157 - CONSTRUYENDO BOBINAS PARA 5 Y 7 MHz PARA LA ANTENA CHINA DE VARILLA EXTENSIBLE

Building a coil for the 7 MHz band (and, coincidentally, another for the 5 MHz band) for the Chinese telescopic rod antenna. 3D model for printing in ASA/ABS: https://www.thingiverse.com/thing:703... The Thingiverse model includes two coils: the 17-turn coil for the 5 MHz band and the 12-turn coil for the 7 MHz band. These coils allow the Chinese antenna to operate on all bands between 60 and 6 meters. You'll need two M10 bolts measuring 25mm/30mm long, like these: https://www.amazon.es/dp/B09NKWJZRN And a 30mm M10 coupling nut like this: https://www.amazon.es/dp/B0B3935CJ9 Of course, they're probably cheaper at a hardware store. Video Content ------------------------------ 00:00 - Presentation 00:45 - Channel Intro 01:02 - Designing a Coil 02:40 - 3D Design 05:09 - Assembling the Coil 08:50 - Winding 14:05 - Testing the First Design 15:48 - Design for Improvement... 16:43 - Adapting the Design for 7 MHz 18:19 - New Test at 7 MHz 20:06 - Conclusions #5MHz #7MHz #coil #antenna #china #hamradio #diyelectronics #hamradio #build-your-antennas The intro music is an excerpt from Slighshot by Steve Adams, in the public domain. The background music is Indeep (c)2002 by Wagner García and Leonardo Segura, recorded at Wagner Prat de Llobregat Studios. Provided for these videos by its author.