Antwort: [sdiy] AN6912 IC in TR-808?

[trevor at resonance.fsnet.co.uk]

> > Did you also notice that R358 in the 808 is supposed to be 
> > 68k whereas it
> > is 18k in the 909 (R221). Maybe this is an error too?
> 
> I didn't remember that one, but I just had a look at my 909 service
> manual and the 18k for R221 has been tippexed out and replaced with 68k
> in my hand writing, so I must have noticed and checked it out inside a
> real 909.
> 
> Colin f

Ouch, this one caught me out! I noticed the difference between the two diagrams (actually, I think I used the Boss handclapper circuit, not the 808 IIRC) but because the circuit seemed fine to my ears, I presumed it was an intentional component change (not had a real 909 to look at, unfortunately). I shall substitute the resistor on my handclap circuit tonight. Judging by how my HC circuit sounds at the moment and looking at the 909 schematic, I'm guessing that this value isn't greatly critical. 

I'm really glad this thread started...

Cheers

Trevor.


Trev


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