[sdiy] ASM-1 VCO LM311 Question

[Jaco Sloof NewbieSynthBuilder]

Hmm, i'm using a 2n3819 as FET, is this a good thing?

pinout from TOP flat side right is:

D
G
S

Gene? Magnus? is this a good FET or should i replace with other?

(its still N-channel)
--- David Reichert <sysyphus at sympatico.ca> wrote:
> While we're on the topic of the ASM-1 VCO, I'm having trouble with
> the
> 2N4856. I don't seem to be connecting it correctly. I can't find a
> data
> sheet anywhere and have to idea which pin is which. I could figure
> it
> out if it was a BJT, but for an FET I don't know how to go about
> it.
> 
> Can anyone help with this?
> 
> Thanks,
> Dave
> 
> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of harry
> Sent: February 2, 2002 3:52 PM
> To: patchell
> Cc: Jaco Sloof NewbieSynthBuilder; SynthDIYmailinglist
> Subject: Re: [sdiy] ASM-1 VCO LM311 Question
> 
> Hmmm ?  5 and 6 go to +15 ?
> 
> I usually tie 5 to 6 only.  I've never used 5 and 6 and the data
> sheet
> says
> 
> to tie them together if they are not used. I'LL have to check the
> data sheet.
> 
> H^) harry
> 
> patchell wrote:
> 
> >     If I remember correctly, on the LM311, Pin 1,4 need to go to
> -15,
> > and 5,6,8 need to go to +15.  Pin 1, I seem to remember, is the
> emitter
> > of the output transistor.  In order to turn the discharge FET
> off, the
> > output needs to go to a large negative voltage.
> >
> > Jaco Sloof NewbieSynthBuilder wrote:
> >
> > > Maybe obvious but i'll check N-E-way:
> > >
> > > Pin 1 of the LM311 goes to ground on the datasheet
> > >
> > > do i have to tie pin 1 to ground as well, in the ASM-1 VCO?
> > >
> > > Also, i detected an (non significant) error in the VCO schem
> pdf
> > >
> > > from pin 7 of the LM311, a resistor goes to ground, 3k3
> > >
> > > R18 to be precise, but this already exists:
> > >
> > > R18 from LM311 pin 2, to CA3140 pin 6...
> > >
> > > is this error of ehhh "hazard" to the VCO's workings?
> > >
> > > much thanx in advance, and greetings CJ Wacko Jacko
> > >   _______
> > >  /       \
> > > /  @   @  \     __________
> > > |    Q    |    /HI, I'M   \
> > > | _______ | __/  REALLY    \
> > > | \|_|_|/ | \_  A 9-line   |
> > > \  \_|_/  /   \  SMILEY!   |
> > >  \_______/     \ COOL HUH! /
> > >                 \_________/
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Great stuff seeking new owners in Yahoo! Auctions!
> > > http://auctions.yahoo.com
> >
> > --
> >  -Jim
> > ------------------------------------------------
> > * Visit:http://www.silcom.com/~patchell/
> > *-----------------------------------------------
> > *I'm sure glad Merry Christmas comes just once a year
> > * -Yogi Yorgensen
> > ------------------------------------------------
> 
> --
> Jihad Terrorism Conspiracy New World Order
> Revolution Black Helicopters Freedom of
> Speech First Amendment Rights: Carnivore Bait
> go ahead and READ my e-mail I have nothing to
> hide... how about YOU ???
> 
> 
> 


__________________________________________________
Do You Yahoo!?
Great stuff seeking new owners in Yahoo! Auctions! 
http://auctions.yahoo.com