Elmer101 Discussion of the SW40+ CW Transceiver
The Small Wonder Labs SW40+
radio is a simple kit designed and distributed by Dave Benson. The Elmer101
project uses this kit as a learning tool so that you can discover how radio
receiving and transmitting circuits work. As you build the radio, and study
the Elmer101 material, we hope that you can extend your electronic knowledge.
Included with each kit is a 20-page construction
manual. Although it does describe circuit function in a general way, its
purpose is mostly to help you identify the parts, show how and where they
mount to the printed circuit board. Alignment of the finished radio and
troubleshooting ideas are also covered.
This Elmer101 material delves more deeply into circuit
function. Get a PDF schematic here, to accompany
the circuit descriptions (below). Mike Maiorana is the keeper of the Elmer101 faq.
The series of pages below describes circuit function,
shows some oscilloscope waveforms and also some PSPICE simulations of various
"blocks" of the SW40+ radio.
You can e-mail me any questions you have on
the material below to: firstname.lastname@example.org
Please include [ELMER101] in the subject line.
TEST & MEASUREMENT EQUIPMENT