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BassBalls clone isn't working

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10/12/1999 2:34 AM

BassBalls clone isn't working

Hi everyone,

I've just finished making a clone of the EH BassBalls, and it has a problem.

The Envelope detection section isn't doing it's thing, and I'm not even getting any sound from the 'fuzz' switching option, which says to me that the opamp isn't working.

Thing is, I've tried 3 different ones now, the 1458 specified, plus two different TL072's, no difference. I've gone over the wiring a million times, nothing is out of place.

I did see on a previous post by Mark Hammer that he thought two resistors were swapped on the schem, so I tried it both ways, to no avail.

I'm at my wits end - can anyone help?

Rob

10/12/1999 1:39 PM
Gus	What brand? Aron what brand IC worked in the Dr. Q? that might be what Rob needs

10/12/1999 7:15 PM
Aron	No.... Mine never worked correctly either.... It sounded terrible. I bought the national? brand. But then went out and bought the ones that Radio Shack has. But I never put it in..

10/13/1999 12:15 AM
anonymous	I'm not sure what brand I got, I'll check when I get home. I know they say LM1458, other that that, I'll have to get back to you. The wierd thing is, I ran it through a circuit simulator, and it seemed to work fine, actually a 741 worked better than a TL072, for some reason. I'll get back to you on the brand of chip, I might try some others, too. Rob

10/13/1999 6:05 PM
Rob W.	Try searching NTE's cross reference database for alternatives. You can get NTE stuff through most electronic parts houses. (Mouser, etc.) http://www.nteinc.com/cgi-bin/nte Good Luck Rob W.

10/14/1999 2:03 AM
Rob P	Thanks Rob, I'll do that. The brand of the 1458 I got is national semi. I don't know if that's any help to anyone. Thanks again, Rob

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