Radio and Electronics Cookbook

30

A simple short-wave receiver – Part 1

Introduction

No apologies for yet another design of short-wave radio. This is the beauty of our hobby – there is always something new to try. Not all circuits operate in the same way; not all circuits work equally well; sometimes a simple design suits the operator better than a complicated design. So here is another one for your consideration; it’s a good project for a novice, and a good one-evening project for someone more experienced.

A basic description

Figure 1 gives the block diagram of the receiver, which employs a regenerative detector, one of the earliest techniques by which excellent selectivity (the ability to separate two stations very close in frequency) could be combined with good sensitivity ...