Zen Mod

tko leti vrijeditko vrijedi letitko ne vrijedi , ne leti:tongue10:

Seventh edition ?

slusno ili merenjem ?

ok everything having on mind that Ugs of outout is in range of 1V3-1V4 output jfets desoldered both inputs tied to gnd output also tied to gnd R12 to zero , same as R25 now - power up just to have all leds lit , and up a little to - say +/-15V to max +/-16V set R9 to have 9V4 across it now - if all input jfets are ok , and BC are ok you'll have around 23mV across each of R5 , R6 , R7 and R8 across R35 you must have 10mAx220R= 2V2 ; because you have lowish Ugs comparing to mine Jfet outputs - you can decrease R35 to 180R , so you'll have broader range for setting R12 later ; in that case you'll measure 1V8 across R35 now - if you still have 0V across R23 ( and you'll always have around 0V65 across it , doesn't matter which value of R23 is - it's best to replace both Q7 and Q8 if you have 0V65 across R23 ....... taking in account that you place 60,4R there ( in previous schm maybe there was 68R , but 60,4R certainly wasn't ) , current throughthat CCS will be Vbe/R23= 0V65/60,4=10,7mA , which will make around 4V2 across R26 ; optocoupler is dead now - without current going through 3W source resistors , so LED isn't lit . it's best to change that optocoupler - who knows what you does ........ OK - let me know what you measure that way ....... and I'll see that in some 8-9 hours buona notte

ok - now I'll type how to test rest of circ without outputs after that , I must go to sleep ..... early morning is Philip Island ......so - wait a little

did you test output jfets in bad channel ?

Valjevcan bese na KP sa tim oglasima

ovom prilikom se javno izvinjavam Sipiju ,zarad neukusne i neprimerene zajebancije. necem se vise zajebavam s necim sto je rezultat truda , rada i znanja .

is that "proper " channel making sound ?

svrbi svrbi ......:rofl:a ja ti lepo rekao da se strpis ....

a jok - ja sam se tad bavio biciklovima ........ heftalicu ne mo's zajases

did you fired it up according to post http://www.diyaudio.rs/topic/1765-semisouth-power-jfets-fw-j2/page__view__findpost__p__51840 ?anyway - we can test it easy ;for easy testing , it's best to have outout jfets connected to pcbs with short wiresfirst step - unsolder both output jfets from pcb , and let me know what's Ugs for lower and same for upperthen I'll calc and tell you on which values you need to set every trimpotthen we'll test just front end and few other pieces - without output jfets in circuit

ete ga on opet - ozbiljan ....... .

kol'ko ta slicka kosta ?

samo ti karaj ...... evidentno da ti ni naocare ne pomazu , pa moras da biras drececi led , da vidis da li je uredjaj ukljucen:buehehe:

sunce ti poljubim - sa tim mora da se vrsilo prisluskivanje bar tri telefonska pretplatnika !

to sto Sipi nacrta nije ni za ***** ;da upotrebi zeleni led ...... to bi vec bilo nesto ........

a sto drugo do home entert ....... mada - lako ce se i digi preradi da pusti dalje ........

vrati joj istom merom - budi naivan kao Numerobis

what's offset on output now - I see 20V ( yikes ! ) on right pic , but what's on left pic ?and - do you have variac ?

javi se kad budes radio upgradene zurim nigde

a nekol'ko manje .....

:angry27:ne valja to nista ......pitajte ga sta jos ima po policama ....... sto ne sme zeni ni da prijavi bice posle : " Boze , zeno ..... ja sam to nabavio jos pre nego sto smo se upoznali ! "meni je moja jednom rekla : " ti si evidentno imao 90 godina pre nego si mene upoznao ........ "