{"id":12727,"date":"2015-03-21T09:23:55","date_gmt":"2015-03-21T13:23:55","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=12727"},"modified":"2015-03-21T20:06:54","modified_gmt":"2015-03-22T00:06:54","slug":"crystal-radio-credit-card-receiver","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2015\/03\/crystal-radio-credit-card-receiver\/","title":{"rendered":"Crystal radio credit card receiver"},"content":{"rendered":"<p><a href=\"http:\/\/rover.ebay.com\/rover\/1\/711-53200-19255-0\/1?icep_ff3=10&amp;pub=5574879351&amp;toolid=10001&amp;campid=5337666156&amp;customid=&amp;icep_uq=Crystal+radio+credit+card+receiver&amp;icep_sellerId=tgs1950&amp;icep_ex_kw=&amp;icep_sortBy=12&amp;icep_catId=&amp;icep_minPrice=&amp;icep_maxPrice=&amp;ipn=psmain&amp;icep_vectorid=229466&amp;kwid=902099&amp;mtid=824&amp;kw=lg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-12728 size-large\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/03\/CrystalReceiver-1024x805.jpg\" alt=\"CrystalReceiver\" width=\"640\" height=\"503\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/03\/CrystalReceiver-1024x805.jpg 1024w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/03\/CrystalReceiver-300x236.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/03\/CrystalReceiver.jpg 1600w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<p>On a tip from my good friend Dave Cripe (NM0S), I just purchased <a href=\"http:\/\/rover.ebay.com\/rover\/1\/711-53200-19255-0\/1?icep_ff3=10&amp;pub=5574879351&amp;toolid=10001&amp;campid=5337666156&amp;customid=&amp;icep_uq=Crystal+radio+credit+card+receiver&amp;icep_sellerId=tgs1950&amp;icep_ex_kw=&amp;icep_sortBy=12&amp;icep_catId=&amp;icep_minPrice=&amp;icep_maxPrice=&amp;ipn=psmain&amp;icep_vectorid=229466&amp;kwid=902099&amp;mtid=824&amp;kw=lg\" target=\"_blank\">this cute crystal receiver kit from a UK-based seller on eBay<\/a>.<\/p>\n<p>The price is 8 GPB plus 3.50 GPB for shipping. After PayPal currency conversion, I paid $17.63 US shipped from the UK&#8211;a <em>very<\/em> fair price. The kit is supplied with 5 meters of antenna wire, a high impedence\u00a0earphone fitted with crocodile clips, and two double crocodile clip leads. Each unit is also tested prior to shipping. The seller also has a 100% positive rating on eBay.<\/p>\n<p>I&#8217;ll certainly make a post about the radio once I receive and build it. While there aren&#8217;t as many blowtorch broadcast stations to hear these days via a crystal set, with an ample length of antenna wire, you may be surprised what you will hear. Certainly a fun and lightweight item to take camping or place in your bug out bag. No batteries required!<\/p>\n<p><strong>Update:<\/strong> Since making this post, it appears the item number has changed since the seller had to list a new lot of kits. \u00a0Below, I&#8217;ve made two links that search eBay based on the description, not item number:<\/p>\n<ul>\n<li><a href=\"http:\/\/rover.ebay.com\/rover\/1\/711-53200-19255-0\/1?icep_ff3=10&amp;pub=5574879351&amp;toolid=10001&amp;campid=5337666156&amp;customid=&amp;icep_uq=Crystal+radio+credit+card+receiver&amp;icep_sellerId=tgs1950&amp;icep_ex_kw=&amp;icep_sortBy=12&amp;icep_catId=&amp;icep_minPrice=&amp;icep_maxPrice=&amp;ipn=psmain&amp;icep_vectorid=229466&amp;kwid=902099&amp;mtid=824&amp;kw=lg\" target=\"_blank\">Search via eBay US<\/a> (best if you&#8217;re in the USA, but scroll to bottom of screen to see this item under &#8220;International Sellers&#8221;)<\/li>\n<li><a href=\"http:\/\/rover.ebay.com\/rover\/1\/710-53481-19255-0\/1?icep_ff3=10&amp;pub=5574879351&amp;toolid=10001&amp;campid=5337666156&amp;customid=&amp;icep_uq=Crystal+radio+credit+card+receiver&amp;icep_sellerId=tgs1950&amp;icep_ex_kw=&amp;icep_sortBy=12&amp;icep_catId=&amp;icep_minPrice=&amp;icep_maxPrice=&amp;ipn=psmain&amp;icep_vectorid=229508&amp;kwid=902099&amp;mtid=824&amp;kw=lg\" target=\"_blank\">Search via eBay UK<\/a> (best if in UK or EU)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>On a tip from my good friend Dave Cripe (NM0S), I just purchased this cute crystal receiver kit from a UK-based seller on eBay. The price is 8 GPB plus 3.50 GPB for shipping. After PayPal currency conversion, I paid $17.63 US shipped from the UK&#8211;a very fair price. The kit is supplied with 5 [&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":[373,344,433,3],"tags":[617,3721,3723,4095,3722],"class_list":["post-12727","post","type-post","status-publish","format-standard","hentry","category-am","category-kits","category-mediumwave","category-news","tag-crystal-radio","tag-crystal-radio-credit-card-receiver","tag-crystal-radio-kit","tag-kits","tag-radio-kits"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-3jh","jetpack-related-posts":[{"id":12976,"url":"https:\/\/swling.com\/blog\/2015\/04\/tinkering-with-the-credit-card-crystal-radio\/","url_meta":{"origin":12727,"position":0},"title":"Tinkering with the Credit Card Crystal Radio","author":"Thomas","date":"April 14, 2015","format":false,"excerpt":"A few weeks ago, we published a short post about a credit card crystal radio\u00a0from an eBay seller in the UK. I purchased a\u00a0kit--at $17-18 US shipped, it's quite a modest investment for what might be a fun little project. The crystal radio arrived while I was traveling during Easter\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"Credit-Card-Crystal-Radio-2","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/04\/Credit-Card-Crystal-Radio-2.