Further tweaks ....
AE was "a little light on the back-end" (Riddick) - LF THD was a bit higher than it (could be).
(below) , changed the VAS to a "folded/mirrored hawksford" ... WOW , now I
have that <10ppm at the earths frequency (schumann res.@ 7.8hz).
Local FB through the red led's linearized the LF in a major way. Current mirrors
now need to carry the red led's current , too. But they are low voltage , I'll have to
calculate wattage for them
Would not want alien to be bested by earthly tech. Servo caps = 2.2u for good
8hz thd . 20hz is 3ppm - very good.
OS
AE was "a little light on the back-end" (Riddick) - LF THD was a bit higher than it (could be).
(below) , changed the VAS to a "folded/mirrored hawksford" ... WOW , now I
have that <10ppm at the earths frequency (schumann res.@ 7.8hz).
Local FB through the red led's linearized the LF in a major way. Current mirrors
now need to carry the red led's current , too. But they are low voltage , I'll have to
calculate wattage for them
Would not want alien to be bested by earthly tech. Servo caps = 2.2u for good
8hz thd . 20hz is 3ppm - very good.
OS
Attachments
No , but messin' with it can have strange effects on earthly organic life.
(not conspiracy theory). Actually, proposed DARPA weapons.
Example - 64' church organ , or a 32' (at certain points in the hall) will evoke
"godlike" feelings. Your "earthly frequency" is being manipulated. 😀
OS
(not conspiracy theory). Actually, proposed DARPA weapons.
Example - 64' church organ , or a 32' (at certain points in the hall) will evoke
"godlike" feelings. Your "earthly frequency" is being manipulated. 😀
OS
right, so the you tube recording was probably low 30s or so.
Organs don't give gome me god like feelings, but half a bottle of whiskey can😀
Organs don't give gome me god like feelings, but half a bottle of whiskey can😀
Are you taking about Valery's boards? I'm still waiting on some parts. Not a good design to etch to sides. There are a lot of vias, some under SMD parts. I also have to leave the electrolytics elevated slightly so I can solder top and bottom. I'm learning some lessons on this one.
I already built the Krypton ND on the original layout. Are you asking about the new double-sided boards? I am of course up for testing that one. 😀
I've got Kypton-ND ready for testing but there are layer changes under the caps on it too. I'll post some PDFs after I get a chance to check it over one more time.
ND and the alien ...
Do a nice job , Jeff.
ND= the best CFA ... by far. Thermally cancels , clamps on clip , DC servo goodness ,
and real low distortion.
The new "AE" nearly seems to be it's VFA equivalent - does the same things.
Performance (totally different design), nearly mirrors the ND in every way.
Strange ?? I suppose they are both symmetric designs .....
OS
Do a nice job , Jeff.
ND= the best CFA ... by far. Thermally cancels , clamps on clip , DC servo goodness ,
and real low distortion.
The new "AE" nearly seems to be it's VFA equivalent - does the same things.
Performance (totally different design), nearly mirrors the ND in every way.
Strange ?? I suppose they are both symmetric designs .....
OS
Since both the Krypton-C and the ND are both CFA what is the operational difference between the two? Aren't they two both servo controlled, what makes the ND superior to the C version?
C is both capacitor coupled and servo'ed. ND is straight servo. ND is also faster.
ND should be a better bass amp (ppm LF).
It was suggested to use larger caps on the C , I say -just get rid of them (ND).
I had the C's for a month , the spooks for a few months. Both have strengths.
I think the ND is a spook + C combo. It simulates like a "mix" of the two.
(fast slew + super low LF thd).
My new "AE" also has these attributes (in simulation). I suppose I'll have
to plug in a couple ND's to really see if the correlation between specs and
SQ pan out.
Oh .. also - LC don't like the ND😀.
OS
Funny , huh ?
No disrespect , in fact .... total respect.
Started a "revolution" in DIYA land.
One faction went commercial , another public.
Either way , the builders win. WAY better than Ebay.
PS - I ran the wolverine pairs on my main amp , the cascoded IPS's are a step
beyond. I knew this in pre-badger days , but my standard EF2 would not do
the cascode justice. Now , with the slew EF3 - we have something better than
a 20 year old design (the leach). I lied a little , the H/K design is a 30 year old
Japanese creation with a better bias circuit ... actually. 😱
OS
No disrespect , in fact .... total respect.
Started a "revolution" in DIYA land.
One faction went commercial , another public.
