidelity stereo power amp and NHT Super One speakers on the computer desk for near-field monitoring). Associated antennas are also hidden on the outside deck (shhhhh!).<\/li>\n<li>Large charge card balance!!<\/li>\n<\/ul>\n<p>So, here are some pics for the crossed-parallel loop. <a href=\"http:\/\/www.ve1zac.com\/\" target=\"_blank\">VE1ZAC web site<\/a> has all the references if you want to explore further or google him. Mine is purely a prototype and not finished. And should eventually be placed on a rotor (but how to keep my Nazi-like condo association from finding out?!?!?!?).<\/p>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-21875\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops.jpg\" alt=\"loops\" width=\"372\" height=\"534\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops.jpg 372w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-209x300.jpg 209w\" sizes=\"auto, (max-width: 372px) 100vw, 372px\" \/><\/a><\/p>\n<p>It is three 14 inch quilters hoops from Joann Stores plus some 1-inch copper strips cut from a small 2 meter roll of thin copper from eBay. Then, it is wired in parallel with silver-plated aviation wire on each side with a feed in the middle. Not an optimal placement of the feed, (should go straight down along the pipe). Will fix things up whenever I get some more time.<\/p>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-Closeup.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-21876\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-Closeup.jpg\" alt=\"loops-closeup\" width=\"367\" height=\"524\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-Closeup.jpg 367w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-Closeup-210x300.jpg 210w\" sizes=\"auto, (max-width: 367px) 100vw, 367px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-Closeup2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-21877\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-Closeup2.jpg\" alt=\"loops-closeup2\" width=\"552\" height=\"315\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-Closeup2.jpg 552w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/Loops-Closeup2-300x171.jpg 300w\" sizes=\"auto, (max-width: 552px) 100vw, 552px\" \/><\/a><br \/>\nSeems to be an efficient way to prototype small loops. It is now mounted on a short \u00be\u201d inside diameter PVC pipe into a cheap plastic sand-filled deck-umbrella stand. Loops are light and somewhat flimsy, so I mounted the three loops on a plastic triangle ruler and dowel sticks glued to the sides for some extra strength. Good enough for now.<\/p>\n<p>The EF-SWL balun is also in an experimental configuration. Since I read somewhere that loop antennas have a very low impedance at the feed point (like, 10 ohms or lower), I thought I might try a balun that is meant to lower the impedance and mount it <em>backwards<\/em>. I don&#8217;t have a picture of it but the SO-239 output is facing the loop and the screw terminals are facing the direction of the radio. My feeble brain thinks since it is a passive device of coils on ferrite, it should work bidirectionally for receive only applications like this. It seems to work but I have the excuse that I really don\u2019t know what I am doing! \ud83d\ude42<\/p>\n<div id=\"attachment_21878\" style=\"width: 587px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/BHI.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-21878\" class=\"wp-image-21878 size-full\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/BHI.jpg\" alt=\"bhi\" width=\"577\" height=\"286\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/BHI.jpg 577w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/BHI-300x149.jpg 300w\" sizes=\"auto, (max-width: 577px) 100vw, 577px\" \/><\/a><p id=\"caption-attachment-21878\" class=\"wp-caption-text\">BHI unit in action.<\/p><\/div>\n<p>The BHI DSP filter is useful in some circumstances but I find it fatiguing to listen to. The audio from the Sattelit 800 is so nice, I mostly like it without the DSP. The DSP narrows the bandwidth significantly, somewhere around 4 kHz or less from my hearing. I like that the Grundig has two tone controls. And it also has a stable SSB and on very strong signals with clear audio, I like to listen with SSB lower or upper sideband. But the DSP is useful at times for hash-like noisy signals; it is not quite as good on buzzing noise and I wish the Satellit 800 had a noise blanker, but that would have been a more costly purchase, like a Drake R8A.<\/p>\n<p>So, in a nutshell, I have a discovery about noise here: it is all around me and ubiquitous, like the air I breathe!