Active antenna for a shortwave radio (schematic with N-FET) скачать в хорошем качестве

Active antenna for a shortwave radio (schematic with N-FET)

It is very easy to make an active antenna for shortwave radio when you use a FET.. In my book "Retro Radio" (Dutch text) from approx 5-6 Years ago I already talked about this circuit. The active antenna is realized with a FET, the BF 245 b or BF 245 c. The BF 245 A is too sensitive for static charges on the input (quickly defective). Please note (important): when you make this circuit and use a long wire antenna outside, use a relay with a switch from gate to ground that opens when you want to use the active antenna. So that it closes the antenna to ground (earth) when the FET is not in use. Orherwise your FET will break down every 3 Months due to static charge on the long wire antenna. For short indoor antenna's this is not necessary. All the videos hat I have published on You Tube can be found via my Channel Trailer: Link is    • Radiofun232 on YouTube, find working & tes...   In thematic order you can find these video’s under the “comments” section. Important: to find all the links to the (+/-700) video’s on my YT Channel, select, in the comments section, “NEWEST FIRST” My books about electronics are available via the website from “Lulu”, search for author “Ko Tilman” there. https://www.lulu.com/shop/search.ep?k... There is an important video via which you can buy a document where I give links to many of my video’s, published between 2010 and 2018. Link is:    • Radiofun232: Links to my You Tube videos 2...   My books are also available via Barnes and Noble and via Amazon. Regarding all my video’s: I constantly keep them actual, so the original video’s with the most recent information are always on YouTube. That is the source, and search there. When my video’s are reproduced or re-edited on other websites/channels you can not (!) be sure about the original content (=really working electronics) and important adaptations to the circuits. Be aware of that, I saw on the internet my circuits reproduced in a poor or even not proper way. I can not help that, sorry. Upload 28 augustus 2016.