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Old 15th August 2012, 05:17 PM   #2711
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Just checked my email history and realised I haven't heard from him in a while either. I'll shoot off an email and see if everything is OK.

As for the ODA, nope, no info...
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Old 15th August 2012, 05:24 PM   #2712
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He's still posting replies in the latest blog entry on his site about once a week or so.
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Old 15th August 2012, 05:26 PM   #2713
mikeaj is offline mikeaj  United States
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After a quick check, it looks like he's posted in the comments of his own blog as of yesterday, so I presume he's still alive and kicking, doing alright. He's probably just busy with real life and/or finalizing ODA or ODAC-related documentation or design.

I'm kind of curious what the final O2 -> ODA changelist will be too.
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Old 17th August 2012, 05:57 PM   #2714
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Yep, just heard back from him; he has just been having a busy Summer. He says that the ODA is a bit behind schedule but still coming... He didn't say when though, the tease!
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Old 18th August 2012, 10:28 PM   #2715
VJK is offline VJK
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Anyone know the difference between NE5532APE4 and the NE5532AP ? The APE4 costs a bit more AFAIK, but I want to know why...I am planning to use this one instead of the default NJM2068D. Thanks in advance.
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Old 19th August 2012, 12:05 PM   #2716
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and while we are at it why not use the NJM5532D instead as NWAVG/RS seems to prefer ICs from that company. The NJM part seems to have slew rate 8v/us instead of 9v/us for the same part from other companies.
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Old 19th August 2012, 02:20 PM   #2717
MrSlim is offline MrSlim  Canada
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To be honest, I don't think it will matter which one you use. NJM seems to be very good value for the money.

Have you read This page, to understand why he chose the NJM2068? (it beats the 5532 in noise except at higher gains..)

Last edited by MrSlim; 19th August 2012 at 02:33 PM.
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Old 19th August 2012, 06:38 PM   #2718
VJK is offline VJK
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Thanks for the quick responce Mr Slim . I have indeed read that article; I should have probably explained better. I was planning to build an ODAC+O2 combo for a friend of mine who intends to use it with a DT880-600 Ohm and since the 5532 seems to perform marginally better at gains >5x, I thought it was a good idea. On another note I did find a note on NWAVG/RS blog (in the comments section) that he did test the NJM and did not find any significant difference between that and the NE part.
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Old 20th August 2012, 05:10 PM   #2719
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I've just finished building the O2 amplifier but how important is it to clean the back of the board to get rid of flux residues?
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Old 20th August 2012, 08:07 PM   #2720
MrSlim is offline MrSlim  Canada
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Quote:
Originally Posted by Rullknufs View Post
I've just finished building the O2 amplifier but how important is it to clean the back of the board to get rid of flux residues?
It's not critical. I used to be anal about it, but you are more likely to cause problems with flux getting into the switches or the jacks by trying to clean the board.
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