Zen Mod

ima Mou, digi nabavljas jal preko sprinta ili vremenoplova ene, manja iteracija ovoga sa railovima nazivno 24V i IRFP mosfetima ce bude uskoro manja snaga ali i manja disipacija i svi delovi tepsija ribe izoblicenja isto smrt malecka, THD Spectra ista - dominantan 2nd, amp ne obrce fazu, harmonik negativna faza radni i finalni naziv ampa - Plethora of Pinjatas

nista od Wolija on prelazi na D klasu kaze, ovo mu previse greje dnevni boravci

Graphs , 4R load, BFR=510R everything same as previous, load changed to 4R

Graphs , 8R load, BFR=510R Everything the same, but BFR changed to 510R, that being opposite extreme to 22R - practically lowest OLG which I considered

Graphs , 4R load, BFR=22R everything the same, load 4R

Graphs , 8R load, BFR=22R FE is made as more or less basic LTP thingy; though, I did wanted to have possibility of altering THD level by changing OLG in simple and predictable way - which I made in also basic way - tearing LTP halves ( each halve having own CCS) and introducing common degeneration resistor ( practically changing length of effective Tail of LTP) , which I then named as Beauty Factor Resistor, short BFR as you will see, changing value of that resistor is chhanging OLG, thus changing amount of overall NFB, and as result we have lesser or higher THD level Luckily, Spectra is not changing, and that was a goal now - set of measurements with highest possible OLG - BFR s 22R Rails are 30Vdc ( amp projected to work with rails of 30-35Vdc with no changes) Iq 1A7 DC offset and Iq practically not changing in temperature domain While varying mains voltage (nominal 230Vac) between 200Vac and 255Vac - DC offset is changing some 20mV, while Iq is practically not changing Good enough for me Load for these graphs is 8R; each graph is having title captured, so you can see what/how much due to 30Vdc rails, clipping smidge above 40W with 35Vdc rails, clip near 55W who needs that ?

I did planned before to make it, but finally made T-Bed 2 , as proper cradle for prototyping this from one of pics, you can clearly see that ZM is Chicken , executing first power up and settings with IRFP240/9140 and 2A fuses in rails...... did it with smallish Iq, and later - when I was happy camper, changed to Biguns

Now, for clarity sake, there is edited schm, parts needed for SIT iteration omitted few more funny pics, too

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

eh kuj trazi taj i nadje naleteo na KP, Garant - 15E ce ga prestelujemo za M4 i dosta moment opreme usput uzeo za 1K i zuti kompletak, da se nadje sto rece Edi Marfi - kad sam bio mali, morao sam da prdim u kadi, to have this

nema potrebe samo sebe stavim na zabranu citanja (foruma) 5 dana i eto lepote

lako vam je mene zaebavati

ma ovo super ladno pojacalo vako kako je , smali mosfeti, 1A1 Iq - dissipacija 66W/ch a klip na 40W/8R sutra pucks na mesto

Fetishista

da ne bude da samo shonne radi nesto

sudeci po muzici i javnoj personi, Aca je Car idivididedu sam slusao sa ćerom (snimak) i plakali smo od zabave ....... msm smesno i ozbiljno

ignorisi sve sto sam napisao gore rano jutro, pre prve kafe, sve sam pogresno/kontra shvatio sad razmisljam , kako sam to uspeo da procitam da shvatim da je ideja da se napravi dummy load od samih ispravljacica

prvo mi pada na pamet da bi rezultujuca otpornost bila previse nelinearna u strujnom domenu ...... mada nisam siguran - nikad se ozbiljno nisam bavio zivinim ispravljacicama i pratio parametre ...... sto bi meni znacilo ukljucenje mozga da pratim previse velicina u isto vreme ampermetar i voltmetar kao obavezan deo skalamerije msm, probaj ...... bez probe nema nauke