I wonder if you could substitute a single Hex Schmitt-Trigger IC (i.e
CD4069) to produce the clocks instead of 555's, as you can form 6
oscillators from a single chip.....with minimal external parts (1
capacitor + 1 pot per clock), you could easily build it on one of
those mini RS pcb boards. The formula for freq is in the datasheets.

Just a thought

ryan

--- In tr-707@yahoogroups.com , "gregory zifcak" <foleymachine@...> wrote:
>
> well, i don't think it matters what kind of caps you use for 555s and
> decay envelopes. i've had them work fine with polarized electrolytics
> and ceramics.
>
> as far as the clocks, mine dip down into the audio range at their
> lower end. you should be able to hear a faint whine if you touch their
> outputs to the 707 outputs. if you can hear output, they should work
> as clocks. accordingly, you can use these clock circuits as audio
> oscillators if you use a bigger cap. there is a free dos program
> called 555.exe which calculates the frequency of the oscillator when
> you type in the values of the cap and resistor.
>
> --- In tr-707@yahoogroups.com , "philo_707" <philo_707@> wrote:
> >
> >
> > Hmm, I'm def. a little confused about this one. I know the 555s I'm
> > using are right, I followed the schematic posted here except for
> > changing the resistor and cap values to the ones mentioned that work,
> > but no go yet. Would any .1 uf cap work
> >
> > For that matter, on the decay mod, will any 1.0-10 uF cap replacing
> > the stock ones work Do they need to be electrolytic or non, or does
> > it really matter
> >
> > About the LCD, I bought a dead parts unit that probably has a good LCD
> > on it, so even if I am successful in my attempts to revive the fried
> > one, I may have one nonetheless.
> >
> >
> >
> >
> > --- In tr-707@yahoogroups.com , "Bart Provoost" <bart@> wrote:
> > >
> > > >
> > > > To the guy who needed an LCD, I'm still doing repairs, but it
looks
> > > > like I will likely have a extra working LCD anyway, we'll see.
> > >
> > >
> > > That's interesting ;)
> > >
> > > Bart
> > >
> >
>