[sdiy] quadrafuzz ICs

[Derek Holzer]

Hi Tom,

Thanks for the suggestions.

And what about if it were single-supply?

I'm actually more interested in the filter section here, and the 
possibility of converting it to a 3 or 4 band EQ with possibility for 
high self-resonance via feedback through the distortion sections (i.e. 
reversing signal order with distortion before filter, and filter 
resonance sent back through distortion). TL074? LM358? Bonus points for 
single-supply power, of course. Need not be hifi, the sound I'm going 
for with it is pretty gritty.

d.

Tom Wiltshire wrote:
> 
> On 10 Nov 2007, at 13:18, Derek Holzer wrote:
> 
>> Anyone know what ICs go in here for the op amps? Or would just about 
>> anything work?
>>
>> http://www.paia.com/ProdArticles/quadrafz-design.htm
> 
> I don't know for sure, but I've built a lot of fuzzes, and I'd say that 
> anything should work. The response is determined by the diodes much more 
> than the amp, so it shouldn't change the sound much - but I'm not one of 
> those who thinks that original JRC4558s are the best thing since sliced 
> bread.
> 
> Try the usual candidates - I used to use TL064's for battery units and 
> TL074's for the improved noise figure (Did I get that the right way 
> around?)
> If you want a real studio-grade unit, there are probably some more 
> expensive esoteric audiophile choices.
> 
> T.
> 
> 
> 

-- 
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
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