Either way , the builders win. WAY better than Ebay.
PS - I ran the wolverine pairs on my main amp , the cascoded IPS's are a step
beyond. I knew this in pre-badger days , but my standard EF2 would not do
the cascode justice. Now , with the slew EF3 - we have something better than
a 20 year old design (the leach). I lied a little , the H/K design is a 30 year old
Japanese creation with a better bias circuit ... actually. 😱
OS
Hi Pete,
You are finding what I have been saying all along. Each one of these IPS are wonderful. You can plug in the Spook, Wolverine, Krypton, Symasui, CFA-XH, etc. It really doesn't matter. You'll be hard pressed to hear anything that shouldn't be there. Even Valery's and Borys' IPS's are amazing used in the Slewmaster. They are all better than our ears can hear. Good on you!
Blessings, Terry
You are finding what I have been saying all along. Each one of these IPS are wonderful. You can plug in the Spook, Wolverine, Krypton, Symasui, CFA-XH, etc. It really doesn't matter. You'll be hard pressed to hear anything that shouldn't be there. Even Valery's and Borys' IPS's are amazing used in the Slewmaster. They are all better than our ears can hear. Good on you!
Blessings, Terry
If you did plug some "bad IPS" into the slewmaster , you better bet that the EF3
would instantly fry your speakers or let you hear a "screwup". The OPS is
just a precision "magnifying glass" . poop in , poop out !
This is why i was so careful in laying out and testing the new "slew".
By simulating "screwups" and capacitance's far beyond what the real world
could bring forth , this assures even strange "alien" IPS's will always work.
The "infidel" became a local "radio station" for Thimios. 😱 The EF3 did its job -
amplified MHZ ! 😱
Edit - there are failures ....
OS
would instantly fry your speakers or let you hear a "screwup". The OPS is
just a precision "magnifying glass" . poop in , poop out !
This is why i was so careful in laying out and testing the new "slew".
By simulating "screwups" and capacitance's far beyond what the real world
could bring forth , this assures even strange "alien" IPS's will always work.
The "infidel" became a local "radio station" for Thimios. 😱 The EF3 did its job -
amplified MHZ ! 😱
Edit - there are failures ....
OS
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OS, as you see, we really need a table resuming all your babies characteristics, lot of people are... lost.
I had total respect too for L.C. And more than this, admiration for his real talent and friendship. I don't know what's happened, but there is a reinforced door between him and I ( and I think many of us), now. And on this door an inscription: "Marketing department, do not enter".
No more schematics, not even measurements, only teasing advertisements, nothing i can find an interest in. I don't read the FO thread any more and I am very sad of this situation.
Well, how to say... When the things turn too much commercial, we lost a lot of things. The occasion to increase knowledges, the pleasure to share, and even the friendship that is the most enjoyable part of the life and use to grow on exchanges of gifts.
I had total respect too for L.C. And more than this, admiration for his real talent and friendship. I don't know what's happened, but there is a reinforced door between him and I ( and I think many of us), now. And on this door an inscription: "Marketing department, do not enter".
No more schematics, not even measurements, only teasing advertisements, nothing i can find an interest in. I don't read the FO thread any more and I am very sad of this situation.
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I too built the infidel. It played but wasn't stable. I set it aside because Thimios was building one too and I figured he and you would have better luck with it. Never did get it working. The only other one I had trouble with was the Gnome. Mine isn't stable but Thimios said he got his working. All of the others work so well I can't pick a favorite. Maybe you can.
I agree , it has gotten "out of hand".
First , just one output stage - the new one , fully documented.
Then , I have to pick the best of the IPS's , or fully document and refine them all.
The biggest problem is the first post and the ability to condense all projects in
one place. Now that i know what is required for manufacture , I could post those.
The problem is , 10 toner artworks , 10 gerbers ... too many attachments.
By giving so many options , I've "dug myself a hole".
Another factor , is perception. Many don't know what a 500W peak can
do for "realism" ! Tube and class A builders just think "first watt" .....
"Badger builders" usually just say "wow" , slew builders say what Terry says...
A VERY addictive hobby ! (a designers perspective).
OS
The next two (simetri/AE) will be rock solid. I've learned a few things this month.
PS - my brain "shorted" - a true "reboot" . That does sound crazy .... but I even
made friends with carlo's (DX) ! He is the S. american OS , I ... too - like my
shotgun. 😀
OS
I can help-you (if you want) to make-it on your web site (I was too a web designer at the end of my professional life ;-).