No-Holds-Barred Lowther design? - Page 15

UKPD · 23rd December 2009, 11:11 AM

Seems there is some interest in the idea. I'm going to modify a cheap and chearfull driver to field coil over Christmas.

Cheers,
Peter.

BudP · 23rd December 2009, 07:48 PM

Peter,

If you have access to poly butedene coated magnet wire, soluable in alcohol, use that. The coil will hold it's shape without support and vibration noises will cease. The two I have made both ran into sonic differences dependent upon flux gauss, so you should have a way to alter this factor. Otherwise the sound was surprisingly good. However, for one of the experiments, Romy the Cat of all people, we could not settle on a flux density that was a suitable balance of characteristics, so, somewhat frustrating.

Bud

UKPD · 27th December 2009, 09:58 PM

Hi Bud,

Sorry for the delay, just normal Christmas chaos. What were ballpark figures for your coils in terms of resistance/inductance? I've got the driver prepared for winding, luckily it's got vented pole piece so it will be easy in a drill.
Unfortunately dont have poly-butadiene coated wire to hand, so enamel has to be.

Peter.

23rd December 2009, 11:11 AM	#141
UKPD diyAudio Member Join Date: Nov 2007 Location: Sheffield	Field coil experiment. Seems there is some interest in the idea. I'm going to modify a cheap and chearfull driver to field coil over Christmas. Cheers, Peter.

23rd December 2009, 07:48 PM	#142
BudP diyAudio Member Join Date: Feb 2007 Location: upper left crust, united snakes	Peter, If you have access to poly butedene coated magnet wire, soluable in alcohol, use that. The coil will hold it's shape without support and vibration noises will cease. The two I have made both ran into sonic differences dependent upon flux gauss, so you should have a way to alter this factor. Otherwise the sound was surprisingly good. However, for one of the experiments, Romy the Cat of all people, we could not settle on a flux density that was a suitable balance of characteristics, so, somewhat frustrating. Bud __________________ "You and I and every other thing are a dependent arising, empty of any inherent reality" Tsong Ko Pa

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27th December 2009, 09:58 PM	#143
UKPD diyAudio Member Join Date: Nov 2007 Location: Sheffield	Hi Bud, Sorry for the delay, just normal Christmas chaos. What were ballpark figures for your coils in terms of resistance/inductance? I've got the driver prepared for winding, luckily it's got vented pole piece so it will be easy in a drill. Unfortunately dont have poly-butadiene coated wire to hand, so enamel has to be. Peter.

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