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MOX - active crossover
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Old 8th April 2004, 01:55 PM   #201
tiroth is offline tiroth  United States
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Thanks for pointing that out. The cost of a set of scored boards is less than I anticipated; it looks like a set of opamp boards (4)would be approximately half the cost of a MOX board.

I'll post a layout this weekend. If we can get >150 sign ups, I will order the opa boards too.

Hi Jens. Will respond ASAP.

EDIT: The cost was lower than first stated.
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Old 8th April 2004, 02:46 PM   #202
Andypairo is offline Andypairo  Italy
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Quote:
Originally posted by tiroth
Thanks for pointing that out. The cost of a set of scored boards is less than I anticipated; it looks like a set of opamp boards (4)would be approximately half the cost of a MOX board.

I'll post a layout this weekend. If we can get >150 sign ups, I will order the opa boards too.

Hi Jens. Will respond ASAP.

EDIT: The cost was lower than first stated.
Sorry but I somehow missed where has benn posted the cost (even if approximate) of such boards.... where can I find it?

Cheers

Andrea
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Old 8th April 2004, 03:13 PM   #203
tiroth is offline tiroth  United States
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I just meant the relative cost. I'll post the actual number once the board is finalized and I have a (final) quote from the manufacturer. I expect this to be a two step process like other recent PCB group buys; #1 a request for sign-ups at an estimated price, and #2 payment after price is confirmed. (I hope the price goes down from the initial estimate--this hinges on the level of interest)
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Old 8th April 2004, 04:26 PM   #204
tiroth is offline tiroth  United States
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Jens,

The PCB looks good to me.
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Old 11th April 2004, 05:59 PM   #205
tiroth is offline tiroth  United States
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Quote:
Originally posted by Andypairo
My idea was that it can be nice to have the discrete opamps with PCBs of the same quality of the main PCB, but only if it can be done at a "right" price.
Andrea
Andrea,

I've completed a layout and created a thread to discuss. I would welcome your comments.

http://www.diyaudio.com/forums/showt...?postid=369407

Thanks!
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Old 12th April 2004, 02:45 PM   #206
tiroth is offline tiroth  United States
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The thread for this group buy is here:
http://www.diyaudio.com/forums/showt...threadid=32095

The group buy wiki is here:
http://www.diyaudio.com/wiki/index.php?page=Moxbuy
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Old 17th April 2004, 09:36 AM   #207
promitheus is offline promitheus  Europe
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MOX - active crossover
Hello,

I just found this parametric equalizer from THEL in Germany.
www.thel.de

It has no coils so this makes it very simple.
P1 adjusts fo with 3 different ranges with the jumpers there.
P2 adjusts the amplitude
P3 is the Q

Tell me what you think.
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Old 17th April 2004, 09:37 AM   #208
promitheus is offline promitheus  Europe
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Here are the graphs for it.

the first picture shows the gain from -12 dB to +12 dB
with Q set at "0"

The second graph shows the gain for Q set at +
the third graph shows gain for Q set at -
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Old 23rd April 2004, 05:14 PM   #209
nar is offline nar
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I have made a compressed file of the opamp showing Parts list in Word , Solderside in PDF , Component Side in PDF , Serigraphy in PDF so that everything is always at the good scale ( for DIYers )I made all stuff with TCI so I have also .tci files
The layout is made by *6 to engrave several ops at the same time so you can cut afterwards or save money on fabrication costs



Unfortunately the zip file seems too big to be posted here as an attachement...

I'll try , but if doesn't work mail me if you want to look at the files (if you want to build those nice opamps !!! Very nice ...)

And if file is too big to be attached , then I will be sure not to be badly judged by Fred



Regards

Anael
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Old 23rd April 2004, 05:16 PM   #210
nar is offline nar
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Default Re

So it definitely doesn't work because too big ( 187k)

Moderator , could you make it or not please . I don't do it for me but for all diyers...help
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