You might ask, "Why should I build a crude AM radio when I have a smartphone?"

Homer L. Davidson left the workbench in 2007, but his circuits still oscillate. Every time a hobbyist winds a coil around a pill bottle and hears that first crackle of cosmic noise, his legacy lives on. Roll up your sleeves, heat up that iron, and go build something that talks to the air.

: Reflecting the true spirit of the hobbyist, many projects encourage using parts salvaged from older electronics, making it an affordable entry into the craft. Key Projects You Can Explore

You cannot learn RF engineering from a simulator. Stray capacitance, skin effect, and Q factor are theoretical words until you physically move a coil tap one turn and hear a station appear. This book forces tactile learning.

: Construction of high-gain amplifiers, converters, preselectors, and custom chassis/cabinets. Builder's Insight

The biggest barrier to building vintage projects is obsolete parts. However, Davidson was pragmatic.

— At least 20–50 feet of insulated wire, as high and clear of buildings as possible. A good ground (cold water pipe or rod) is essential.