<\/p>\n<p>I find it hard to null and also worry about peaking a station signal at the same time. However, I do have a lower noise floor with the experimental loop sitting outdoors, especially on medium wave (the Wellbrook amp + loop works great on the lower frequencies \u2013 am able to get <em>eight<\/em> different medium wave stations carrying Major League Baseball games at night \u2013 it would be nine to get WFAN for the New York Mets but the local Chicago Cubs station covers the adjacent frequency with horrible digital hash! ***Bleeping*** digital junk!).<\/p>\n<p>Also, the signal level is noticeably lower using the loop. Then, add in the effect of the MFJ Noise Canceling unit, the usable signal gets even weaker.<\/p>\n<p>The bottom line is, I can now finally enjoy listening to many SW broadcasts, BUT only the strongest signals. Anything else is still hopelessly lost in the noise. So, gains are limited.<\/p>\n<p>On the other hand, and something else I learned by doing is that, <em>any<\/em> 1 or 2 dB signal\/noise ratio improvement will help with the final audio output in the end product. Using low-noise amps, loops, noise canceler, preselectors, grounded connections, ground isolators at the input of every receiver, high quality stereo amplifier and speakers, tone controls, SSB vs. AM Sync, weird antenna configurations, etc, etc. It all helps in the end to some degree.<\/p>\n<p>Tinkering is an art that involves a lot of thinking\/doing iterations! And high quality parts must be used all along the chain or it could degrade the signal.<\/p>\n<p>Below are some audio samples, not very well recorded, but can give some idea of the incremental improvement with each enhancement (turn up the volume). NOTE: other people may get better or worse results depending upon individual situations, type of antennas used, etc, etc.<\/p>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest1-R.Marti_.mp3\" target=\"_blank\"><strong>Recording 1<\/strong><\/a>: R. Marti. First 10 seconds an indoor antenna with no noise reduction, second 10 seconds the outdoor loop without the MFJ-1026, the third 10 seconds with the MFJ-1026, then switched off and on to hear the difference.<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-21870-1\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest1-R.Marti_.mp3?_=1\" \/><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest1-R.Marti_.mp3\">http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest1-R.Marti_.mp3<\/a><\/audio>\n<p><strong><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest2-R.Marti-SSB.mp3\" target=\"_blank\">Recording 2<\/a>:<\/strong> R. Marti. MFJ -1026 is ON. Last 15 seconds is SSB, very thin sounding. Really only good for strongest signals. I liked the AM Sync better (Satellit 800 is really a Drake SW8 in disguise with a quality AM Sync). But, SSB can sound excellent with very clear voices with a steady and strong signal (The Satellit 800 does NOT have IF-shift or a BFO to fine tune an SSB reception, so the station must be exactly transmitting on the kHz mark, which most are nowadays).<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-21870-2\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest2-R.Marti-SSB.mp3?_=2\" \/><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest2-R.Marti-SSB.mp3\">http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest2-R.Marti-SSB.mp3<\/a><\/audio>\n<p><strong><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest3-R.Marti-BHI.mp3\" target=\"_blank\">Recording 3<\/a>:<\/strong> R. Marti. MFJ-1026 is ON. Last 20 seconds you hear me switch in the two audio switches and the BHI DSP is on its lowest setting. Narrower and clearer with some reduction of background noise. I find I only like going up to about 4 on the DSP dial, after that the audio fidelity starts getting more choppy with digital artifacts that sound like dripping water. I tend to like higher fidelity. One nice thing about the BHI DSP is a faux-stereo that helps a little with voice intelligibility by helping the brain naturally filter the noise. Faux-stereo is ON even when the noise reduction circuit is manually turned off (power must be on and bandwidth still sounds narrowed).<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-21870-3\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest3-R.Marti-BHI.mp3?_=3\" \/><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest3-R.Marti-BHI.mp3\">http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest3-R.Marti-BHI.mp3<\/a><\/audio>\n<p><strong><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest4-R.NacionalBrazilia.mp3\" target=\"_blank\">Recording 4<\/a>:<\/strong> R. Nacional Brazilia. First without MFJ-1026, then ON, then OFF, then ON, then with the BHI kicked for the last 20 seconds.