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637 Amplifiers
637 Amplifiers
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Old 14th January 2013, 06:28 AM   #101
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by TANDBERGEREN View Post
I would guessed 1KVA

yes, 1KVA for one Transformer 0-58.5V, for Channel amplifier.

Thanks
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Old 24th January 2013, 02:11 PM   #102
pinnocchio is offline pinnocchio  Canada
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Quote:
Originally Posted by keantoken View Post
Hey, which ferrite beads do you use for your FETs? Are they on both pins except the gate? Anyway it's an extremely nice build and looks incredible. Did you get the chassis from siliconray perhaps?

From your latest schematics it looks like this amp is a tweaked Goldmund clone rather than an OPA637.
Are those really ferrite beads or nylon spacers to keep mosfets aligned straight?

Do
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Old 24th January 2013, 02:24 PM   #103
pinnocchio is offline pinnocchio  Canada
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Quote:
Originally Posted by quanghao View Post
hi all!

take quite some time, and I finally completed amplifier 637, with such modifications and certain combinations, to invite you to view images!
Thank you
Very nice amplifier!

Which design is it based on? Are PCBs available?

Can you give us the URL of where you bought the chassis?

Thanks
Do
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Old 26th January 2013, 10:08 AM   #104
quanghao is offline quanghao  Viet Nam
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Quote:
Originally Posted by pinnocchio View Post
Very nice amplifier!

Which design is it based on? Are PCBs available?

Can you give us the URL of where you bought the chassis?

Thanks
Do
the Design , i can tell exactly in here, Because have some Rule (please see some page before)
only post the PCB and all the value.
The PCB , i can make for all, if you make it, I think you have Amli-end.
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Old 27th January 2013, 04:12 AM   #105
fredlock is offline fredlock  United States
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Yes, I'm very interested with the PCB. Are you going to make it and available for all DiY'ers? Or is it in the form of Group By? Let us know coz' everybody is waiting and interested to try.

Cheers,

Fredlock
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Old 27th January 2013, 05:47 AM   #106
quanghao is offline quanghao  Viet Nam
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Originally Posted by fredlock View Post
Yes, I'm very interested with the PCB. Are you going to make it and available for all DiY'ers? Or is it in the form of Group By? Let us know coz' everybody is waiting and interested to try.

Cheers,

Fredlock
yes, i can share all to you!
thanks
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Old 28th January 2013, 04:44 AM   #107
quanghao is offline quanghao  Viet Nam
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This is Power supply for Amplifier 637

and Transformer 0-58.5V /15 A x 2 ( about 1 VA for One transformer )
And 15V-0-15V for protect .

thanks
Attached Images
File Type: jpg Supply-637.jpg (240.0 KB, 379 views)
File Type: jpg Supply-VAS-+-CS.jpg (765.7 KB, 365 views)
File Type: jpg Tranfomer.jpg (627.0 KB, 331 views)
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Old 28th January 2013, 05:44 PM   #108
oiphy is offline oiphy  Norway
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very nice Quanghao
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Old 28th January 2013, 10:44 PM   #109
quanghao is offline quanghao  Viet Nam
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Originally Posted by oiphy View Post
very nice Quanghao
thank you!
quanghao
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Old 6th February 2013, 08:09 PM   #110
oiphy is offline oiphy  Norway
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Originally Posted by quanghao View Post
a few more pictures, many thanks!
hello.
I'm building telos. and wonder what value the inductor 18 t 1,5 cm?
value in mH? maybe I use foil inductor...
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