{"id":358,"date":"2009-10-25T13:31:08","date_gmt":"2009-10-25T13:31:08","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=358"},"modified":"2009-12-16T15:51:24","modified_gmt":"2009-12-16T15:51:24","slug":"modify-your-icom-ic-735-to-work-drm","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2009\/10\/modify-your-icom-ic-735-to-work-drm\/","title":{"rendered":"Modify An Icom IC-735 To Work DRM"},"content":{"rendered":"
\"The<\/a>

The original IC-735 brochure. Click to enlarge.<\/p><\/div>\n

Are you a ham radio operator and\/or SWLer that would like to dabble in DRM (Digital Radio Mondial<\/a>) but don’t have a purpose-built \u00a0receiver? A friend recently brought to my attention a clearly-outlined DIY photo instructional for a modification you can make to the classic Icom IC-735 ham transceiver to add a 12 Hz downconverter and I.F. output jack.<\/p>\n

If you’re handy with a soldering iron, view the PDF instructional<\/a> created by Matthias Bopp (DD1US) for making this modification. The downconverter (along with many other DRM items) is sold by German firm, SAT-Schneider–follow this link<\/a> to purchase it online for just 25 Euros.<\/p>\n

\"logo_drm\"Though the IC-735 is primarily a ham radio transceiver, it has general coverage and makes for an exceptional shortwave broadcast receiver as well.\u00a0 In fact, I have an IC-735 in my shack and use it primarily for SWLing. This unit was produced by Icom in the 1980’s; many are available now in the used market for around $325-450US. A great value for the money, especially if you also happen to be a ham.<\/p>\n","protected":false},"excerpt":{"rendered":"

Are you a ham radio operator and\/or SWLer that would like to dabble in DRM (Digital Radio Mondial) but don’t have a purpose-built \u00a0receiver? A friend recently brought to my attention a clearly-outlined DIY photo instructional for a modification you can make to the classic Icom IC-735 ham transceiver to add a 12 Hz downconverter […]<\/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":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[54,139,26],"tags":[150,4083,147,151,149,148],"class_list":["post-358","post","type-post","status-publish","format-standard","hentry","category-drm","category-radio-modifications","category-radios","tag-dd1us","tag-drm","tag-icom-ic-735","tag-matthias-bopp","tag-mods","tag-receiver-modifications"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-5M","jetpack-related-posts":[{"id":35580,"url":"https:\/\/swling.com\/blog\/2019\/01\/dave-notes-the-icom-ic-735-makes-an-appearance-in-pole-to-pole-with-michael-palin\/","url_meta":{"origin":358,"position":0},"title":"Dave notes the Icom IC-735 makes an appearance in “Pole To Pole With Michael Palin”","author":"Thomas","date":"January 16, 2019","format":false,"excerpt":"Many thanks to SWLing Post contributor, Dave Zantow (N9EWO), who writes: Now you just just had to talk about the Icom IC-735. In the final episode from the 1992 BBC 8 part series \u201cPole To Pole with Michael Palin\u201d (Bitter End), you will see a couple of IC-735\u2019s used. They\u2026","rel":"","context":"In "Ham Radio"","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\/2019\/01\/Icom-IC-735-Pole-To-Pole.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/01\/Icom-IC-735-Pole-To-Pole.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/01\/Icom-IC-735-Pole-To-Pole.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":43405,"url":"https:\/\/swling.com\/blog\/2020\/05\/radios-that-may-not-be-benchmark-but-are-pure-fun\/","url_meta":{"origin":358,"position":1},"title":"Radios that may not be benchmark, but are pure fun–!","author":"Thomas","date":"May 22, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, John R Palmer, who replied to our previous post about radio regrets with a question. John asks: Name a piece of radio gear that for some reason, technical, emotional, design etc. that you\u2019ve gotten more fun using than you would ever have expected based\u2026","rel":"","context":"In "Ham Radio"","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\/2020\/05\/Radio-Shack-DX-351.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/Radio-Shack-DX-351.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/Radio-Shack-DX-351.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/Radio-Shack-DX-351.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":9815,"url":"https:\/\/swling.com\/blog\/2014\/06\/the-best-general-coverage-transceivers-for-shortwave-listening\/","url_meta":{"origin":358,"position":2},"title":"The best general coverage transceivers for shortwave listening","author":"Thomas","date":"June 2, 2014","format":false,"excerpt":"This article originally appeared in the May 2014 issue of\u00a0The Spectrum Monitor Magazine. Like many amateur radio operators, I became interested in HF radio because of my real passion for shortwave radio listening. During my first fifteen years as an SWL, I relied on portable receivers, in my case, the\u2026","rel":"","context":"In "Emergency Preparedness"","block_context":{"text":"Emergency Preparedness","link":"https:\/\/swling.com\/blog\/category\/emergency-preparedness\/"},"img":{"alt_text":"Icom-IC7200","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/06\/Icom-IC7200.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/06\/Icom-IC7200.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/06\/Icom-IC7200.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":8445,"url":"https:\/\/swling.com\/blog\/2014\/01\/listening-rewind-radio-australia-rings-in-the-millennium\/","url_meta":{"origin":358,"position":3},"title":"Listening Rewind: Radio Australia rings in the millennium","author":"Thomas","date":"January 1, 2014","format":false,"excerpt":"Yesterday\u2013New Year's Eve, 2014\u2013I spent some time listening to a few broadcasters as the new year passed through their time zones. While I missed hearing Radio New Zealand International (the first to welcome the New Year on the air), I did manage to catch Radio Australia, and the New Year\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"img":{"alt_text":"Source: Wikimedia Commons","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/01\/800px-OperaSydney-Fuegos2006-342289398.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/01\/800px-OperaSydney-Fuegos2006-342289398.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/01\/800px-OperaSydney-Fuegos2006-342289398.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/01\/800px-OperaSydney-Fuegos2006-342289398.jpg?resize=700%2C400 2x"},"classes":[]},{"id":7488,"url":"https:\/\/swling.com\/blog\/2013\/10\/franks-maritime-radio-suggestions\/","url_meta":{"origin":358,"position":4},"title":"Frank’s maritime radio suggestions","author":"Thomas","date":"October 4, 2013","format":false,"excerpt":"In response to my previous post, The Best Shortwave Receiver for Your Boat or Yacht, Frank (VK3JFH\/VP8DNM)\u00a0writes: \"I have all three of the portables mentioned, the Sony SW7600GR, the Sangean 909X, and the Tecsun PL-660. The latter is currently my portable of choice. Having just read this post re radios\u2026","rel":"","context":"In "Articles"","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"(Click to enlarge)","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2013\/10\/FrankHoldern-tecsun1-300x168.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":20167,"url":"https:\/\/swling.com\/blog\/2016\/07\/photos-from-an-ep2c-field-event\/","url_meta":{"origin":358,"position":5},"title":"Photos from an EP2C field event","author":"Thomas","date":"July 28, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor, Mehdi Asgari, who writes with news from his amateur radio club (EP2C): We had a one-day [amateur radio] program on July 16, 2016. Our club organized an activity from 5:00 AM local time to 8:30 PM (local time) in Karaj's heights (50 km of\u2026","rel":"","context":"In "Articles"","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"EP2C-photo_2016-07-17_18-28-59","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/07\/EP2C-photo_2016-07-17_18-28-59-1024x576.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/07\/EP2C-photo_2016-07-17_18-28-59-1024x576.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/07\/EP2C-photo_2016-07-17_18-28-59-1024x576.jpg?resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/358","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=358"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/358\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}