Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans

[Chul]

Yes, Caddock would be better but these do not need heatsinks.. ha ha

I think the resistor load at power stage gives special sound, like SIT-1, sacrificing the output.

 

[Zen Mod]

me likee!

 

[indra1]

... there was a purchase of 12 pcs of THF-51S and two pairs of CMOQ4-LPC

And them THFs will stay in Opldf a good while for advance tune up session.

 

[Zen Mod]

I believe I'll squeeze them in (last) schmtc with 2SK180 , already posted here in thread ;

that will go on upcoming SEF/Babelfish M2 pcbs

two criteria are fulfilled :

- it is SIT , so fast as Sparrow's fart
- with that schematic , current distribution between parts is same Wakooo as in Papa's DEFiSIT - mosfet doing all the work , while SIT acting as error correction , or whatever correction ......... maybe Wakoo Correction

only jumping in to help when mosfet is outa breath

 

[indra1]

Have fun.

 

[Zen Mod]

I will , no worries

Tnx again for Hall chips idea !!

Indra is Da Man!

 

[dady]

Hi friends, congratulations with the findings and the buildings.
Don Carlo, one of my Verdi's favorite opera. Dark but incredible Romanzas.

 

[Zen Mod]

Tnx

Will finish measurements on Monday ;

as I said , need more oomph for amp input , to move it to full power ....... EMU1212 is not having enough swing as is

then will open separate thread , post latest schematic and call it done

then on to SEF amp , as soon I receive pcbs ........

 

[Russellc]

just from habit - my fave Philips 1uF MKC , as bypass on C1 and C2 position

did I wrote that Papa sent all caps in bubblie ?
....... more precisely - all parts , except small metal films

I also changed C2 to (also) my fave (125C , so industrial?) ELNA 470uF/35V

Just bought some of the Philips 1uF MKC devices, but only found yellow axial versions. where can I locate those blue ones?

Russellc

 

[Zen Mod]

MKC is MKC is MKC

just use what you have

 

[Russellc]

MKC is MKC is MKC

just use what you have

Yup.

Russellc

 

[Chul]

Can you call this a DEFiSIT ?

Maybe we can brodean the usable SITs this way?
Please let me know why or why not this would work... I am a dumb builder..

 

[Zen Mod]

with present state of 2 cells (multitasking in several planes, besides just finished late lunch , so cells starved more than usual) , I should say - why not

be careful how to manage these two voltage sources , noiseless is a must

observe F6 for few tricks , combined with M2 and DEFiSIT , of course

few clever tricks also buried in Antoinel's threads

 

[Chul]

Thanks mighty ZM.Good to see positive reply from you.
Those few trick woul take me long to get a grip. , and I will take time to understand.
Good day to you now, time to sleep for me here.

 

[Chul]

I had a quick look at F6 circuit and it looks like it has the right trick for this crude idea.. THANKS!!!
But I hope some one who is btter ready ghan I try and give some guide

 

[Zen Mod]

you'll must to give me some time

and even then , maybe you'll need to remind me

 

[Chul]

Sorry I typed with a tablet, almost asleep making typo.

I think the circuit can make a sound anyhow.. But is this the DEFiSIT, with those advantages that Nelson described?

1. Single-ended sound with such harmonics
2. Doubled output due to push-pull
3. Increased damping

Cheers

 

[Zen Mod]

well , it could be kind of "rearranging of standard" , as in Jazz music .....

however , without spending some time with simulations , I can't predict exact behavior of these wakoo combinations

if you go back , you'll see graphs I took from simulations , showing insane current distribution between active parts - up to the clipping , mosfet (lower part) is doing extra heavy work , while SIT is actually working against the mosfet ...... as sort of ( who knows , is it?) naturally born phenomena - error correction or what ....... anti-error correction

anyway , with xformers involved , where gates aren't tied tightly as in DEFiSIT , I believe we will not have that sort of current distribution ......

so , I can't promise when I'm going to make that sim for you , being pretty ocupied with daily work and soon to have SEF/Babelfish M2 zero gen pcbs , on which I hope to implement also THF51-S beasties ........

maybe after that ......

 

[Chul]

homework #1

per tips from mighty uncle ZM.

Stolen legos from F6, Sony VFet part 1, Nelson's DEFiSIT....

Before I do dumb things with my tower, let me hear from you what can be wrong.

Looking at F6 it seems Schade feedback seems possible, but it's beyond my head.(Opto coupler too)

But I once tried Schade feedback (know to me as partial feedback then) even to 300B triode and I remember it was good.
.

 

[Chul]

well , it could be kind of "rearranging of standard" , as in Jazz music .....

however , without spending some time with simulations , I can't predict exact behavior of these wakoo combinations

if you go back , you'll see graphs I took from simulations , showing insane current distribution between active parts - up to the clipping , mosfet (lower part) is doing extra heavy work , while SIT is actually working against the mosfet ...... as sort of ( who knows , is it?) naturally born phenomena - error correction or what ....... anti-error correction

anyway , with xformers involved , where gates aren't tied tightly as in DEFiSIT , I believe we will not have that sort of current distribution ......

so , I can't promise when I'm going to make that sim for you , being pretty ocupied with daily work and soon to have SEF/Babelfish M2 zero gen pcbs , on which I hope to implement also THF51-S beasties ........

maybe after that ......

You are not promising but you don't have to. I appreciate it enough!!

I have this Dual PSU 30V 3A CC CV and I think this is safe tool to try the circuit.

Cheers