| fajna strona W3FF |
| coś dla konstruktorów, nadajnik z 1955 roku. https://www-rfcafe-com.translate.goog/references/popular-electronics/build-this-novice-cw-transmitter-feb-1955-popular-electronics.htm?_x_tr_sl=en&_x_tr_tl=pl&_x_tr_hl=pl&_x_tr_pto=sc 73' |