|
General Asylum General audio topics that don't fit into specific categories. |
|
|
|
General Asylum General audio topics that don't fit into specific categories. |
|
In Reply to: Re: You will have to work backwards. posted by blackrock john on December 1, 2006 at 13:14:11:
"2-smaller spools of red wire w/ .4MH or 4MH printed on them"
->These are 4mH inductors"Lg yellow resisters w/ REL-CAP 4.0MFD +/-10% 200v ppmf405k2a rsl8904"
->These are actually capacitors, 4.0 microfarad...But how many?"2-sm yellow resisters with trw8519 4.0+/-10% 8279058 printed on them"
->There are likely 4 ohm resistors - need to confirm"2-sm black ones w/ 1068-7610- 4-65cxr 3-50ac-b 3uf-50vac"
->These are again capacitors, 3.0 microfarad"4 Versa tronics 100v np85-c 9242"
->These appear to be the tall skinny blue inductors (since there are four of them) We need to get a value for these, either by the "numbers" or you can simply have them measured.But here is what I count from the picture:
4 blue inductors
2 red inductors
2 large yellow capacitors
2 black capacitors
2 black capacitors (by each crossover)
1 "Cluster" with 2 small black caps and 1 small yellow resistor
1 "Cluster" with 1 med. black cap and 1 small yellow resistorThe two "clusters" could be a component substitution, where both "clusters" have the same "net" impedance. This can be measured. It may also be helpful if the individual cluster components can be isolated and measured - you need to be sure that the "small yellow resistor" in this cluster is indeed a resistor - and not a cap (just like the LARGE "resistor" was a cap... right?
Hey - nobody said this was going to be easy!! But this is a really simple circuit for a three-way to be honest...
My initial guess? This is a first order three way parallel crossover with an RC countour network. There would be no L-pad on the tweeter circuit meaning no series resistor in the tweeter path. The woofer circuit would likely be the two blue inductors in series. The mid circuit would be the red coil in series with one of the caps *and* the contour network (most likely the countour is on the mid circuit, but this needs to be confirmed). The tweeter circuit is the "other" large black cap in series with the tweeter. But, of course, this is just a preliminary guess - so don't run with this just yet.
Get back on the discrepancies I have outlined.
Don't connect anything yet...
Cheers,
Presto
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Your bill of material doesn't jive with the photo... - Presto 12:22:31 12/04/06 (1)
- Correction. - Presto 09:06:57 12/05/06 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
