[sdiy] frequency shifters...

[jhaible]

> thankyou all for your explanations and help. I think i have a basic
understanding of frequency shifting now.
>  Now I will try to accomplish something similiar to wht John Marshall had
explained in his post using ring modulators to achieve the frequency
shifting.
>  thankyou all.


Here's some further reading:
http://home.t-online.de/home/jhaible/hj_fs.html

JH.