Hi,
Someone gave me a pair of crossovers from 2007 805S's. They have a 4.7 cap but the inductor isn't labelled and wondered if anyone here is familiar with these and could tell me what the inductor value is?
Cheers!
Someone gave me a pair of crossovers from 2007 805S's. They have a 4.7 cap but the inductor isn't labelled and wondered if anyone here is familiar with these and could tell me what the inductor value is?
Cheers!
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Thanks System7, much appreciated.
Do you have any idea how I can tell which version I have? (unfortunately I don't have the facilities to measure it)
Do you have any idea how I can tell which version I have? (unfortunately I don't have the facilities to measure it)
You probably have almost all it takes to measure inductance.
Computer, sound card, ARTA software (free), an amplifier,
resistors for a jig, some hook up wire...
Computer, sound card, ARTA software (free), an amplifier,
resistors for a jig, some hook up wire...
Hi Lojzek, how you doing?
I'll take a look into it. Is it straight forward and can you recommend a guide?
Cheers!
I'll take a look into it. Is it straight forward and can you recommend a guide?
Cheers!
Sounds a bit complicated to me.
I have a £70 multimeter from Maplin which is very accurate for coils and capacitors. It opens up some interesting interaction experiments too.
In fact I often find marked components are wrongly labelled. Some of my 0.2mH coils turned out to be 0.3mH. Which was handy, because I was low on those. 🙂
Worth mentioning that you can unwind coils for lower values. You take off less than you might expect, because inductance is the square of the number of turns. You can use the resistance scale to measure the DC resistance too. But DCR for say, 0.2mH is typically 0.2R with aircores.
I have a £70 multimeter from Maplin which is very accurate for coils and capacitors. It opens up some interesting interaction experiments too.
In fact I often find marked components are wrongly labelled. Some of my 0.2mH coils turned out to be 0.3mH. Which was handy, because I was low on those. 🙂
Worth mentioning that you can unwind coils for lower values. You take off less than you might expect, because inductance is the square of the number of turns. You can use the resistance scale to measure the DC resistance too. But DCR for say, 0.2mH is typically 0.2R with aircores.
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Hello Gracol,
I believe I'm doing well, who knows, I might be nuts though. A couple
more decades at best and I'm off to...you know 🙂.
The good news is that ARTA software works well with my prehistoric
sound blaster 128. I have been able to measure impedance with that
card without the use of an amplifier, only with a single resistor of 100 ohms.
The reading was correct. The LIMP manual that you'll be able to find will
tell in detail hows and whats to measure succesfully. The author himself is
a stand up guy, he gives his software fully functional for free with some
minor restrictions. I remember it takes some time to perform a sweep
to get an impedance graph.
ARTA Download
Thanks system7. I have a £40 one from Maplin, lol! Not sure it does inductance though. Will have to fish it out and have a look. Hopefully I can find it!
Thanks Lojzek for the pointers. I think we're all a bit nuts to one degree or another, lol!
I'll take a look into ARTA and the LIMP manual over the weekend and see how I get on.
Thanks Lojzek for the pointers. I think we're all a bit nuts to one degree or another, lol!
I'll take a look into ARTA and the LIMP manual over the weekend and see how I get on.
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