| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2522.1 | Shooah, but waatch out theyah. | GIAMEM::DERRICO | WhereInTheWorldIsCarmenSanDiego? | Mon May 11 1992 11:01 | 13 |
|
You can put a 10-uf cap in there, but you have to put a "non-polarized"
one in. The voltage rating must be at least the value or greater. You could
probably call it bi-polar, but the common term that I know is just non-
polarized.
As far as sound goes, you will probably not hear any difference in the
sound between the two cap values. Like the difference between a .005uf and
a .0047uf... depending on what it's used for, it wouldn't make a difference.
Radio Shack, U-Do-It, Digi-Key, or Active Electronics should have something.
/J
|
| 2522.2 | Locating a crossover CAP | CADSYS::GATULIS | Frank Gatulis 226-6140 | Mon May 11 1992 11:53 | 10 |
|
Sometimes the non-polarized caps are difficult to locate. If you have trouble
locating the crossover cap locally, give New England speaker repair a call.
They have all that stuff. They are located on rt-28 in Stoneham but they'll
UPS you just about anything on the same day you call.
(617) 438-1786 NE Speaker Repair
Frank
|
| 2522.3 | | PELKEY::PELKEY | Snert ! Fetch me my dagger. | Mon May 11 1992 11:55 | 5 |
| Thanks!
I didn't think it was gonna be a problem...
//r
|
| 2522.4 | y | LEDS::ORSI | Cuz I felt like it....OK!?!! | Mon May 11 1992 12:05 | 32 |
|
>9 uf 70v AC is what appears to be the type of capacitor...
>I'm told it's BI-POLAR, or Non polarized (means same thing no ?)
>Anyone know if I could put something like a 10uf in there, or do I have
>to get an exact match ?
>/Ray
You can make non-polarized caps by taking connecting the "-"
ends of two polarized caps (so they are in series) that are
each TWICE the value you need. Example:
2 - 20�f polarized caps = 1 - 10�f NP cap
---------- ----------
-------| + 20�f - |---/---| - 20�f + |-------
---------- ----------
For PA applications, 100V caps should be used because they can
saturate and become essentially become a wire and then it will
suck to be your horn drivers.
Parts Express and MCM Electronics carry a full line of NP Aluminum
Electrolytic caps for xover applications. The 10�f 100V NP is ~$1.00.
Mylar caps have higher voltage ratings, but are ~3x Alum El's cost.
BTW, a 9�f cap is a ~1200 Hz xover if used with a coil for a 12dB/oct
slope. If used by itself, it's a ~2000 Hz 6dB/oct xover (not too good)
Neal
|