[sdiy] Simple VCA?

[Tim Stinchcombe]

> Does it look like this ASCIImatic:

Yep, that is as per the circuit in the Teledyne book: JFET is n-channel, is
shown with no resistor on the gate, but has a '-' (minus) on it.

Tim

> 
> 
>                                 FB ?
> 
>                        +------\/\/\/\---+
>             510R       |                |
>                        |  |\            |
>     IN *--/\/\/\/---+--+--|-\           |
>                     |     |  \          |
>                     |     |   \         |   out
>                   |-+     |    >--------+----->
>                   |       |   /
> cont *-/\/\/\/--->|-+     |  /
>                     |  +--|+/
>           ???       |  |  |/ 
>                     +--+
>                     |
>                     |
>                     /
>                     \ 510R
>                     /
>                     \
>                     /
>                     |
>                     |
>                   GND
> 
>