I have replaced the foam surrounds on the woofers and I am going to replaced
the caps in the the crossovers. When visually inspecting the crossovers I
noticed one of the inductor coils (small red plastic covered coil) was rather
crispy. The coil is not open circuit but I fear it may now be off value.I have
tried everywhere to determine the value of that inductor. Would you happen to
know that value?
Thanks Dale
the caps in the the crossovers. When visually inspecting the crossovers I
noticed one of the inductor coils (small red plastic covered coil) was rather
crispy. The coil is not open circuit but I fear it may now be off value.I have
tried everywhere to determine the value of that inductor. Would you happen to
know that value?
Thanks Dale
I don't see the value noted anywhere.
Your best bet is to measure it with a multimeter which has a mH scale:
Uni-Trend Group Limited
I have one of these, it cost about £70 at Maplin in the UK, don't think they sell it anymore.
Your best bet is to measure it with a multimeter which has a mH scale:
Uni-Trend Group Limited
I have one of these, it cost about £70 at Maplin in the UK, don't think they sell it anymore.
inductor
I think the inductors may be off value because of the high temps. Both inductors are burnt but still functioning, so I don't have a good reference to measure. Thanks for the reply.
I think the inductors may be off value because of the high temps. Both inductors are burnt but still functioning, so I don't have a good reference to measure. Thanks for the reply.
Pics would be helpful...of the entire x/over if possible. There are a number of Brits and Aussies here on DiyAudio with access to Wharfedales. Dimensions of the inductor as well, will come in handy.
I have a number of Wharfedale X/overs and may have matches for you that I could take mH measurements of.
I have a number of Wharfedale X/overs and may have matches for you that I could take mH measurements of.
Last edited:
I expect you could unwrap one and count the number of turns and then allow for a ferrite core and the area of the turns. I seem to recall a 1.5mH ferrite was about 5m of wire.
Isn't inductance proportional to the square of the number of turns or something? 😱
I expect it's about 2mH on the woofer bafflestep. Usually about 0.2mH on the tweeter.
Isn't inductance proportional to the square of the number of turns or something? 😱
I expect it's about 2mH on the woofer bafflestep. Usually about 0.2mH on the tweeter.
If you're really worried about the state of the inductors, you could easily rewind them.
It's an easy enough task to make a nice job if you keep the turns neat and use some decent tape to finish off.
Measure carefully and get the same gauge magnet wire, count the turns as you take them off and put the same number of new turns back on.
(Use sandpaper to strip the enamel from the ends of the wire, before soldering).
It's an easy enough task to make a nice job if you keep the turns neat and use some decent tape to finish off.
Measure carefully and get the same gauge magnet wire, count the turns as you take them off and put the same number of new turns back on.
(Use sandpaper to strip the enamel from the ends of the wire, before soldering).
- Status
- Not open for further replies.