Zen Mod Napisano April 27, 2021 Share #1 Napisano April 27, 2021 Yup, improved iteration of previously made Babelfish M25 Who remembers - 'twas bstrdzd FW M2 with implementation of XA25 main trick - Square Law arrangement of OS mosfets, in simpler words - mosfets in OS put to work without source resistors Result - looooow THD of OS, but main difference being broader A Class envelope , most prominent in context of 4R load - where regular M2 is KlunK!ing around 12-13W, while B. M25 doing the same around 40W ...... rest to max being KlunK! This pcb made for easy implementation of Schade arrangement for one OS mosfet, arbitrary chosen to do that with lower one, even if that is making some problems with choice of small mosfet for source follower/level shifter ....... I need one with lower Ugs treshold ( it adds to Schaded mosfet Igs) , and P channel small mosfets with that are scarce, somewhat Anyway, find enclosed both schmtcs, full one ( all parts on pcb populated) for SET (Schade Enhanced Thingie) and second - few parts omitted - for Babelfish M25 R.2 note - slight tweaks of THD Spectra, for one's Golden Ears, possible with change of output mosfets - down one can use either IRFP9140 or 9240, up can go IRFP240 or 150 about that later reminder - extensive ( if crude) explanation of biasing mechanismus posted in LuDEF thread , posts #32-#37, LuDEF Today - all files for Babelfish M25 R.2 ; anyway - read captions - each file is properly named and have caption Mentok and sp300b je reagovao/la na ovo 2 Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 27, 2021 Autor Share #2 Napisano April 27, 2021 some pcb porn Mentok and dejanco32 je reagovao/la na ovo 2 Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 27, 2021 Autor Share #3 Napisano April 27, 2021 measurements , 8R Load rails +/-24Vdc, Iq 1A5 Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 27, 2021 Autor Share #4 Napisano April 27, 2021 same settings, 4R Load Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 27, 2021 Autor Share #5 Napisano April 27, 2021 mess porn dejanco32, 2a3 and Vix je reagovao/la na ovo 1 2 Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 27, 2021 Autor Share #6 Napisano April 27, 2021 How it sounds? Bloody, Jolly good - as your regular M2 ....... Berserked on eeeny speakers ( not demanding anything from amp) - maybe just little cleaner; if you have speakers, you not even thinking being adequate for 25W A Class amp, this is A Class amp to change your thinking Have few ( of previous incarnation - Hall chips in biasing mech.) driving Dynaudio Contours, one is driving Guy tall Triangles with trio of 8" woofers per side Hope tomorrow to post same files for SET amp observe that I implemented 2 veeeery secret tricks, how to make amp muchmuch better than schm itself is promissing - I've put one strategically placed Blue LED (Papa's trick) and Cinemags put to sing are my Uncle Bubba Bob's .... so World is my Oyster _MM_ je reagovao/la na ovo 1 Link to comment Podeli na ovim sajtovima More sharing options...
Mikorist Napisano April 27, 2021 Share #7 Napisano April 27, 2021 Mere unimeri Link to comment Podeli na ovim sajtovima More sharing options...
zerowaf Napisano April 27, 2021 Share #8 Napisano April 27, 2021 Oš kasti, da spojim na njega poklopac od limene kante za smeće da bi i to prosviralo? Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 27, 2021 Autor Share #9 Napisano April 27, 2021 10 minutes ago, Mikorist said: Mere unimeri nista ja ne merim, samo na uvce se podesava 1 minute ago, zerowaf said: Oš kasti, da spojim na njega poklopac od limene kante za smeće da bi i to prosviralo? yup! Link to comment Podeli na ovim sajtovima More sharing options...
zerowaf Napisano April 27, 2021 Share #10 Napisano April 27, 2021 pre 1 minut, Zen Mod reče yup K vragu...gdje sad da nadjem dobre dvije kante za smeće.... Link to comment Podeli na ovim sajtovima More sharing options...
