Beyond theory, McWhorter includes mechanical maintenance tips that are often overlooked in purely electronic texts:
The book is designed for hobbyists with basic electronics knowledge who want to delve into the specific circuits used in shortwave receivers from the late 1930s through the early 1960s. It breaks down the radio into discrete stages, making complex tube technology accessible to modern restorers. The Vacuum Tube Shortwave Radio 2
Explaining how these functions were often combined into a single tube in later designs. The Vacuum Tube Shortwave Radio 2
Covering signal reception and audio recovery. The Vacuum Tube Shortwave Radio 2
Primarily available as a password-protected PDF download.