[sdiy] Audio test generator and mesurement tool - can anyone suggest a good set?

[Neil Johnson]

> If you just want to build a tuneable oscillator you can easily make you own.

For measuring distortion you need a really good oscillator.  Here is a
fine example of a home-built distortion analyser:

http://www.users.on.net/~glenk/thd/thd.htm

which includes a low-distortion sine oscillator.

But if you just need a bench signal source and don't care too much
about quality (noise, distortion, stability, range, etc) then unless
you want to a build an oscillator for the fun of it you can pick one
up on eBay for much less than it would cost you to build (assuming you
want it in a case, with a power supply, terminals, range switches,
knobs, etc).

In the circuit that Robyn posted the output has a +3V offset, and the
frequency setting pot needs its wiper connecting to +6V.

Cheers,
Neil
--
http://www.njohnson.co.uk