[sdiy] Ken Stone Tube VCA question

[cheater cheater]

Thanks a lot for the reply Neil!

OK.. now I know what C3 does. But I don't know what R7 does :)

I've read the preceding section, but they are talking about some sort
of voltage divider there - I can't see that in the schematic.
C3+R7 look like some form of feedback, but I don't know between what
things, and I don't know what this feedback accomplishes?

Cheers
D.

On Mon, Jan 12, 2009 at 11:47 AM, Neil Johnson
<neil.johnson97 at ntlworld.com> wrote:
> Hi,
>
> cheater cheater <cheater00 at gmail.com> wrote:
>> Hi guys,
>> I'm beginning my forays into the world of tubes.
>> I'm looking at the schematic in:
>> http://cgs.synth.net/tube/vca.html
>>
>> What does the C3/R7 portion of the circuit do?
>
> See here:
>
> http://en.wikipedia.org/wiki/Discrete_Bipolar_Transistor_Biasing
>
> In particular, the section "Voltage divider with AC bypass capacitor" about 3/4 of the way down.
>
> Neil
> --
> http://www.njohnson.co.uk
>
>