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Old 13th August 2013, 02:42 AM   #1701
Bonsai is offline Bonsai  Taiwan
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Quote:
Originally Posted by RNMarsh View Post
How about we go start a forum for just CFA topology discussion and leave Doug Self to his own page here?

-RM
Ok that's a good idea.

I've opened a thread up.

Mods, you may want to move the CFA stuff to that thread.
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Old 13th August 2013, 09:49 AM   #1702
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Originally Posted by RNMarsh View Post
How about we go start a forum for just CFA topology discussion and leave Doug Self to his own page here?

-RM
Hi Richard,

This sounds like a good idea. This CFA discussion has become quite interesting and fairly fast-moving.

Cheers,
Bob
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Old 13th August 2013, 10:02 AM   #1703
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Originally Posted by ontoaba View Post
...my CFA amp using 80dB loop @20k and more than 110dB loop @1k.
There is absolutely no way your amp. can have 80dB of loop gain at 20KHz and be stable. No way at all.
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Old 13th August 2013, 10:11 AM   #1704
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Where is this new thread or whats the title ?
Edit: Found it

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Old 13th August 2013, 12:10 PM   #1705
AndrewT is offline AndrewT  Scotland
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the CFA offshoot Thread is here
CFA Topology Audio Amplifiers
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Old 13th August 2013, 02:46 PM   #1706
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So... any comments on the 6th Edition?

Are there any supply problems? Some people's copies seem to have taken a long time to arrive.
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Old 13th August 2013, 03:26 PM   #1707
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Originally Posted by DouglasSelf View Post
So... any comments on the 6th Edition?

Are there any supply problems? Some people's copies seem to have taken a long time to arrive.
Oh, this thread was about your book?

Got my copy super quick from amazon.com, have skimmed through it, looks good so far...
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Old 13th August 2013, 03:46 PM   #1708
RNMarsh is offline RNMarsh  United States
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Quote:
Originally Posted by DouglasSelf View Post
So... any comments on the 6th Edition?

Are there any supply problems? Some people's copies seem to have taken a long time to arrive.
No trouble with finding it nor obtaining the fine book you've put togther in a timely manner.

One area that is particularly informative that one doesnt find often enough -- practical info about implimentation details that can ruin a good design's potential. You dont find that sort of thing in a SIM... just takes experience and practice and testing.

-Richard Marsh

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Old 13th August 2013, 05:16 PM   #1709
Mooly is online now Mooly  United Kingdom
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Quote:
Originally Posted by DouglasSelf View Post
So... any comments on the 6th Edition?

Are there any supply problems? Some people's copies seem to have taken a long time to arrive.
Well seeing as I only had the 3rd edition before, I find the 6th a much more "readable" or lets say "enjoyably readable" read. The human touch is more in evidence. Not read it all word for word yet but have noticed such things as you mentioning using two small signal devices for the VAS, something I have been playing around with for some time before I saw it in print. That was a surprise. As an in depth "reference work" on the general amplifier design subject, it builds on what has gone before and its position, shared with one or two others of different approach is assured.

Doubtless there will be (or already have been) the comments on what isn't included... so maybe for the 7th edition One thing I would like to have seen would be some in depth work on solid state relays for speaker outputs. Apart from extra cost/complexity I think they are a winner over mechanical solutions.

No book supply problems as such in that my copy arrived when Amazon predicted (a little before in fact) but it was galling to know it was available over 'tother side (no offence guys) and that we had to wait.
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Old 13th August 2013, 05:19 PM   #1710
jony is offline jony  Poland
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So... any comments on the 6th Edition?
I received my copy of your in Monday. So I don't have any comment except this one.
Marantz use Folded-cascode configuration in his amps.
For example in PM7000 and also in his HDMA modules.
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