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/04\/Credit-Card-Crystal-Radio-2.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/04\/Credit-Card-Crystal-Radio-2.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":15746,"url":"https:\/\/swling.com\/blog\/2015\/11\/vance-explores-credit-card-and-earpiece-radios\/","url_meta":{"origin":12727,"position":1},"title":"Vance explores credit card and earpiece radios","author":"Thomas","date":"November 23, 2015","format":false,"excerpt":"Many thanks to SWLing Post reader, Vance, who writes: You got me hooked on those little credit card sized radio kits from an eBay seller so much that I have bought a few more of his kits. I've found them to be so much fun, that I have started looking\u2026","rel":"","context":"In &quot;FM&quot;","block_context":{"text":"FM","link":"https:\/\/swling.com\/blog\/category\/fm\/"},"img":{"alt_text":"Credit-Card-Crystal-Radio-4","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/04\/Credit-Card-Crystal-Radio-4.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/04\/Credit-Card-Crystal-Radio-4.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/04\/Credit-Card-Crystal-Radio-4.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":43684,"url":"https:\/\/swling.com\/blog\/2020\/06\/credit-card-crystal-radio\/","url_meta":{"origin":12727,"position":2},"title":"Credit Card Crystal Radio","author":"Thomas","date":"June 3, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Paul Evans, who shares this article from Hackaday that highlights a crystal radio built completely on a smart chip credit card by Billy Cheung. Hackaday notes: This is possible because the smart chip on many credit cards contains a diode. It\u2019s then a simple\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\/2020\/06\/crystal-radio-credit-card-e1591183584962.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/06\/crystal-radio-credit-card-e1591183584962.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/06\/crystal-radio-credit-card-e1591183584962.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/06\/crystal-radio-credit-card-e1591183584962.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":14149,"url":"https:\/\/swling.com\/blog\/2015\/07\/neils-updated-radio-kit-guide\/","url_meta":{"origin":12727,"position":3},"title":"Neil&#8217;s updated radio kit guide","author":"Thomas","date":"July 23, 2015","format":false,"excerpt":"Neil Goldstein, W2NDG, has just informed me that he's updated his comprehensive radio kit guide which can be found at\u00a0RadioKitGuide.com. Many thanks, Neil! The next kit I have on the\u00a0table is the Sawdust Regenerative Receiver by BreadBoard Radio. Should be a lot of fun and a nice weekend project (once\u2026","rel":"","context":"In &quot;Kits&quot;","block_context":{"text":"Kits","link":"https:\/\/swling.com\/blog\/category\/kits\/"},"img":{"alt_text":"My Ozark Patrol regenerative receiver kit","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/OzarkPatrol.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/OzarkPatrol.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/OzarkPatrol.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":15088,"url":"https:\/\/swling.com\/blog\/2015\/10\/new-from-heathkit-the-explorer-jr-trf-am-radio-receiver-kit\/","url_meta":{"origin":12727,"position":4},"title":"New from Heathkit: the Explorer Jr TRF AM radio receiver kit","author":"Thomas","date":"October 8, 2015","format":false,"excerpt":"Yes, the legendary\u00a0Heathkit company is back\u00a0and their first kit is a simple\u00a0Tuned Radio Frequency (TRF) AM\/mediumwave analog receiver: the Explorer Jr. I knew\u00a0Heathkit was back in business and under new management, but hadn't heard any updates as of late. Their president, Andy, just sent a message to the \"Heathkit Insiders\"\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"HeathkitExplorerJr","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/HeathkitExplorerJr.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":14752,"url":"https:\/\/swling.com\/blog\/2015\/09\/video-stephens-poldhu-radio-kit\/","url_meta":{"origin":12727,"position":5},"title":"Video: Stephen&#8217;s Poldhu Radio Kit","author":"Thomas","date":"September 13, 2015","format":false,"excerpt":"Many thanks to SWLing Post contributor, Stephen Cooper, who recently shared a video on the SWLing chatroom: https:\/\/youtu.be\/9nRPyZ7h_qI I'm a sucker for cute radio kits, so I purchased one of these from the UK-based seller on eBay as well. There are two kit packages: one with the receiver only, another\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"Radio-Kit","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/09\/Radio-Kit.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/09\/Radio-Kit.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/09\/Radio-Kit.jpg?resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/12727","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=12727"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/12727\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=12727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=12727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=12727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}