<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-21870-4\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest4-R.NacionalBrazilia.mp3?_=4\" \/><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest4-R.NacionalBrazilia.mp3\">http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest4-R.NacionalBrazilia.mp3<\/a><\/audio>\n<p><strong><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest5-Greece.mp3\" target=\"_blank\">Recording 5<\/a>:<\/strong> Greece. Switching the MFJ-1026 on and off every 5 seconds. In this particular case, the signal was weak and fading a lot. The MFJ OFF was also weaker than with it turned ON. That is interesting behavior, usually it is opposite. It pays to play with the settings a little. At other times, and less frequently, the MFJ unit turned OFF sometimes sounds better than with it ON and tuned for less noise. Go figure!<\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-21870-5\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest5-Greece.mp3?_=5\" \/><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest5-Greece.mp3\">http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/10\/NoizeyTest5-Greece.mp3<\/a><\/audio>\n<p>After all the tweaking is done, and I cannot get any more performance out of this, I will probably have to move to a nice, quiet neighborhood and setup a nice antenna farm!!<\/p>\n<p>In the meantime, I do enjoy listening to the stronger stations from North America, Cuba, Brazil, Europe, and Australia with less noise than before.<\/p>\n<p>73&#8217;s<\/p>\n<p>TomL from NOIZEY Illinoiz<\/p>\n<hr \/>\n<p><em><strong>Once again, Tom, thanks for sharing your RFI elimination journey!<\/strong> <\/em><\/p>\n<p><em>I love how you take on this noisy problem\u00a0by experimenting and seeing it more as a challenge than an obstacle to enjoying your hobby. \u00a0Great job!\u00a0<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In a previous guest post, SWLing Post contributor TomL, shared his &#8220;Evolving, Morphing, SW Listening Station&#8221;\u00a0where he detailed the many ways he&#8217;s trying to fight heavy radio interference at his listening post. The following post is TomL&#8217;s update: More Anti-Noise Ideas (Continuing the hunt for better reception in a foul RFI environment) by TomL I [&hellip;]<\/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":[373,3607,3194,627,3,139,26,43,5],"tags":[4302,5120,5555,114,4342,2838,4172,4175,4303,5554,3755,4089,453,4082,5119],"class_list":["post-21870","post","type-post","status-publish","format-standard","hentry","category-am","category-antennas","category-guest-posts","category-how-to","category-news","category-radio-modifications","category-radios","category-shortwave-radio","category-swlers","tag-bhi-compact-in-line-noise-elimination-module","tag-bonito-gi300-galvanic-isolator","tag-grove-tun-3","tag-grundig-an200","tag-guest-posts","tag-how-to-eliminate-rfi","tag-low-profile-antennas","tag-low-profile-swl-antenna","tag-mfj-1026","tag-mfj-1046","tag-par-electronics-ef-swl","tag-qrm","tag-rfi","tag-shortwave-radio","tag-toml"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-5GK","jetpack-related-posts":[{"id":19251,"url":"https:\/\/swling.com\/blog\/2016\/06\/guest-post-my-evolving-morphing-sw-listening-station\/","url_meta":{"origin":21870,"position":0},"title":"Guest Post: My Evolving, Morphing, SW Listening Station","author":"Thomas","date":"June 5, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor, TomL, for the following guest post: My Evolving, Morphing, SW Listening Station by\u00a0TomL, May 26, 2016 My interest in radio listening has been rekindled after a long hiatus in parallel to my dwindling interest in Mainstream Media.\u00a0 It is now about 8 years without\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"Sony-2010","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/Sony-2010-1024x632.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/Sony-2010-1024x632.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/Sony-2010-1024x632.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":48313,"url":"https:\/\/swling.com\/blog\/2021\/03\/guest-post-indoor-noise-and-ferrites-part1\/","url_meta":{"origin":21870,"position":1},"title":"Guest Post: Indoor Noise and Ferrites, Part1","author":"Thomas","date":"March 30, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor, TomL, who shares the following guest post: Indoor Noise and Ferrites, Part 1 by TomL My magnet wire loop antenna on the porch reminded me to revisit aspects about my noisy Condo that I still needed to understand.