[CW] Good Sounding Sidetone or Code Practice Oscillator Kit

Stan Barr g0clv at dsl.pipex.com
Wed Aug 14 10:10:11 EDT 2013


On 08/14/2013 14:21, D.J.J. Ring, Jr. wrote:
> I have always found those 555 chip based code practice oscillators to be
> very harsh on the ears.
> 
> I like something that sounds link an on-air signal.
> 
> 73
> David J. Ring, Jr., N1EA <http://www.qsl.net/n1ea/> 

Heavy af lp filtering helps.
I had one 555 code oscillator that was about S7 on 80m.
Filtering and supply decoupling solved that.

-- 
Cheers and 73,
Stan Barr G0CLV GQRP-3369 FISTS-667  g0clv at dsl.pipex.com

"Never leave well enough alone." -  Raymond Loewy


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