THD meter circuit needed

[René Schmitz]

Right, you need a good sine to feed it.

The old wien-bridge oscillator with an incandescent lamp as amplitude
stabilization can yield THD lower than 0.01%

Bye,
 René

At 20:02 05.08.00 -0400, Harry Bissell wrote:
>Hi Rene (et al)
>
>I'm missing something here... don't you still need a "perfect" sine-wave to
>drive
>the system... if not you measure the sine distortion too...
>
>Or maybe its ratiometric... how much WORSE is the circuit than the
>generator...?
>
>??? (puzzled)
>
>H^) harry

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