Here are a couple more articles from the engineering trade magazines.
High-performance HF transceiver design. This article describes some of the decisions that an engineer must make when designing a modern amateur radio transceiver. It also sheds some light on the test methods used to test today’s receivers.
Use a twist (and other popular wires) to reduce EMI/RFI. Alexander Graham Bell patented twisted pair wires in 1881. We still use them today because they work so well.