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Old 12th February 2014, 12:25 AM   #321
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Quote:
Originally Posted by Trainerman View Post
Hi Do, I am using a SE input and output so do I need to run the - input to earth? I appear to have around 50mv of offset from both boards and I am wondering if this is down to the earth's?
Thanks
Paul
Hi Paul,

On input, short the -phase to AG and use +phase and AG, only use AG and +phase on output, do not short the -phase to AG on output.

Ciao!
Do
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Last edited by pinnocchio; 12th February 2014 at 12:37 AM.
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Old 21st February 2014, 10:32 PM   #322
JKoch is offline JKoch  Poland
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Hi

Here is the last PCB for PSU module.
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Old 22nd February 2014, 01:30 AM   #323
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Nice work JKoch,

I just saw your company's web site, now I can see how you're so good at PCB designs!

Ciao!
Do
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Old 23rd February 2014, 07:34 PM   #324
JKoch is offline JKoch  Poland
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Thank you for your admiration of my job. I am not such specialist as you think. Did you see my company's web site? I have my private web site only. Maybe you find not my site but other one?
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Old 11th April 2014, 09:48 PM   #325
Bensen is offline Bensen  Belgium
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Has anyone seen these on eBay?
What do you think, real or fake?

2pcs Supertex VN0104N2 VP0104N2 N Channel P Channel Dmos Fets TO 39 NOS NEW | eBay
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Old 12th April 2014, 12:26 AM   #326
Wolfsin is offline Wolfsin  United States
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From the US, the link does not resolve to anything so it is hard to have an opinion.
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Old 12th April 2014, 12:55 AM   #327
bcmbob is offline bcmbob  United States
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I contacted eBay a while back and learned they are now blocking third party links due to liability issues. If you copy the text as text - without ebay at the end - and paste it to your browser search box some results can be found. Still a bit of searching necessary.

2pcs Supertex VN0104N2 VP0104N2 N Channel P Channel DMOS FETs TO 39 NOS NEW
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Old 13th April 2014, 07:52 AM   #328
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Quote:
Originally Posted by Trainerman View Post
Hi Do, I am using a SE input and output so do I need to run the - input to earth? I appear to have around 50mv of offset from both boards and I am wondering if this is down to the earth's?
Thanks
Paul
Hi Paul,

If you short - input to GND you will cancel the action of the servo. JC80 is single ended input as it was on John's design. The chinese PCB is balanced input, but with servo acting on the - input.

Just use the (+) input and (+) output and you'll be fine. I am doing the same since almost one year although I have balanced amplifier and using both outputs since november.

Cheers!
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