Abomination! or Painting a Mustache on the Mona Lisa meets the Island of Dr. Moreau - Page 9 - diyAudio
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Old 16th December 2008, 12:51 AM   #81
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Quote:
Originally posted by stinius


I see that people think you are too "inspired" by the RMI,
Hi Stinius,
I don't think I owe anyone any explanations or apologies. I tried to work with roender in the beginning, presented my ideas on his thread and he was not open to it.
It's not hard to track down the history here.
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Old 16th December 2008, 01:10 AM   #82
KLe is offline KLe  Australia
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Hi MJL21193

I have just had another look at Post #71.
Actually, the 3rd is slightly higher than the 2rd (both less than -100db), and the 4th order and higher harmonic artefacts are all below -125db ... that's quite stunning and did I say real nice, really real nice

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Old 16th December 2008, 01:10 AM   #83
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Quote:
Originally posted by PB2



Your jabs

Hi Pete,
If you had an email button I would have sent you a note.
I appreciate all of the help I have gotten on the many projects I have done since coming here. It should not be overlooked that this is a DIY site where we all are supposed to design, build and learn. I don't think I'm overstepping my bounds here by saying that I have given back as much or more than I have taken from here.

Now I tried to put a bit of a humorous spin on the situation here, but I can see that it went right over your head. As usual.

We are all different, I know. My reaction to someone wanting to take one of my projects and change it or improve it would be one of interest and enthusiasm. I wouldn't feel threatened by this. I wouldn't say: "do what you want, but don't refer to it in the same breath as mine". I'd feel flattered and vindicated that something that I did here made some difference.
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Old 16th December 2008, 01:15 AM   #84
KLe is offline KLe  Australia
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Hi MJL21193

I am not sure about the name BAIN though

I can only assume that it is the BAIN of your Life

very nice ... keep up the good work
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Old 16th December 2008, 01:26 AM   #85
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Quote:
Originally posted by KLe

Actually, the 3rd is slightly higher than the 2rd (both less than -100db), and the 4th order and higher harmonic artefacts are all below -125db
I will have to take the plunge and board this up so that I can test it. The simulator does a good job of pointing in the right direction but the truth comes out in the real thing. I think the THD figures are close to accurate, but I don't put a lot of faith in the distribution on the harmonics. I think the simulator is just "guessing" there.
Still, low is low and better than high, right?


Quote:
Originally posted by KLe

I am not sure about the name BAIN though
That popped into my head while I tried to think up a name for the sim file. Fits with the theme I think.
Anyway, tis too late - I've already busted a champagne bottle on her bow...

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Old 16th December 2008, 01:30 AM   #86
KLe is offline KLe  Australia
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Hi MJL21193

On another note ... what do you think about having an efficient Power Reg to go with these nice Amps ... any ideas.
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Old 16th December 2008, 01:31 AM   #87
PB2 is offline PB2  United States
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You have a way of dropping insults, it went over my head?
It is said that there is always some truth in humor, and it is your underhanded way of continuing to annoy him because you didn't like his reaction. There are much bigger things in life - get over your dislike of his response. You could simply respect his wishes and get out of his thread quietly without drama. Which I will now do with yours - not worth the time.

Enjoy your hacking and patchwork, but do the forum a favor and stop deliberately annoying people who have made significant positive contributions.

You say you appreciate the help that you've gotten, talk is cheap, I judge people by their actions.

Please don't email me.

Pete B.



Quote:
Originally posted by MJL21193



Hi Pete,
If you had an email button I would have sent you a note.
I appreciate all of the help I have gotten on the many projects I have done since coming here. It should not be overlooked that this is a DIY site where we all are supposed to design, build and learn. I don't think I'm overstepping my bounds here by saying that I have given back as much or more than I have taken from here.

Now I tried to put a bit of a humorous spin on the situation here, but I can see that it went right over your head. As usual.

We are all different, I know. My reaction to someone wanting to take one of my projects and change it or improve it would be one of interest and enthusiasm. I wouldn't feel threatened by this. I wouldn't say: "do what you want, but don't refer to it in the same breath as mine". I'd feel flattered and vindicated that something that I did here made some difference.
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Old 16th December 2008, 01:42 AM   #88
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Quote:
Originally posted by PB2
You have a way of dropping insults,

I judge people by their actions.

Please don't email me.

I can't email you - you are here in stealth mode without an email button.

There's the difference: I don't judge people.

Thanks for the help you've given in the past and you are more than welcome to stick around. I can use all the help I can get.
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Old 16th December 2008, 06:24 AM   #89
lineup is offline lineup  Sweden
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Quote:
Originally posted by MJL21193
Further tinkering has produced this:
http://i412.photobucket.com/albums/p...21193/BAIN.png

I have changed the devices in the CFP LTP to higher power and increased the current. I have also increased the current slightly through the VAS. This equates to much better simulated performance.
MJL21193.
As your nice amplifier is close to AD797 input and 2nd stage
you may some time when you wish,
try to use the AD797 second stage idea.

See attachment. Also same diagram can be found in AD797 datasheet.
This is a jcx posted variant of AD797.The LED in second stage is not in the original.

The idea is to use a floating mirror - gives at all output voltages same Vce across Q8 and Q9.
This is one of the secrets of AD797 exceptional performance.

Lineup regards
Attached Images
File Type: png ad797_floating-mirror_jcx.png (21.2 KB, 427 views)
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Old 16th December 2008, 06:33 AM   #90
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Quote:
By roender - Besides the fact that you have some mistakes in the schematic, the main two issues are related with highly asymmetrical clipping and headroom.
This is what "got me on the run" .. to explore how
your amp and mine handles mild and gross clipping.

The abomination does the best, it has less gain , just asymmmetric as noted above (just a little sticking)..livable .Mine sucked when overdriven.(both asym. and "sticks"... saturation)
First I thought it was the design..nope

Quote:
Are the 2SA1381's really warranted though
It was the 1381/3503's ,these devices EXCEL in normal
operation.. but when they saturate, they really stick hard.
So , I resimmed mje 340/350's.. bang, fixed the problem.
also, if you put a .1uf cap across the Re of the CM so even
spikes from near saturation are gone..

In your amp (abomination) I just had to adjust Re's on
the VAS cascode to get symmetric clipping ,added that .1u cap
(your V- CM is the same as mine) all your cascodes helped
prevent saturation for the most part.
OS
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