[sdiy] Vocal Filter

[patchell]

harry wrote:

> The major benefits for these sockets ate that they do not consume any PCB
> space (normally you must cross over the power traces beneath the IC)... and
> they are located in the perfect location for minimum inductance on a PTH through
> hole board.
>
> And are about five times the cost of a socket alone... don't work as well as SMT
> capacitors, or a multilayer board.  So in a way they are kind of obsolete now...
> (they never really caught on in the first place...)
>
> BTW: those who use the screw machine sockets that rely on precious metals for
> contact life are complaining they fall out of the sockets.  They should try AMP
> (Tyco) Diplomate sockets with the dual contact design, in tin-lead finish. The IC
> leads are tin lead anyway... and the sockets have excellent retention force and
> keep the contact clean by being gas tight (like wire wrap) because of contact
> pressure.
>
> I've never had one fall out (I build industrial controls....)
>
> They make a series with a retention leg that has a kink in it... snaps into the PCB
>
> holes and does not fall out when you turn the board over for solder. I use them for
>
> prototypes as well.
>
> My $.04   (my opinion twice...)
>

    Plus, what I like best about those sockets is:they don't cost very much!  I have
been using this type of socket for a long time...you just can't beat them.

    Although, on the vocal filter board I just assembled, I didn't have any sockets, so
I soldered the chips right into the board...really a bad idea on a prototype, but, in
this case, I lucked out.  Everything seems to be working.

>
> H^) harry
>
> Glen wrote:
>
> > At 04:36 PM 12/11/01 , Paul Maddox wrote:
> > >all,
> > >
> > >hehehe,
> > >wanna see INSANE decoupling???
> >
> > And Crow had written earlier:
> > >>   Contrast this board with the TKC board from a CS-80.  In their infinite
> > >> wisdom, Yamaha decided the board needed no decoupling at all.  Thus, the
> > >> 29-chip board (all 4000-series CMOS) has no decoupling caps:
> >
> > If I understand correctly, it is possible to buy chip sockets with caps
> > built-in. I don't suppose either PPG or Yamaha had ever used something like
> > this?
> >
> > Has anyone on the list used such sockets? It seems like a good idea for digital
> > logic chips. However, I could see how it might confuse a repairman working on a
> > circuit board using such sockets.
> >
> > Later,
> > Glen
>
> --
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--
 -Jim
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