#DIY 2022-10-20: изготовления компактной антенны City-Windom 40-20-10

Important note: it's better to select the number of turns for the shut-off choke using a soldered 200-ohm resistor instead of wire, based on the minimum SWR and optimal impedance of the shut-off choke. 17 turns, as shown in my video, is excessive; optimally, in my opinion, no more than 13-14 turns. I etched the board using a 3% solution of hydrogen peroxide, citric acid, and table salt in a ratio of one teaspoon of citric acid and one teaspoon of salt per 25 ml of hydrogen peroxide. Full list of etching recipes: https://radiokot.ru/lab/hardwork/62/