{"id":27296,"date":"2017-07-22T07:30:23","date_gmt":"2017-07-22T11:30:23","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=27296"},"modified":"2017-07-22T07:30:23","modified_gmt":"2017-07-22T11:30:23","slug":"schematic-for-the-pll-edutec-4-band-digital-radio-weltempfanger","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2017\/07\/schematic-for-the-pll-edutec-4-band-digital-radio-weltempfanger\/","title":{"rendered":"Schematic for the PLL EDUTEC 4-Band Digital Radio Weltempf\u00e4nger?"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Many thanks to SWLing Post<\/em> contributor, Cezar Vener, who writes with the following inquiry:<\/p>\n

I would like to ask you if you can help me with a schematic diagram for an EDUTEC 4-Band digital radio (PLL EDUTEC 4-Band Digital Radio Weltempf\u00e4nger). It is not broken, but I would like to modify it. Of course, I could spend some time and manually extract the schematic, but I would lose too much time.<\/p>\n

While I know that “EDUTEC” is a registred trade mark for technical (“non-food”) products that was sold by “Eduscho Handelsgesellschaft” in Bremen and also I found that it is now owned by Tchibo, well – I would like to kindly ask you for help in this matter? (course, if you can).<\/p>\n

It is an old product, probably made in the 90’s and until now, I didn’t find anything on the net about it. I opened it and I found that its core is TA8132AN, and the FM section is made around TA7358AP. The audio stage is built with C1212C, and there is one more integrated circuit there, TA8148S (no datasheet on the net, but I found that is a DC-DC converter for electric tuning – built-in stabilized supply output for biasing VHF tuner variable capacitor \/ sine wave oscillation).<\/p>\n

BTW, I found it also in SONY CFS-W504L \ud83d\ude42<\/p>\n

The PLL chip is soldered with the unmarked side, so I don’t know what type it is.<\/p>\n

[See photo at top of post.]<\/p>\n

Here is a photo of the rear back stand:<\/p><\/blockquote>\n

\"\"<\/a><\/p>\n

Unfortunately, there is no other model or name written on the radio.<\/p>\n

I see there “CENTRON LABORATORIES LTD”, that points to the company with the same name from Gujarat, India. Very interesting :))<\/p>\n

In the hope of an answer from you, please allow me to thank you and to congratulate you for the very nice site that you maintain there!<\/p><\/blockquote>\n

Many thanks, Cezar! It’s readers like you who make this site such a great one!<\/p>\n

Post<\/em> Readers:<\/strong> I hope someone may be able to help Cezar. This radio looks familiar–perhaps I’ve seen it badged with a different company name? \u00a0Please comment if you can help Cezar locate a schematic.<\/p>\n","protected":false},"excerpt":{"rendered":"

