[sdiy] Mysterious transistor on one of the ASM-1 VCO versions

[Aaron Lanterman]

On May 2, 2008, at 6:19 AM, Pete Swarbrick wrote:

> What I forgot to say in the previous post is that I assume it has been
> drawn like this to clarify that the emitter, which in the 311 is
> connected to Pin 1 and labelled GND, needs to be connected to -15V in
> this circuit. I seem to remember hooking up a vectorboard ASM VCO and
> blindly tying pin 1 to 0V as I had always done when using a 311 and  
> then
> troubleshooting referring to the 311 datasheet. ( as Mike says- RTFD)

We did catch the pin 1 to -15 trick (I remembered that from the  
Chamberlin book).

I'll let folks know what happens once we remove the extra NPN.

- Aaron