[sdiy] Kraakdoos

[Pete]

Just wanted to let everyone know that you can get 2 free samples of
Pac Tec boxes by going here,

http://www.pactecenclosures.com/free_sample.lfml

Thats how I got mine. I used, NTE 123 and 2n2222 transistors as they
are the direct replacements for the BC547 and BC557 transistors. I had
a really hard time finding the 709. I found it by chance by going to a
electronics store in the south bay here in the bay area. I found the
14 pin ver. I just looked at the docs for it and it seems to work
though I don't have another type of 709 to compare to. Where did you
get the 709 from CJ? On a different note the other films that where
showing before the Moog film that I mentioned where filmed at Mills
College in Oakland Ca. Those are great! The Moog film is awesome too!
Bob Moog is a nice guy.

On 5/10/05, Metrophage <c0r3dump23 at yahoo.com> wrote:
> --- Rafael_Cohen at prusec.com wrote:
> 
> > I have had my eye on the Cracklebox schematic for a
> > month or two thinking to build it and I have a question about what
> > parts to get...
> 
> You're lucky, as there are not many parts! It took me about a year to
> get around to building this one,
> 
> > I poked around on Jameco and Mouser and it looks like there are many
> > different versions of the BC547 and BC557 transistors.  Which one do
> > y'all  use?  Why?
> 
> I don't use those. I am in the states, where the BC type transistors
> are less common. They seem like general purpose NPN and PNP
> transistors, so I just used the 2N3904 and 2N3906 which I had on hand.
> 
>  > Also 30+ hits for the 709 op amp.... Differences?  Preferences?
> 
> 30 types of 709? Now that's scary. Since we're exploiting it's bad, old
> school lack of frequency compensation, I decided older was better, and
> got UA709HM amps of the TO5 type. This was kind of arbitrary though, I
> have not tried any other types of 709. I'd find datasheets for
> whichever brands you are finding, and look up the letter suffixes, to
> see what characteristics are different. Still, this is just a
> single-amp chaotic oscillator - I doubt if there is going to be much
> difference. But who knows? I had to try several 709s before I found the
> particular one i was happy with, so I guess there are subtle
> variations.
> 
> > The only plan so far is to use some nice "dome nuts" (aka Acorn nuts)
> > I found as the contacts.
> 
> Neat. I have even heard of people using dinnerware as contacts, and
> playing the Kraakdoos by eating a meal! The brass knobs feel great, but
> for my next unit I will likely use metal banana jacks, so I can connect
> it to other conductive things.
> 
> > Since you guys were talking about the PackTec stuff, I took a look at
> > their website and it looks like the have some nice items... even some
> > designed with 9v batteries in mind.
> 
> Indeed, I just happened to find somebody selling two types of cases I
> needed on eBay at the same time. My patience finally paid off. I
> guessed this case to be for 9v battery, but it's for two AA. Since my
> 9v clips are bulky I had to grind out a couple pieces of plastic, but
> it was easily remedied.
> 
> Off to play!
> 
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-- 
listen to my latest tunes,

http://www.cubanpetemusic.com/p23%20Litmus.mp3

www.cubanpetemusic.com