Hey!!! Thatīs a cool find, since practically just about everything in that book can be applied today. Sure, you have more modern components today, like LEDīs, ICīs, FETīs & MOSFETīs, PIN Diodes, Varactor Diodes, and transformer-less 8 Ohm Speakers, etc.. That said, little, if nothing has changed in antenna ideas in that. I could have used this book in high school, and even when I was in college. So, COOL!!!!!