John Curl's Blowtorch preamplifier part II

[sottomano]

Originally Posted by scott wurcer

See, it is the Krill.......

You are repeatedly mentioning "the Krill".
Would you care to explain or point to a site that I can understand what you are talking about?

[BV]

2 PMA
Can You post here cir with included models? I can try it in my version of MC.

[ThorstenL]

Hi,

Originally Posted by sottomano

You are repeatedly mentioning "the Krill".
Would you care to explain or point to a site that I can understand what you are talking about?

Krill - Wikipedia, the free encyclopedia

Krill is the common name given to the order Euphausiacea of shrimp-like marine crustaceans. Also known as euphausiids, these small invertebrates are found in all oceans of the world. The common name krill comes from the Norwegian word krill, meaning "young fry of fish",[1] which is also often attributed to other species of fish.

Not sure what this has to do with feedback or audio circuits though.

Ciao T

[sottomano]

Originally Posted by ThorstenL

.....Not sure what this has to do with feedback or audio circuits though...

Thank you Thorsten. Well, I wonder too....

[wintermute]

simple google search gives the real answer:

http://www.parttimeprojects.com/audio/diy/Krill.php
and
Krill - The little amp that might...

But you knew that already didn't you thorsten

Tony.

[scott wurcer]

Originally Posted by sottomano

Thank you Thorsten. Well, I wonder too....

Hint: This site has a search feature. It isn't pretty. The Krill amp had a pot that caused foruitous cancellation of distortion at 0 phase of load current (if tuned with an 8 Ohm load). My OPINION of course.

Knowing that the dominant terms in capacitor nonlinearity are very low order, a circuit that does nothing to the second and third harmonics but does on the higher order ones would be strange indeed. Not even investigating the process is typical.

So as far as I'm concerned we have two bona fide sets of modern devices that produce opposite results so nothing is proven by simulation. We now have subjectivists blindly using simulation to proove a point, cool.

[ThorstenL]

Hi,

Originally Posted by wintermute

simple google search gives the real answer:

http://www.parttimeprojects.com/audio/diy/Krill.php
and
Krill - The little amp that might...

But you knew that already didn't you thorsten

Simple google gives me what I linked. There was nothing audio related in the first 100 results.

And no, I did not know this before, cute output stage, seems like one of the Japanese "non-switching class B" circuits from the 80's that resolutely refused to sound anything like like "Class A" despite claims of "Super CLass A" and the like written on their frontpanels.

I wonder if this did any better?

Ciao T

[scott wurcer]

Originally Posted by PMA

I have shown results for both same input voltage (yesterday/today) and output voltage (my last plots).

Our sim software programs are not completely same, there are distinctions.

PMA some simulators need settings to assure that there are no numerical roundoff generated harmonics. I showed a plot, double precision noise is -300dB. Without using these settings I can't get below -100dB or so with LOTS of false harmonics especially in the presence of a large fundamental.

[wintermute]

Originally Posted by ThorstenL

Hi,

Simple google gives me what I linked. There was nothing audio related in the first 100 results.

Ciao T

well I hadn't heard about the krill before either (I figured it was a play on the krell name) so my input into google was "krill amplifier" and the first two hits were the ones that I put into that post

So now that is out of the road, the discussion can get back to audio rather than crustaceans

Tony.

[stinius]

Originally Posted by scott wurcer

See, it is the Krill. Hint, start swapping models and then change the magnitude and phase of the load like a REAL speaker and watch the fuzz at HF move around. At least the Krill tweak actually removed the dominant thirds. Just watching now.

Hi Scott

Bringing back memories.

BTW: O has opened his blog site, you need to log in to see or contribute, send him an email to get a password.

Cheers
S