Hey guys!
I've finally gotten my component values nailed down and working on the final layout. Here's a pic:
Here's a high-res version:
http://picasaweb.google.com/eisenbarth.ma/Crossovers
Tweeter input starts on bottom left, through cap to the inductor on the far left to ground (2nd order) then a resistor dividing network. Output is taken between two resistors on bottom.
Woofer coil starts on bottom right, then a RCL to ground.
Pretty simple.
Any comments? Can I get away with moving things closer together?
Thanks!!
I've finally gotten my component values nailed down and working on the final layout. Here's a pic:
Here's a high-res version:
http://picasaweb.google.com/eisenbarth.ma/Crossovers
Tweeter input starts on bottom left, through cap to the inductor on the far left to ground (2nd order) then a resistor dividing network. Output is taken between two resistors on bottom.
Woofer coil starts on bottom right, then a RCL to ground.
Pretty simple.
Any comments? Can I get away with moving things closer together?
Thanks!!
If you make sure that the inductors are NOT oriented in the same axis ( ie x,y,z ) you minimize magnetic induction and can then move them much closer.Can I get away with moving things closer together?
I don't know if you have read AudioXpress 5/01 ( Inductor Coupling ) Dennis Colin:
He outlines a variety of orientation options and coupling results.
Very good article - there was a earlier one that showed the effects of crosstalk on an oscilloscope.
Standard practice is 90 degree orientation and as far apart otherwise
He outlines a variety of orientation options and coupling results.
Very good article - there was a earlier one that showed the effects of crosstalk on an oscilloscope.
Standard practice is 90 degree orientation and as far apart otherwise
HK26147 said:I don't know if you have read AudioXpress 5/01 ( Inductor Coupling ) Dennis Colin:
He outlines a variety of orientation options and coupling results.
Very good article - there was a earlier one that showed the effects of crosstalk on an oscilloscope.
Standard practice is 90 degree orientation and as far apart otherwise
no, but sounds very interesting. I think I can reduce the size a bit.. if I could move the middle inductor down one hole and to the left one position in the grid. Like I said, I usually have things very spread out and haven't tried to really optimize things
Unfortunately I don't have a good link that covers "mutual inductance"
But I'm sure you have seen illustrations of the magnetic flux lines that expand out from the coil torus - the pole orientation is a line down the center of the hole.
The Big foil air core ( on the far right ) shares the same orientation as foil inductor on the far left.
Turn the Big one 90 degree so it's "hole" axis is oriented right to left.
Then all 3 coil are on different axis and can be closer.
( Not to be boring but mutual inductance is the principle behind transformer action )
But I'm sure you have seen illustrations of the magnetic flux lines that expand out from the coil torus - the pole orientation is a line down the center of the hole.
The Big foil air core ( on the far right ) shares the same orientation as foil inductor on the far left.
Turn the Big one 90 degree so it's "hole" axis is oriented right to left.
Then all 3 coil are on different axis and can be closer.
( Not to be boring but mutual inductance is the principle behind transformer action )
ah. Google helps us here:
http://www.audioholics.com/education/loudspeaker-basics/inductor-coil-crosstalk-basics
http://www.audioholics.com/education/loudspeaker-basics/inductor-coil-crosstalk-basics
Another very good link to this subject
http://www.troelsgravesen.dk/coils.htm
I have actually printed this out and have it above my work bench as an "Aide Memoir"
Regards
Ted
http://www.troelsgravesen.dk/coils.htm
I have actually printed this out and have it above my work bench as an "Aide Memoir"
Regards
Ted
HK26147 said:If you don't mind my asking...
Are you a tinkerer/tweaker? ( is this a work in progress & evolving )
OR
You do you want it to be a finished speaker?
nope, tinkering is finished
My queries were based upon how the crossover was to be integrated into the system.
For example: If I wanted to facilitate experimenting with the crossover further; I would not put the crossover inside the enclosure and instead run terminals out of the cab for each driver. With the circuit external - This facilitates the listening/adjusting cycle.
Many just want it done and mounted securely inside the cab.
I strongly suggest that the crossover circuit and input output points and circuit nodes be identified on the board. ( even if only with a sharpie )
In the same fashion as many printed circuit board have printed on the component side.
This is documentation and will help if/when the circuit is worked upon.
After a while you forget the details of old circuits.
What is the perf-board material ( thickness ) BTW?
For example: If I wanted to facilitate experimenting with the crossover further; I would not put the crossover inside the enclosure and instead run terminals out of the cab for each driver. With the circuit external - This facilitates the listening/adjusting cycle.
Many just want it done and mounted securely inside the cab.
I strongly suggest that the crossover circuit and input output points and circuit nodes be identified on the board. ( even if only with a sharpie )
In the same fashion as many printed circuit board have printed on the component side.
This is documentation and will help if/when the circuit is worked upon.
After a while you forget the details of old circuits.
What is the perf-board material ( thickness ) BTW?
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Loudspeakers
- Multi-Way
- Crossover Layout Comments