\u00a0 Some RF noise I could control\u2026","rel":"","context":"In &quot;Articles&quot;","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/03\/TVSignal.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/03\/TVSignal.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/03\/TVSignal.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/03\/TVSignal.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33079,"url":"https:\/\/swling.com\/blog\/2018\/07\/guest-post-backpack-shack-3-0-part-3\/","url_meta":{"origin":21870,"position":2},"title":"Guest Post: Backpack Shack 3.0 \u2013 Part 3","author":"Thomas","date":"July 5, 2018","format":false,"excerpt":"Many thanks to\u00a0SWLing Post contributor,\u00a0TomL, who shares the following guest post as a his Backpack Shack 3\u00a0continues to evolve: Backpack Shack 3.0 \u2013 Part 3 by TomL I have now gone overboard since I think bigger must be better. \u00a0The temptation was just too great and now there is an\u2026","rel":"","context":"In &quot;Antennas&quot;","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\/2018\/07\/newbase.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/newbase.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/newbase.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/newbase.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":30672,"url":"https:\/\/swling.com\/blog\/2018\/02\/indoor-shortwave-antenna-options-to-pair-with-a-new-sdr\/","url_meta":{"origin":21870,"position":3},"title":"Indoor shortwave antenna options to pair with a new SDR","author":"Thomas","date":"February 9, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Chris Freitas, who writes: \"I am thinking of the new RSP1A SDR. Would you know of a good indoor antenna that would work well with it?\" Your antenna question is simple, but the answer is complex! First off, I think the RSP1A is a\u2026","rel":"","context":"In &quot;Antennas&quot;","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\/2017\/11\/RSP1A1-1024x708.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/11\/RSP1A1-1024x708.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/11\/RSP1A1-1024x708.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/11\/RSP1A1-1024x708.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":52420,"url":"https:\/\/swling.com\/blog\/2022\/04\/frans-experiments-with-the-mfj-1026-noise-canceler\/","url_meta":{"origin":21870,"position":4},"title":"Frans experiments with the MFJ-1026 Noise Canceling Signal Enhancer","author":"Thomas","date":"April 12, 2022","format":false,"excerpt":"Many thanks to SWLing Post contributor, Frans Goddijn, who writes: \"Last week I purchased the MFJ-1026 \u2018noise canceling signal enhancer\u2019 and I posted two blogs with video about it. Initially the device seemed as useless as it is good looking but then I found a configuration where the device is\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/swling.com\/blog\/category\/accessories\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/04\/MFJ-1026-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/04\/MFJ-1026-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/04\/MFJ-1026-1.jpeg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":15055,"url":"https:\/\/swling.com\/blog\/2015\/10\/guest-post-london-shortwaves-guide-to-mitigating-urban-radio-interference\/","url_meta":{"origin":21870,"position":5},"title":"Guest Post: London Shortwave&#8217;s guide to mitigating urban radio interference","author":"Thomas","date":"October 9, 2015","format":false,"excerpt":"Many thanks to SWLing Post\u00a0contributor, London Shortwave, who is kindly sharing this guest post--a brilliant article he recently posted on his own website. I'm very grateful: one of the most common questions I'm asked by readers is how to cope with the radio interference so many listeners and amateur radio\u2026","rel":"","context":"In &quot;Articles&quot;","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"London-Urban-City","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/London-Urban-City.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/London-Urban-City.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/London-Urban-City.jpg?resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/21870","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=21870"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/21870\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=21870"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=21870"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=21870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}