LPB-1 Q

kvb · March 23, 2006, 01:47:16 PM

The LPB 1 (EH) parts list calls for .15uf electrolytic caps (or equivalent).

I know tantalum is electrolytic.

And, yes I understand that different cap values just change tone some.

But, is any capacitor ok?

I'm actually ready to just use a .1uf alum elec in parallel with a polyester .05uf to get .15uf.

thoughts?
thanks

skiraly017 · March 23, 2006, 01:51:02 PM

Which layout are you using? I've only seen a LPB call for two .1uf caps and I've been using poly film with no problems.

freak scene · March 23, 2006, 03:07:37 PM

i just built this using .1uf poly film and it sounds great.

kvb · March 23, 2006, 03:55:01 PM

http://smallbox.zeonhost.com/

here are some great looking layouts

This is what I was talking about.

But, it seems that some of these parts are not so critical. I just don't want to put the thing together incorrectly.

bass_econo · March 23, 2006, 04:11:47 PM

I have an LPB and none of them are electrolytic but the cap coming from the pot (if I'm following right...since they are all wired together) is a .15uf while the other is a .1uf. I don't think the .15uf or a .1uf will matter though really.

Mark Hammer · March 23, 2006, 04:19:40 PM

I would imagine that anything from .1uf through to .47uf would be just fine. Tantalum are not at all necessary, and maybe even to be avoided, if only because they are polarized (hence prone to mis-installation by novices) and generally more expensive than other types. Regular old "greenies" or any other plastic cap will do a nice job.

These caps simply limit low end and block DC from getting in or out. Chances are that they already allow more than enough bass through, but a little more wouldn't hurt. That's why I say anywhere from .1 to .47.

Why on earth a circuit this puny (you could literally build it on a piece of perfbaord and fit it to the back of your guitar's volume pot with some hot glue) would require a 1590BB, as suggested in the build article, is beyond me. Two thirds of the required space in the box will be taken up by the battery and switch.

aron · March 23, 2006, 04:34:11 PM

I agree with Mark, almost any value greater than .1uF would work. The limit might be the size of the caps.

kvb · March 23, 2006, 04:46:04 PM

I guess I will build the thing and just twist the caps in.
That way I will be able to change them around quickly and determine what sounds best to me.
thanks for speedy replies

skiraly017 · March 23, 2006, 04:49:08 PM

My "head up my a--" anecdote regarding a LPB build.

One day while very tired and not paying attention, I built an entire batch of 10 LPB's with .01 caps instead of .1's.

I now have 10 treble boosters I need to box up and sell.

phaeton · March 23, 2006, 11:26:28 PM

Quote from: skiraly017 on March 23, 2006, 04:49:08 PM
My "head up my a--" anecdote regarding a LPB build.

One day while very tired and not paying attention, I built an entire batch of 10 LPB's with .01 caps instead of .1's.

I now have 10 treble boosters I need to box up and sell.

Excellent!

Of course, you *could* desolder/resolder, right?

Btw, is "0.1uf" the magic dividing line? Anything smaller starts cutting bass... ect...?

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LPB-1 Q