[sdiy] Moog/Bode type frequency shifter design in EDN europe magazine

[Colin Hinz]

On Wed, 21 Jan 2004, Peter Blackett wrote:

> Hi,
> I just thought you might be interested to know that in the latest issue
> of EDN Europe , Jan 2004 ,
> there is an article in the design idea's section for a VCO that produces
> positive and negative output frequencies.the article mentions that this
> is traditionally done in analog music effect units such as they
> Bode/Moog frequency shifters.
> Article is written by Henry Walmsley from Farnborough .
> edn's web address is www.edn-europe.com
> but I don't know if they have the article on line .
> regards Peter

Yes, they do:

http://www.reed-electronics.com/ednmag/article/CA341451?stt=000&pubdate=12%2F25%2F2003&spacedesc=designideas

Or the PDF version:

http://www.reed-electronics.com/ednmag/contents/images/122503di.pdf

>From that link you may infer that *all* of the Design Ideas are
preserved online in PDF form, which is pretty much an exact clone of
the articles as printed in the magazine. The filename format is
"ddmmyy" (customary USA date format) followed by "di.pdf".

Back in the old days I'd pull all the DI articles from the printed
magazines, and bind them all together. It's much easier to archive
the PDF files!

- Colin Hinz
  Toronto, Canada