Cgs synth

Marcel,

Did you get your Steiner VCF working in the end?
I think I have the exact same problem as you, though I didn't connect
the power the wrong way around to begin with.
It just keeps resonating...
Any tips?

Evan.




--- In cgs_synth@yahoogroups.com, "marcel01011" <marcel_binary@...>
wrote:

>
>
> hi, i've recently built the steiner vcf; but it hasn't been working
> properly. when i first tested it i connected the power backwards,

and

> now when i use it it constantly oscillates even with resonance

turned

> completely down. the sound is like a standard feedbacked signal,

loud,

> and high-pitched. when i turn the cutoff i can heare some filtering
> through the screaming feedback though.
> The tl071 is still fine, and i've checked+reflowed the solder

joints;

> my question is, any of you smart people know where the problem most
> likely would be/ where i should start troubleshooting?
> should i replace (test?) transistors, caps?
>
> any help is welcome
>
> cheers, marcel
>