A little history on what I have done:
Removed the 74HC240,
TiCK, (sidetone), Both NE-602's still thumping.
Only thing left is the switch, and the audio amp chain.
Lee Richey wrote:
>
> >
> > As Dave has stated , it appears that the
> > thumper is inherant with the 4066. I started re-thinking the
> > whole problem.
> >
>
> I don't have a 38s so I may be speaking out of turn here.
> That said, I doubt that the 4066 is the problem. I have used
> the 4066 in numerous low level applications for more years
> that I care to admit and find it to be an excellent switch. I'll
> bet the problem is elsewhere.
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