Wein Bridge?

[Paul K. Dean]

The harmonic distortion meters use a Wein bridge oscillator, the IM-5258
and the older IM-58.

73,
Paul, wb9hgz

At 08:51 PM 6/8/03 -0700, Jack Crenshaw wrote:
>I just have a question out of curiosity.  I recall, back in the 50's,
>hearing a lot about the Wein bridge oscillator.  Supposedly, it was the
>best way to build an audio oscillator -- gave a naturally low
>distortion. I recall that it used a light bulb in the bridge circuit, as
>a temperature-dependent resistance to control amplitude.
>
>It seems to me that one of the Heathkit oscillators used the Wein
>bridge. I vaguely remember reading articles about it, and seeing the
>schematic in various magazines.  However, none of the oscillators I've
>seen, including the excellent AG-9A and AG-10, seem to use it.  As I
>recall, the AG-9A uses a split-T oscillator.
>
>Anyone here recall more about which model used the circuit?
>
>Jack
>
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