Home Brew Al K Universal crossovers.

[BubbaH]

Is chip still in that line of work?

 

[laatsch55]

No, a struggling musician now...

 

[laatsch55]

I just hooked up the 700 he's getting his shit blown away roght now......

 

[laatsch55]

Chip during "God Particle".....

 

[laatsch55]

He's listening to Patricia Barber right now. He's ...............mesmerized.......

 

[laatsch55]

The crossover has survived an onslought of the most extreme order. Originally designed for 1-1/2 amps , a 5 amp fuse now resides within.....I went beyond the stopping point I usually stop at on the Spec 1 by 2 notches, in part because Chip was here, the other part because I HADN'T gone there before. Guys I really do not know how far this system can be pushed..It's dangerous the way it is and I like it that way....knowing how extreme it can get is somehow very satisfying.....and I still don't know where I HAVE TO STOP................

 

[laatsch55]

It sounds like you're having some fun - I wonder if the new caps require some break in.

Dennis they are running right with the crossiver that is 4 years old....

 

[laatsch55]

Was ordering some stuff from Bob Crites today and we got to talkin about caps. Come to find out he sells Sonicaps, one of Al K's substitutes. So I had him send another 8 of those. Sonicaps are made in the USA also. If you ever need something from Crites don't hesitate, great family business and Bob is a heck of a nice guy....

 

[laatsch55]

OK, a quetion for Joe, or Gibsonian, or someone who know speaks better than I do, ......can the caps in the crossover make noise sometimes, and then sometimes not?? The scrath siims to come and go, not as bad as when the Pig was in line, I eally do believe I wounded the Pig. Even with the FC WOPL in line and new mid drivers and diaphrams the scratch is there, ....sometimes.....I have ot messed with the stosses but that's next on the list, the caps for the mids I have plenty of, just curous about the sometimes nature of this "scratch".

 

[Gepetto]

OK, a quetion for Joe, or Gibsonian, or someone who know speaks better than I do, ......can the caps in the crossover make noise sometimes, and then sometimes not?? The scrath siims to come and go, not as bad as when the Pig was in line, I eally do believe I wounded the Pig. Even with the FC WOPL in line and new mid drivers and diaphrams the scratch is there, ....sometimes.....I have ot messed with the stosses but that's next on the list, the caps for the mids I have plenty of, just curous about the sometimes nature of this "scratch".

Unlikely Lee...not surprised you wounded the pig given what you did to it at Timdalfs

 

[laatsch55]

Fixed it after that, then got real radical here a few nights ago. When I get a chance I'll run a THD & N sweep and see what's up. But I know the 700 isn't hurt and I've checked all the cables and whatnot. Ok can a cap be sensitive to the power going through, as the volume comes up the scratch starts to subside, but still sounds lkike something is missing...

 

[laatsch55]

Do Polypropylene caps "heal"?

 

[Gepetto]

Do Polypropylene caps "heal"?

Yes
if you think it might be the cap, try replacing one side and see if it persists after the replacement.

 

[laatsch55]

Can't get it to do it now, sounds excellent. Even at low volume

 

[Skratch]

OK, a quetion for Joe, or Gibsonian, or someone who know speaks better than I do, ......can the caps in the crossover make noise sometimes, and then sometimes not?? The scrath siims to come and go, not as bad as when the Pig was in line, I eally do believe I wounded the Pig. Even with the FC WOPL in line and new mid drivers and diaphrams the scratch is there, ....sometimes.....I have ot messed with the stosses but that's next on the list, the caps for the mids I have plenty of, just curous about the sometimes nature of this "scratch".

I had a similar problem with an Altec 288 midrange driver, it turned out to be a piece of shit in the voice coil gap.

 

[NavLinear]

I had a similar problem with an Altec 288 midrange driver, it turned out to be a piece of shit in the voice coil gap.

So - did you remove it? How'd it get there?

 

[Skratch]

So - did you remove it? How'd it get there?

Have no idea how it got there. Removed it with a folded piece of masking tape that I ran around the gap. I do that on all drivers that I change diaphrams.

 

[laatsch55]

We;;, found some weak spots in the crosses. Going to need a big non-inductive power resisror, and don't know what to do about the cap....
The resis tors got so hot, it melted the solder off the connection...

 

[NavLinear]

We;;, found some weak spots in the crosses. Going to need a big non-inductive power resisror, and don't know what to do about the cap....
The resis tors got so hot, it melted the solder off the connection...

What wattage do you need? Here are some 800 W non inductive ones - no solder required.

http://www.mouser.com/ds/2/427/lps800-103978.pdf

 

[laatsch55]

That should do it..