Iron Pre

[Zen Mod]

yup

 

deal i jeste da ga menjas za Iron Pumpkin .......

[Woland]

odličan deal [emoji106] [emoji1]

[Woland]

još nekoliko noći spavam pa..

Leonardo [emoji106]

[Zen Mod]

verzije SE i Bal za DiyA Store (pot-JFet buffer- Jensen autotrafo)

sledi doterivanje nomenklature i pratece dokumentacije

[ninja]

Je li sada sve gotovo? 

[Zen Mod]

procitaj prethodni post again ...........

"moja" nameravana verzija (selektor - diamond buffer - AVC) jos nije gotova

elektronicki deo je gotov (shunt , diamond buffer) i to svira kod Wolija

uskoro pocinje razvoj AVC-ova , i SE i Bal

ako sve bude OK , da se nesto poradi do NG

[ninja]

Ok,  penjem se opet gore na ceku

[Zen Mod]

seme podsklopova  za SE (Diyaudio Store iteracija)  , skoro gotovo

jos provera nomenklature

without names and values , da se smanji eventualni zbunj kasnije

[ZZZ]

dobro da si se konacno setio da uradis nesto za diy store... da ne lajem dalje...

bas pre neki dan sam ubacio Cap multiplier sklop naposletku napajanja za riaa preamp. Probao vise verzija samo BC550 onda bc i bd135 u darlington spoju i na kraju samo BC517 manji darlington tranzistor. Bolje radi sa tim. i smanjio se dodatno nivo bruma za par decibela. Mislim da je to dobra stvar i za izmedju regulatora. i posle regulatora. Sasvim se izgubi shum.

[Zen Mod]

ma nema suma , posle onakvog shunt-a

no , od viska glava ne boli ........ tj , to mu ovde dodje kompromis , da bi se koristio jedan shunt za stereo ..... da bi sve stalo na jedan pcb

[Zen Mod]

set fajli za SE iteraciju za Diyaudio Store gotov i poslat

screenshots i seme objavljene , pa i ovde

 

[Zen Mod]

preliminarne fajle Bal verzije objavljene na Big Diya , pa i ovde 

sledi samo jos provera nomenklature

Quote

yup

just a reminder (wrote that several times , also posted preliminary files simply to allow mellow grasping of things to come ) :

SE bard is stereo , one Jensen per channel ,connected as autoformer with 6db gain, logically;

Bal board is mono , one Jensen per channel ;
when used as converter - SE in/Bal out , gain is 6db overal (1V/V per phase ) , through balanced autoformer ;

when working in native mode Bal in/Bal out , having 6db gain overall , it's working as differential autoformer ,completely incidentally having SUSY* virtues

didn't tried/considered third mode - Bal in/SE out , but that's really trivial .......

*Tnx to Papa

 

[aaa zmaju!]

On 10.11.2016. at 7:50 PM, Zen Mod said:

jos provera nomenklature

 

23 minutes ago, Zen Mod said:

sledi samo jos provera nomenklature

 

[Zen Mod]

pa , za SE je bilo (provera nomenklature) , pa zavrseno

 

sad to isto za Bal

[Zen Mod]

Quote

say that you need 2 inputs RCA , 3 inputs XLR:

-input 1 to RCA (relay K1) - short pins XLR1.1 and XLR1.3 ,mount and solder D21
-input 2 to RCA (relay K2) - short pins XLR2.1 and XLR2.3 ,mount and solder D22

when going to SE/Bal modus (selected either input 1 or input 2), this happens :

through D21 (D22) , both K6 and K7 are energized ; K6 being directly(no RC) connected , it will switch immediately (K6 section 1 and K6 section 2) , moving + buffer output to top** of positive dedicated winding of Jensen ;

in same time , same buffer output is still connected to mid point of positive dedicated winding of Jensen through K7 section 1, so upper part of same winding is effectively shorted for tiny amount of time ...... and , part of second later (when RC deliver) same K7s1 will release mid point from buffer's output

with same delay/same time as K7s1 - it'll release connection between negative buffer's output from belonging xformer winding (through K7s2) , thus avoiding now Dodo buffer(without modullation) to brake/pull to mud it's own winding ...... in same being modulated from positive winding ........

**- that way buffer modulating entire positive winding directly (gain 1V/V per phase ) , but also adjacent (negative) winding ...... doubling phases , so overall gain is 1: (1+1) [V/V] , so 6db overall

entire delay game is to avoid crackling sounds (remember - we are dealing with inductive thingies here) , when dealing with phase/gain switching

simply - I'm making make-before-brake action relays from normally brake-before-make ones ......

 

[Zen Mod]

Quote

NB that , when going in Bal , taking SE out (either pins 1(gnd) and 2 (hot) as normal/positive , or pins 1 (gnd) and 3 (hot) as negative phase) , we still have SUSY functioning .......

pretty clever ...... but I can't take any bloody credit for that ......... approach being explored and exploited from dawn of telephone era

dunno , need to check Pupin's patents** .......

edit: conclusion :

same as falling Apple (eating thingie , not brand) predates Newton , it's evident that SUSY predates Papa .........

further conclusion - Buddha is everywhere .......

**or any other , regarding xformer matrix-es

 

[Zen Mod]

Quote

oldest , I can find quickly , at least moderately related , is Blumlein - GB394325A

 

[Impuls]

Zene nemam pojma sta si postovao u ova poslednja tri posta, nisam stigao do tog stadiuma u ucenju srpskog...

Zasto si izvore koji nisu aktivni spojio na masu?! Mozda ja imam izvor sa pozamasnom snagom na izlazu da moze da tera slusalice i sa ovim selektorom ga spajam na masu

[ZZZ]

Da. Mada izvori uglavnom, ali ne i svi, imaju oko 100oma serijski na izlazu tako da ako dodje do kratkog spoja prem masi to je istvari otereceno sa 100oma ili koja je vec vrednost... Ja na tim pozicijama postavljam optertecenje isto kao i vrednost pota, tako da pri prebacivanju izvor ne menja opterecenje.

[vladd]

8 hours ago, Zen Mod said:

dunno , need to check Pupin's patents** .......

Better check Campbell's works on loading coil, for knowledge  

In those years, patents is popular way for producing money and glory...

[Zflazar]

...greška gospođo...

 

[Zen Mod]

idemo dalje ....