Zen Mod

that's it , practically , for today tomorrow , I hope - same tests with 2+2 2SK2145BL in LTP , LTP current programmed to 5mA per tiny (20mA overall) , so it'll be nice and cozy 50mW for each will up a little current through EF , to be closer to 20mA than 15mA ........ after that will most probably leave 2SK2145BL in situ ( not crazy enough to remove them ) and try same battery of test with SJEP120R100whatever in lower output position .... will leave mighty IRFP150 in position of upper one ( mu or what-follower) , can't see what Semisouth could do better in same role .... ZM , Happy Camper this evening edit: Shade game not promptly ; first need to evaluate this one in long term listening test , to be able to value Shade after ..... I know it'll measure worse , but it could happen that my ears are happier with worse after all , I'm listening regularly one of crappiest amps by measurements and enjoying immensely

so , set of measurements at 4R load , same Iq and rails as for previous test btw. I decided that clipping is at 1% THD , and that's exactly at 21W9 ...... though - it was tricky to set level pot to exact value (THD rising rapidly at that level!!) pretty good , if you ask Mighty Moi

power-on and power-off behavior is same polite and nice and gorgeous as ZM Might itself , so there is no any surprise now some measurements ....... being lazy and impatient , I didn't use recently acquired Quantasylum ( older , SE one ) but my old funny interface box and EMU1212 in PC , software is ARTA Iq set at 1A8 , rails more or less exactly 25Vdc first set of measurements at 8R load ; each graph is titled at bottom ; as always with my T-Bed and test setup - ignore everything left of 1K ...... plastic box for interface , old and crummy PSU incorporated in T-Bed blahblah

then yesterday and today I put it in T-Bed , and did some final tweaking of some values for start , they're equipped with 1+1 Toshiba 2SK170BL in FE , Iq set at 10mA (5mA per tiny) and pair of goodoldsturdy IRFP150 are in OS

few days ago , I received 0 series pcbs , and did some stuffing

while we at Eagle files , two more

Babelfish ᄅſ Seeing some stones turned lately , I simply couldn't resist Babelfishing urge...... Though , as I already did some mild Babelfishing of our dear and beloved J2 , logically that this time I needed to do something ...... completely different due to constant demand and popularity mainly on Far and less Far East , schematic of original FW J2 is still generally unknown or - better said - none of circulating DIY schematics weren't blessed by Mighty Pa (pleonasm here , Pa is Mighty by 42) few things we all know , and these few things are good and plenty enough for basic postulates of variation of Jazz Standard Basic premises : 1. possibility of incorporating less critical ( for acquire) JFets for input LTP, by choice and must possible use of 1+1 , or 2+2 in same ; 2. possibility of incorporating various output devices , of lesser and bigger rarity and/or price 2a. possibility to avoid tearfully matched parts (outputs and other ) , while still easy settable both output offset and OS Iq in broad range of values I got it all ........ how: 1.easy peasy - use N channel JFets (choice is waste!) , lead them (currents) back to lower output gate via simple and effective current mirror ..... put few cascodes here and there to pet both JFets and fine CM parts (tiny JFets are always grateful for that, but high beta small BJTs like that too) ....... and while we are there - why not using fine emiter follower between CM final end and lower output's gate ....... 2. OK - trimpot in front of lower output's gate is trivial ; second part is feeding Optocoupler with CCS , with some current spare , and routing the same in loop around ( in parallel practically) said optocoupler , so we can set Iq of upper mosfet with ease and in broad range 2a.partly already covered above , just to add that output devices can be plain old IRFP150 , same as any boutique part you already have , value of Ugs is irrelevant - easily covered with change of ,say, two resistors 'nuff talking , time for schm (read notes on left side):

nazovi i izdiktiraj tu prostoprosirenu recenicu ako te pita da li je napon pod opterecenjem , ti reci bas me briga , naravno da jeste

0.16% na punoj snazi od 25W/8R

20W , staticki i magnetni oklop 38V sa srednjim izvodom licnasti izvodi i primar i sekundar , duzine 20cm , primar naspram sekundara sa tim tvojim opterecenjem sekundarni napon ce biti i visi , i racunao sam sa tim , pokriven si sve situacije - i -15% u mrezi ako se desi

msm , stvarno .......

ko je ista rekao o kupovini novoga ? DIY , naravski .......

pa ima - T-Bed , napravljen za to a na gomili (treba sastavljati al ce kad bude moranje) sve za jos jedan T-Bed , da se ima a onda ce morati da se sastavi demo primerak ......

bolje Cornwall IV ili jos bolje Klipschhorn ili jos bolje Jubilee

ima sve EMU1212 od pre a stigao i Quantasylum mozda sutra i prosvira , why not ........ mada sumnjam da cu imati kad da merim

il ce bude slavni propadaus , il ce bude zanimljiv projektic

pa lepa ograda .....

ma maleno je to , ko japanski kanister od 20L

ja ne znam sve ali ima ko zna ako je drugacije od ovoga , onda se neko igrao imzenjera https://www.rane.com/note110.html

ozdo bolan , samo ce ti se kaze kad dobijes pcbs , jedna fotka od mene ce ti bude dosta obicna lemilica i tinol 0.5 sve radi