_MM_ Napisano April 27, 2021 Share #11 Napisano April 27, 2021 Sviđa mi se se ovo što može da pokrene sve, ovo je amp za moje male kutije od 89db.... 😄 Link to comment Podeli na ovim sajtovima More sharing options...
krca44 Napisano April 27, 2021 Share #12 Napisano April 27, 2021 Jednu Alu tablu 2mm x metar x metar na zid i pcb na njoj - umesto slike imas "modernu" na zidu... a svira Leonardo and zerowaf je reagovao/la na ovo 1 1 Link to comment Podeli na ovim sajtovima More sharing options...
Leonardo Napisano April 27, 2021 Share #13 Napisano April 27, 2021 ^ Sheet Metal Amp krca44 je reagovao/la na ovo 1 Link to comment Podeli na ovim sajtovima More sharing options...
Mentok Napisano April 27, 2021 Share #14 Napisano April 27, 2021 THD 0.36 na 50w na 4 oma Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 27, 2021 Autor Share #15 Napisano April 27, 2021 yup, seti se - bez overall NFB Link to comment Podeli na ovim sajtovima More sharing options...
Mentok Napisano April 27, 2021 Share #16 Napisano April 27, 2021 lepo što je sve na istoj bazi pa uz malo pažljivog planiranja pre izrade moglo bi se čak napraviti i svičabilno između M25 i SET uz naravno ponovno biasovanje čak kad se ima slobodnih par sati može da se prepravi u Old Soul ili Sissy, uz malo više vratolomija i u LuDEF lepo, lepo Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 28, 2021 Autor Share #17 Napisano April 28, 2021 -Honey, I Shrunk the Kids! ...... no, wrong movie..... -Honey, I Shrunk the SITs! .....no, there is no such movie.... -Honey, I created a Monster! .....no, there is no such movie.... -Honey, I am The Monster! ...that's the movie which must exist! Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 28, 2021 Autor Share #18 Napisano April 28, 2021 name of the game was to create SIT amp for Greedy Boyz Hordes ...... naah, I don't care for Hordes, I have all the fun logical thing would be to put emulated SIT in same position as in DEFiSIT/SissySIT, which is positive rail; from some reasons I tried in simulations to put it down (lower rail), then realized that that approach is resulting in difficulties - choice of small P channel mosfets for Source follower/level shifter, having low threshold Ugs is much smaller than counterparts in N polarity however, me being stubborn as I am, stayed with P channel ....... SF Ugs is important, beacuse it is additive to feed point of Schaded mosfet, which in this case we have as -3V8 (ref to output) , then Ugs of TP2640, so resulting biasing voltage at TP2640 gate is around -5V4, ref to output in same time , Ugs of upper mosfet is +4V42, which means that resistances from rails to adjacent gates are still pretty symmetrical one of interesting things - of all lately seen amps, only this one is having same current distribution of output parts as real DEFiSIT is having - up to clipping point of more active part, parts are working in antiphase , fighting each other..... and only at and after clipping, lesser acting part ( one with lesser xconductance) is helping other one see attached - graph from sim, but confirmed in vivo....... though, easier to post this than capturing scope screen ..... counting on fact that I have a scope from Lee De Forest time, but before triode invention sim shown from output sine of around 20Vpp @ 8R load biggest sine - upper mosfet current smaller sine - current through load smallest sine - Schaded mosfet current Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 28, 2021 Autor Share #19 Napisano April 28, 2021 THD measurements +/-24Vdc rails, Iq 1A5 , 8R Load Link to comment Podeli na ovim sajtovima More sharing options...
Srecko Napisano April 28, 2021 Share #20 Napisano April 28, 2021 Nema ga Woli da se oglasi?[emoji16]Jel vreme za njega?[emoji16] Link to comment Podeli na ovim sajtovima More sharing options...
Zen Mod Napisano April 28, 2021 Autor Share #21 Napisano April 28, 2021 same settings, 4R Load Aleks and shonne je reagovao/la na ovo 2 Link to comment Podeli na ovim sajtovima More sharing options...
Aleks Napisano April 28, 2021 Share #22 Napisano April 28, 2021 Ovo kao kad izlaze apdejti za Windows, malo malo izlazi nova verzija Babela, M25, Sissy... Link to comment Podeli na ovim sajtovima More sharing options...
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