sp300b

u sledecoj turi verovatno napravim vidoja i postavim na ootoob
msm, sta reci
@vinko rece "neka bude svetlost", napisa kod, i bi svetlost
 

 
 
 

Kad imaš alergiju na tupe kuhinjske noževe, kakvi su svi u iznajmljenom smeštaju, mora se nosi svoj. A muka mi od umotavanja u staru novinu istih.
Sad još fale slaninica, paradajz, lukac...

Brojevi  03, 07, 13 i 16, putuju u centralnu Srbiju.
Nakon toga, ostalo ih 4 (ljutih gusara).

Brojevi  03, 07, 13 i 16, putuju u centralnu Srbiju.
Nakon toga, ostalo ih 4 (ljutih gusara).

Kad se setis sifre od pre 10god.. Nisam jos izlapeo koliko mislim.
Sam falio kome?

dobio sam majicu
u tri boje bojenu
stigla mi je .......
 

4N + 4N + 4P Pucks
4 SIT polovnjaka
tisuća JFet buba
 

Sloba je sam svoju pcb nacrtao ......... zabava za letnje dane

a malko sam i SETisao, cisto da nedelja ne prodje nako
 
 

Babelfish XA252 SET
 

as my pal Indra, member of same Pantheon and evidently same Caste to which I belongs, asked ....... here is schm of Babelfish XA252 SET
fancyschmancy name for Schade iteration of full Mos OS, where upper output Mosfet is Schaded, so practically being emulation of SIT
gate resistor R50 increased to 750R, introduced new resistor R58 (18K)
SIT related parts (two rectangles of short dash lines) mounted - as for SIT iteration, but instead of M1 - IRF510 (we are using for SIT), placed DN2540
R46 changed to 33R
we need around 3V voltage level at left (inner) side of R50, so result as is - DN2540 gate voltage is 3-4V-ish (fine tune of R46 possible to achieve full symmetry of M1 and M3 gate voltages, trivial task) ; these being referenced to output node
all parts titles ref. to attached schm
once when I have final pcb, containing all 3 amps , schmtcs with proper nomenclature will be posted
I could avoid T8-Q9 30mA CCS, and route lower end of R46 to output node (M2 source), but as I already had CCS in place, why not using it
yes, as Indra said - Papa's fave gigglywiggly graphs are saying that 2nd is neg. in phase ; that not posted, just simulated, but no reason for doubt

...... and I figured few tiny details, how to make Schade iteration

now, just need few logic level TO220 mosfets , to put N pucks back ....... an will inform ya

few days
 
 

ima bolje i od najboljeg [emoji846] baš mi se sviđa ova iteracija sa Tokin SITom

napisah za prethodnu verzija sa mosfetima da je objektivno najbolji uradak iz Zenove kujne - SIT varijanta je sve to isto, ali subjektivno [emoji3]





prošli smo isti materijal kao prošlog puta, ali noga je nešto više cupkala

razlika je u prezentaciji koja kupuje iz prve - potsetilo me na prvo slušanje Defisita: isti karakter uz višestruko veću snagu

minimalno 30W snage po kanalu bi trebalo da bude dovoljno za bilo koje zvučnike.. za ove moje nismo prelazili četvrtinu

čestitam [emoji846]

Babelfish XA252 gives you all details .........so you can form your own Opinion
Babelfish XA252 SIT gives you ready Opinion, with all details, and it doesn't care what you think
go figure
 
 

Babelfish XA252 SIT - graphs , 4R load, BFR=510R

Load changed to 4 Ohms

current mirror is having programmed current at one side, while other side of current mirror is increasing or decreasing own current, so that voltage sags stays constant
current of "working" side of CM is changed simply by effect of changing voltage between rail and base, while emiter resistor is not changing ........ so effect must be change of current though part
contrary to that, reference halves of CM are having everything constant - both current through them, same as constant voltage between bases and rails

Conclusion !
 

My preferences:
-Babelfish XA252 (that being All Mos):
rails between 30 and 35Vdc - depending how much power is needed, Iq everything between 1A and 2A, depending how much aluminum is on disposal, BFR-22R
 
-Babelfish XA252 SIT:
rails 30Vdc, Iq 2A, BFR-22R
Hasta La Vista, Baby........ I'll be back!

Pudding:
 
 

valja - u stvari odlično je, a to izjavljujem oficijelno [emoji3]



po objektivnim kriterijumima, a to bi prvenstveno bila količina izobličenja (nema ih), harmonijska šema (usklađena, drugi naglašeniji), neutralnost i dubina scene, ovo pojačalo je možda i najbolje koje je izašlo iz ZM kujne

analitično ali nije naporno, detaljno ali i muzikalno - sa njim bi moglo veoma lepo da se živi..

izmaltretirasmo ga materijalom koji bi lako pokazao slabosti (prvenstveno Come in - Kremer - Gridenko - Martynov):











ali, odolelo je [emoji846]

karakterom najsličnije BJ2, ali nešto "pitomije" od njega.. problem je što je lestvica podignuta veoma visoko pa vilici nije lako da padne.. a, pala bi i ostala tako [emoji846]

veoma snažno pojačalo, držalo je Irona na prvoj trećini (na phono ulazu na četvrtini) snage

čestitam [emoji846][emoji106]

P.S. a još smo se lepo i družili, Vrač i ja naravno [emoji846]

prepis sa Big DiyA
no way da kucam ponovo, zato copy-paste
 
///////////////////////////////////////////////////////////////////////////////////
Few years ago, we had enormous fun in funny named thread : F4 Beast Builders : https://www.diyaudio.com/forums/pass-labs/300233-f4-beast-builders.html
Well, you can call it Group of Hysteric Housewives Brainstorming 
Result of that was that I have myriad of back of napkin sketches, and after these I started simulating ...... and simulating ... and simulating
After myriad of these ( out of sheer enthusiasm I even made pcb files for some of iterations), I finally had made nice smallish channel pcbs, containing OS having different-ish approach to biasing than Papa's original XA25 is having, while FE was in principle same as Papa's, but with few beautiful quirks, of which I was damn proud (yup, Mighty ZM reinventing Da Wheel, time and time again)
And they were sitting, populated, on my shelf ........ always being pushing to bottom of list; I knew they would work, but somehow I wasn't content with overall picture
Now, recently - besides revising biasing mechanismus for SissySIT ( resulting in R.3) and few other amps, I also made FE called Plethora of Pinjatas ( or just Plethora, short) and found interesting to combine it in sitting Babelfish XA25 project
Plethora Fe having both SE and Bal inputs as matter of choice, called to adding another "2" in name , so result is Babelfish XA252
Plan is also to have iteration of DEF OS ( real SIT, no emulation in form of Schaded Mosfet), thus addition of "SIT" in name, so Babelfish XA252 / SIT
Find enclosed cumulative schematic, and will do edits of this post, if and when needed
OK1-OK2-TH1 .......... 10A limiting circuit, Savior of Our Souls, blatantly stolen from Pa 
 

a stiglo i ovo, tisuću komata
uspeo sam da upratim - 1K komada sam potrosio za nekih 26 meseci

Brojevi 1, 10, 11, 12 odlaze u domaćinsku kuću, kako ona to i zaslužuje.
Nakon toga, ostalo ih 8 (ljutih gusara).

Above is the crook and is wife.
Hello all I hope you are all well.
Some of you want information on my new and old products plus odd bits.
They can all be found here, you will need to sign on then feel free to download. Odd and new  all new Yes all new
Have fun be safe enjoy the music.