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Old 8th November 2012, 08:56 PM   #1581
fas42 is offline fas42  Australia
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Quote:
Originally Posted by AndrewT View Post
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Good thoughts, Andrew. Before I comment further I would like to do some experiments with LTspice, get some feedback there ...

Frank
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Old 8th November 2012, 09:32 PM   #1582
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Quote:
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I have now read H.Ott's 1983 paper.
As far as I can see my suggested connections follow Ott's recommendations in all details.
There are certainly no fundamental differences between Ott's and mine. If there were I would look at how to modify my method.

All my suggestions have been developed without sight of Ott's papers and virtually all the information came from posts on this Forum. It would appear that there are many Members posting here that know what to do, I am simply the messenger, you Members are the Source. It is just that you get outnumbered by the ill-informed Members who post rubbish.
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Hi Andrew,
I know you often express your opinion quite straightforwardly, but I didn't understand why you state that someone posted "rubbish".

I found the thread with a reference to the 100K resistor between grounds, it is the SSA thread you attended too, and it seems (at least to me) interesting.

While official source is reported as a TI application note, both of our members/friends using this approach (mikelm and LazyCat surely several lightyears more skilled and experienced than myself) reported good results.

Simple Symetrical Amplifier

I've read of Ott's article first by Terry (Given) in this very thread, if I'm not wrong. The 100K seems to me addictive to the parasytic Z1 in Ott's schema and at first sight, and I can't see any adverse effect on signal noise.

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Old 9th November 2012, 09:13 AM   #1583
AndrewT is offline AndrewT  Scotland
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Sorry, I don't understand what you are referring to. Your link takes me to post3551: there is no mention of 100k !
I can't recall discussing, nor reading about, a 100k between two, or more, different grounds/returns.

It's not a "someone" I am referring to as posting rubbish.
I said
Quote:
the ill-informed Members who post rubbish
That probably exceeds a few hundred Members, maybe even exceeding many thousands of Members.
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Last edited by AndrewT; 9th November 2012 at 09:17 AM.
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Old 9th November 2012, 09:24 AM   #1584
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ok Andrew,
anyway strange enough, the link takes me - as intended - to post 2941.

I'd bet there is some caching local small issue preventing your browser to reach the post.

Ciao,

Stefano
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Old 9th November 2012, 09:25 AM   #1585
AndrewT is offline AndrewT  Scotland
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No, you gave the wrong link format.
I will go and look at post2941
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Old 9th November 2012, 09:27 AM   #1586
AndrewT is offline AndrewT  Scotland
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I still don't know what you are talking about.
I see reference to 100r and 100 ohm.
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Old 9th November 2012, 09:41 AM   #1587
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Ouch, beg your pardon, of course 100, not 100K.

Strange enough, I keep reaching page 295 which starts with post 2941, as I meant.

But I'm anyway referring of - that - resistor between the two grounds. Is this relevant to what you were stating about the two grounds, or am I barking at the wrong tree?

Stefano
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Old 9th November 2012, 12:07 PM   #1588
AndrewT is offline AndrewT  Scotland
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Are you now referring to post1575? There is a 100r there.
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Old 9th November 2012, 12:31 PM   #1589
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I'm keeping referring to
post 1575 of this thread (my post) and
post 2941 of

Simple Symetrical Amplifier (by LazyCat and mikelm, as I wrote)

Stefano
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Old 9th November 2012, 08:37 PM   #1590
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Well well, here we go again. Guess what am cooking........
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