Sparklehorn Parts Swaps 1uf caps

[claytushaywood]

I only have about 10 1uf film caps left and I'm trying to cut down the 5 called for in the sparklehorn.  I suppose I'd like to use the 1uf's in the signal path.  But how about c8 and c9.  Would that make a difference?  Can I just put the ground connected to each of their 100k resistors that go to ground?  Maybe c7?

I know this is cheap but there's another lesson in here for electrolytic orientation which I still dont understand very well at some points.

[madbean]

Sure. Just as you said...keep the positive ends toward the voltage sources and neg. ends on those resistors.

[claytushaywood]

Thanks!  Now, my pt2399's are locking up again like on my last pt2399 project!  Should I try hardwiring pins 3 and 4 of the pt2399 together?

[flanagan0718]

I only have about 10 1uf film caps left and I'm trying to cut down the 5 called for in the sparklehorn.  I suppose I'd like to use the 1uf's in the signal path.  But how about c8 and c9.  Would that make a difference?  Can I just put the ground connected to each of their 100k resistors that go to ground?  Maybe c7?

I know this is cheap but there's another lesson in here for electrolytic orientation which I still dont understand very well at some points.

Film or Electros either way if you PM me I can send you a bunch...I got some spares.

[madbean]

Thanks!  Now, my pt2399's are locking up again like on my last pt2399 project!  Should I try hardwiring pins 3 and 4 of the pt2399 together?

Yes. It seems to be rather unpredictable, doesn't it? I think I will just tie these pins together on all future versions of PT2399 projects. It's weird, because the Rebote does not tie those pins but I do not recall hearing much of a problem with lockups. Just another peccadillo with this magnificent chip we have to use!