[CW] binaural I-Q demodulator

[David J. Ring, Jr.]

Does anyone have a PDF file of the article written by Rick Campbell, KK7B, 
about a binaural I-Q demodulator which is in
the ARRL Handbook as a weekend project (Chapter 17).

An I-Q demodulator produces two signals, I and Q, that always differ in 
phase by 90°. When you apply those two signals separately to your two ears, 
a spatial-separation effect is produced. The ear-brain combination detects 
the phase (time) delay and signals appear to come from different points in 
space. That is useful because it helps one discern multiple signals more 
clearly.

I know that ARRL is selling the new handbook with a companion CD, and if 
someone could print (by using PDF) the pages of the article.  I have the 
original QST article, but the construction details are not complete.

73

David Ring
N1EA