[sdiy] CPO (code practice oscillator)?

[Scott E.]

Perhaps one of these would work:

http://www.arrl.org/news/features/2003/10/30/1/?nc=1
http://www.geocities.com/SiliconValley/2775/simplmcw.html
http://www.geocities.com/SiliconValley/2775/mcwosc1.html

Good luck, I hope you find what you are looking for.

Scott
===================================================
Andalong Dudigual wrote:
> Hello everybody,
> does anyone on here happen to have a schematic of a
> transistor (non IC) code practice oscillator? the only
> CPO schematics I've been able to find are versions
> that use a 555 timer or other ICs.
> The reason I ask is that, in recent curiosity over
> Steims "crackle box", I came across an article in a
> very old electronics magazine, which basicly says to
> take an old CPO and replace the capacitor with 2
> aluminum foil "touch plates". and Viola thats it.
> simple as dirt. except the magazine doesnt give a
> schematic for the cpo.
> so anybody got one or care to shed some light on this?
> thanks
>