Re: audio oscillator (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 27 Jun 2007 18:48:30 +0800
From: Peter Terren <pterren@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: audio oscillator (fwd)

My first thought was what a trivial problem. Then I remembered when I had to 
make a similar thing.  To get a low distortion sine wave (which I presume 
you need) you can use a Wein Bridge oscillator.  Then there are questions of 
settling time when the frequency is changed and also range in one sweep. The 
first one I made 20 years ago used a bead thermistor as the non-linear 
device for the variable feedback. Usually done by other means now. Good 
luck.
Peter


----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, June 27, 2007 11:12 AM
Subject: audio oscillator (fwd)


> Anyone on the list happen to have a simple circuit for an audio
> oscillator.  I need approx freq range of 50 Hz thru 4 kHz.
>
> Please advise off-list.
>
> Dr. Resonance