Field coil HELP !!!!! (Off Topic)

by GC, Sunday, January 23, 2005, 22:47 (4748 days ago)

Hi All,

Please can somebody enlighten me as to how to make these drive units work. I have a pair of Graetz BV8070 field coil 8" units. When i hooked up my amp to them all i get is sound somewhere between a whisper and quiet talking. The guy i bought from tells me that the voltage needs changing to 100v???? I have a 10w/channel amp . What do i need to do to get these working with my amp? Sorry if this seems dumb but i dont really know where to start !!! Any help would be appreciated. I will try to get some pics up of them. But i can email them to anyone who can help.

[image][image][image]

I have the pictures here now , at least.

Kind regards
gary

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Field coil HELP !!!!!

by GC, Sunday, January 23, 2005, 23:31 (4748 days ago) @ GC

Gary,

Not very knowledgeable on field coil drivers, but...

The magnet in a field coil driver is an electromagnet. So you have to run power through it. This is apart from the signal that runs from the amp to the voice coil. When I read your post, it seems like you only connected an amplifier and nothing else.

Did you power the field coil/electromagnet? If you didn't, there's basically no magnet in your drivers. And if there's no magnet, there's no sound.

Ivo

Hi All,

Please can somebody enlighten me as to how to make these drive units work.
I have a pair of Graetz BV8070 field coil 8" units. When i hooked up my amp
to them all i get is sound somewhere between a whisper and quiet talking.
The guy i bought from tells me that the voltage needs changing to 100v????
I have a 10w/channel amp . What do i need to do to get these working with
my amp? Sorry if this seems dumb but i dont really know where to start !!!
Any help would be appreciated. I will try to get some pics up of them. But
i can email them to anyone who can help.

[image][image][image]

I have the pictures here now , at least.

Kind regards
gary

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0

Ask at Audio Asylum High-Efficiency Speakers Board

by GC, Tuesday, January 25, 2005, 01:20 (4747 days ago) @ GC

http://www.audioasylum.com/forums/hug/bbs.html

There are some regular posters at the above board who are not only using, but also creating and commercializing new field coil drivers. So you should find the answers you need there.

Or, you can just give up and sell them to me . . . ;-)

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Field coil HELP !!!!!

by Bert @, Thursday, January 04, 2007, 00:49 (4038 days ago) @ GC

Hi Gary,

I just edited your post (made a copy from the old board and paste it here) so that you do not need to write it again...:-)

That's all I can help, I have no idea how to make those speakers work...

Ciao,

Bert

--
BD-Design - Only the Best!

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Field coil HELP !!!!!

by GC, Sunday, January 23, 2005, 22:57 (4748 days ago) @ Bert

Hi Gary,

I just edited your post (made a copy from the old board and paste it here)
so that you do not need to write it again...:-)

That's all I can help, I have no idea how to make those speakers work...

Ciao,

Bert

Hi Bert
Many thanks for that:-D :-D Hopefully one of our illustrious counterparts has the requisite knowledge !!

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