AM radio transmission technologies have changed greatly over the years. Transistors have replaced vacuum tubes; Heliax cable has replaced open transmission line. Relay control ladders have been ...

Fig. 1: A 1960s phasor with commonpoint controls added. Our previous article “Find Your Modulation Sweet Spot,” published in the Oct. 9, 2019, issue of Radio World, is still available online, just ...

Let's continue our discussion of the subsystems in the impedance meter that we've been discussing in the previous posts (see “Related Posts” at the end of page 3). We now move on to the next to last ...

A balanced Y-connected load of (300 + j100) Ω is supplied by a three-phase line 40 km long with an impedance of (0.6 + j0.7) Ω per km (line-to-neutral). Find the voltage at the receiving end when the ...