inductors for crossovers

[phatkev]

hi
i am planning on buy inductors for a crossover i am makeing i have calculated the values that i need but i dont know what type of inductor to purchase (sorry for my ignorance when it comes to this sort of thing).
the values i am using are .07mH and 1.2mH
any help would be appreciated.
Kev

[alan-1-b]

Kev,

have a look at:- Jantzen Audio Denmark - Leading coil and inductor manufacturer in Europe
under their Products, then to Coils page.
There is data about each different type,
and some other relevant matters if you search further down that page.

Jantzen inductors are well made, and are available via mailorder in the UK from Audio Components.
You can find their web-site listed under Dealers on the Jantzen web-site.

[Inductor]

Look at their power (Ex:18ga/16ga, not mentioned here anyway, I'm not using the conversion tables but in mm you can use 0,71 D/mm for tweeter only and bigger 0.95, 1.2 mm diameter for woofer), some of the websites have the inductance L/mH, R/Ohm and wire D/mm.

For woofer or tweeter use (standard) Air-cored Inductor products. Ex: 18ga

For woofers (low frequencies/high inductances) you can use Ferrite-cored Inductors. They usually have low R/Ohm (resistance). Ex:16ga

Wire Gauge & Diameter Calculator
Winding your own inductors

[alan-1-b]

Hi Inductor,

I think the Jantzen P-core, non-ferrite, type could work better than ferrites in the woofer filter if low resistance air-core too expensive for there.

[Inductor]

Originally Posted by alan-1-b

Hi Inductor,

I think the Jantzen P-core, non-ferrite, type could work better than ferrites in the woofer filter if low resistance air-core too expensive for there.

Thanks, that's more information than phatkev can chew on.

[phatkev]

thanks for the replies appreciate it
kev

[Loren42]

Originally Posted by Inductor

Thanks, that's more information than phatkev can chew on.

Well, while he is still choking (no pun intended, yeah, really ), should we mention that resistance is a factor in the total crossover design?

What about distortion with ferrite cores in the signal path.

[mondogenerator]

Originally Posted by Loren42

Well, while he is still choking (no pun intended, yeah, really ), should we mention that resistance is a factor in the total crossover design?

What about distortion with ferrite cores in the signal path.

If you choose a ferrite with good current capability, there is no reason to AVOID a ferrite core. smaller ferrite cored chokes can saturate at relatively low currents, i.e. 3 amps, but for my woofer LP filter i use a ferrire cored inductor with a saturation current of more than 10 amps. as long as you can minimise, or eliminate the risk of saturation, and the non- linearities it introduces you should be ok.

[Pano]

I agree.

[thoriated]

Say, anybody know exactly what the Jantzen C-coil cores are made of? Silicon steel tape, maybe? They say 'iron' in their advertising literature, but that doesn't sound so good for eddy currents.