Project Ryu - DIY Field Coil Loudspeaker - Page 15

Frank40 · 5th February 2013, 04:26 PM

Here is a update on the wizzer/voice coil former. It went pretty well, it is durable for sure but for now I need to make a former a each wizzer. Hentai, I can try to make one with paper for you, but what kind of paper do you want to use.

Hentai · 5th February 2013, 04:31 PM

Hi Frank,

Looking good, looking good. How much does it weight?
Good paper is that used for calligraphy, should be around 100-150g/m2 density, 0.2mm thick.
Can you change the outer diameter to something bigger?

Frank40 · 7th February 2013, 04:55 PM

Hi Hentai

I am sorry to say that I had no luck in making a wizzer with paper, I only had silkpapaer so that is what I used. But I think if you are going to use paper it is best to use a positive and a negative form, under high pressure.

The weight is 3.8 gr with the voice coil. I did a quick test and it relay works...There is plenty of energy in the high frequency range, a super tweeter for real. My guess is that it start a around 4-5KHz and up, but this is just by judgeing by ear.

Here is some pic's:

Hentai · 7th February 2013, 10:17 PM

Very nice Frank,

I understand about paper. Can you make it from this material but for specific voice coil diameter, length and whizzer diameter?

Frank40 · 8th February 2013, 05:13 PM

Hi Hentai,

Sure I can make a pair of wizzers for you. But sense you have access to Machinery, the best way is if you make a former and send it to me. You can make it of any kind of hard plastic or even hard wood, and if you make it your self, you decide the dimensions. On the other hand... if you like I can show you in more details how I make them, the hard point is to make the formers when you don't have the prober machinery. Once you have the former, there is relay nothing to it.

KaffiMann · 8th February 2013, 06:54 PM

I apologize for intruding.

But where do you find a suitable selection of wire for VC?

Very nice thread btw! Best I've seen for ages!

JMFahey · 8th February 2013, 08:54 PM

For regular enamelled wire, check transformer winding supply houses.
Be CERTAIN to get "high temperature"wire, if possible "Class F/170 degrees Celsius" because nowadays thin wires often come in weak self fluxing enamel, which is designed to *evaporate* when hot.
VERY bad in a VC.

Frank40 · 9th February 2013, 01:28 PM

I some one help me. I need a large spider for a 35.5mm voice coil but I can't find a dealer, I would like to finde one at around 120 to 150 mm.

båndsei · 9th February 2013, 02:43 PM

Speaker Replacement Parts - MAT Electronics
Here is some spiders and voicecoils.It seems you have to cut the hole to the right size for the voicecoil yourself.

Bernt

Frank40 · 9th February 2013, 03:10 PM

Thanks Bernt

8th February 2013, 06:54 PM	#146
KaffiMann diyAudio Member Join Date: Sep 2009	I apologize for intruding. But where do you find a suitable selection of wire for VC? Very nice thread btw! Best I've seen for ages! __________________ Theory and practice.....

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5th February 2013, 04:31 PM	#142
Hentai diyAudio Member Join Date: Nov 2006	Hi Frank, Looking good, looking good. How much does it weight? Good paper is that used for calligraphy, should be around 100-150g/m2 density, 0.2mm thick. Can you change the outer diameter to something bigger?

7th February 2013, 10:17 PM	#144
Hentai diyAudio Member Join Date: Nov 2006	Very nice Frank, I understand about paper. Can you make it from this material but for specific voice coil diameter, length and whizzer diameter?

8th February 2013, 05:13 PM	#145
Frank40 diyAudio Member Join Date: May 2004 Location: kobenhagen	Hi Hentai, Sure I can make a pair of wizzers for you. But sense you have access to Machinery, the best way is if you make a former and send it to me. You can make it of any kind of hard plastic or even hard wood, and if you make it your self, you decide the dimensions. On the other hand... if you like I can show you in more details how I make them, the hard point is to make the formers when you don't have the prober machinery. Once you have the former, there is relay nothing to it.

8th February 2013, 08:54 PM	#147
JMFahey diyAudio Member Join Date: Mar 2009 Location: Buenos Aires - Argentina	For regular enamelled wire, check transformer winding supply houses. Be CERTAIN to get "high temperature"wire, if possible "Class F/170 degrees Celsius" because nowadays thin wires often come in weak self fluxing enamel, which is designed to evaporate when hot. VERY bad in a VC.

9th February 2013, 01:28 PM	#148
Frank40 diyAudio Member Join Date: May 2004 Location: kobenhagen	I some one help me. I need a large spider for a 35.5mm voice coil but I can't find a dealer, I would like to finde one at around 120 to 150 mm.

9th February 2013, 02:43 PM	#149
båndsei diyAudio Member Join Date: Dec 2008	Speaker Replacement Parts - MAT Electronics Here is some spiders and voicecoils.It seems you have to cut the hole to the right size for the voicecoil yourself. Bernt

9th February 2013, 03:10 PM	#150
Frank40 diyAudio Member Join Date: May 2004 Location: kobenhagen	Thanks Bernt