Many thanks to SWLing Post contributor, Cezar Vener, who writes with the following inquiry: I would like to ask you if you can help me with a schematic diagram for an EDUTEC 4-Band digital radio (PLL EDUTEC 4-Band Digital Radio Weltempf\u00e4nger). It is not broken, but I would like to modify it. Of course, I […]<\/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":[3,139,26,43],"tags":[6360,6361,6358,6363,2873,6362,34,6365,6364,6359],"class_list":["post-27296","post","type-post","status-publish","format-standard","hentry","category-news","category-radio-modifications","category-radios","category-shortwave-radio","tag-c1212c","tag-cezar-vener","tag-edutech","tag-pll-edutec-4-band-digital-radio-weltempfanger","tag-portables","tag-schematic","tag-shortwave","tag-sony-cfs-w504l","tag-ta7358ap","tag-ta8132an"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-76g","jetpack-related-posts":[{"id":50875,"url":"https:\/\/swling.com\/blog\/2021\/11\/radio-mods-unblocking-the-yaesu-frg-8800-frequency-coverage-limitations\/","url_meta":{"origin":27296,"position":0},"title":"Radio Mods: Unblocking the YAESU FRG-8800 Frequency Coverage Limitations","author":"Thomas","date":"November 15, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Paolo Viappiani (SWL I1-11437), who shares the following guest post. Note that, as with any radio modification, perform this operation at your own risk. This is a very simple mod, but if you feel it might be beyond your skill level, consider hiring a radio\u2026","rel":"","context":"In "Guest Posts"","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\/2021\/11\/figure-e-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/11\/figure-e-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/11\/figure-e-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/11\/figure-e-1.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":48281,"url":"https:\/\/swling.com\/blog\/2021\/03\/tecsun-pl-330-tip-using-the-telescopic-antenna-for-the-lw-mw-bands\/","url_meta":{"origin":27296,"position":1},"title":"Tecsun PL-330 tip: Using the telescopic antenna for the LW & MW bands","author":"Thomas","date":"March 27, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor, Mad Radio DXer, who writes: Hi, I want to let you & your readers know of a Tecsun PL-330 trick that I saw mentioned in the comments section of your blog some time ago which does not seem to have a lot of awareness.\u2026","rel":"","context":"In "Longwave"","block_context":{"text":"Longwave","link":"https:\/\/swling.com\/blog\/category\/longwave\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/01\/Tecsun-PL-330-11.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/01\/Tecsun-PL-330-11.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/01\/Tecsun-PL-330-11.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/01\/Tecsun-PL-330-11.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":49367,"url":"https:\/\/swling.com\/blog\/2021\/06\/mfj-will-begin-selling-eton-shortwave-receiver-products-effective-immediately\/","url_meta":{"origin":27296,"position":2},"title":"“MFJ will begin selling Eton Shortwave Receiver Products effective immediately”","author":"Thomas","date":"June 25, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributors, Eric McFadden and Mike Agner, who share the following announcement from MFJ: MFJ to sell\u00a0Eton\u00a0Shortwave Receivers! Elite 750 A 360-degree rotating AM antenna enhances the radio's ability to pull in weak AM signals. You can listen to AM, FM , SW, LW, SSB and\u2026","rel":"","context":"In "News"","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\/2021\/06\/Eton-Traveler.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/06\/Eton-Traveler.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/06\/Eton-Traveler.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/06\/Eton-Traveler.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/06\/Eton-Traveler.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":59859,"url":"https:\/\/swling.com\/blog\/2024\/05\/email-prompts-bill-to-pull-his-regenerative-receiver-off-the-shelf\/","url_meta":{"origin":27296,"position":3},"title":"Email prompts Bill to pull his regenerative receiver off the shelf!","author":"Thomas","date":"May 29, 2024","format":false,"excerpt":"Many thanks to\u00a0SWLing Post\u00a0contributor, Bill Meara who shares\u00a0the following article from the excellent SolderSmoke Podcast blog: 2014 \"Off the Shelf\" Regen Comes Off the Shelf (Two Videos) https:\/\/youtu.be\/Qj5DE2RJ7aY Walter KA4KXX spotted an error in the schematic of my 2014 \"Off the Shelf\" regen receiver: The source resistor on the MPF-102\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/img.youtube.com\/vi\/Qj5DE2RJ7aY\/0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":16250,"url":"https:\/\/swling.com\/blog\/2015\/12\/icom-ic-r72-a-repair-story\/","url_meta":{"origin":27296,"position":4},"title":"Icom IC-R72: a repair story","author":"Mehdi Asgari","date":"December 19, 2015","format":false,"excerpt":"In this post I'm going to tell you how I repaired my Icom IC-R72 receiver. Although it's about a specific device, the logic\u00a0and methodology applies to all radios. I bought an Icom R72 from a friend for about $200. At first, I just checked 7.0MHZ (40 meter band) and 21.0MHZ\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"Icom-IC-R72-Front-Mehdi-Asgari","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/12\/Icom-IC-R72-Front-Mehdi-Asgari-1024x539.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/12\/Icom-IC-R72-Front-Mehdi-Asgari-1024x539.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/12\/Icom-IC-R72-Front-Mehdi-Asgari-1024x539.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":29521,"url":"https:\/\/swling.com\/blog\/2017\/12\/pete-reports-new-developments-with-the-ubitx-transceiver\/","url_meta":{"origin":27296,"position":5},"title":"Pete reports new developments with the uBITX transceiver","author":"Thomas","date":"December 8, 2017","format":false,"excerpt":"Many thanks to SWLing Post contributor, Pete\u00a0Eaton (WB9FLW), who writes: Last March, Ashhar Farhan (VU2ESE) the designer of the very popular BITX20 and BITX40 series of mono-band HF Transceivers announced a new low cost rig called the uBITX (micro BITX) a full blown 80-10m 10 Watt SSB\/CW Transceiver. 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