Gramofoni, ručice i tako to me ne interesiraju poodavno, ali pozdravljam napore domaćih konstruktora da načine nešto posebno. U današnje vreme nikako ne ide bavljenje masovnom proizvodnjom jeftinih stvari, tu su Kinezi i ostatak Azije zaklali ostatak sveta jeftinom i brojnom radnom snagom, ali pojedinačni luksuzni proizvodi možda mogu doneti neki prihod ili makar neku slavu i bez velikih prihoda.
Uzeo sam od @Daudio tri razna koja je sam motao, samo da nađem vremena da razbucam DAC i da probam. Hteo sam i da ga prežičim usput sa VDH SCS samo treba naći vremena za sve te poduhvate. Pošto sam bio dugo odsutan iz firme, nakupilo se nekog posla.
Evo ga još jedan sa diyaudio sajta, i DDDAC 1794, ovog puta izbačeni su Cinemag 15/15.
Hi all, Ive been enjoying my 4-board DDDAC since 2017. Its time for me to do some tweaking (naturally by implementing quite a few updates to my system like adding a Rpi for streaming and using the FIFOpi reclocker.
However, my question is specifically on the analog output of the DDDAC. My original implementation was with the Cinemag 15/15 in to balanced XLR connections, driving my Hypex NC400 Power amp (volume controlled digitally before the DDDAC). Nice sound, but I tried removing the Cinemags all together and go direct to the amp (ie. pos and neg DDDAC terminals wired direct to the XLR connectors)..... wow it was much more dynamic and that is the implementation I have used for at least 2 years (the NC400 have a DC offset protection circuit). I am now looking to start using headphones more and so looking for the DDDAC to feed an amp specifically for headphones. My concern is whether running the DDDAC directly coupled to a new amp would kill the amp or my headphones. I have no idea how to identify whether an amp is DC coupled or what the various input impedances would mean in this implementation.
Do I need to go back to using transformers? Like the 600/600 or audio creative OPT? Just to be on the safe side? How would I know if a new amp would be ok running direct? Is there actually any sound benefit to use transformers rather than direct with no transformers or caps to my amp? Im not an expert in this so really dont know! Any help would be absolutely awesome!
U Birklinu, ne vidim gde piše da je posrebrena? Dunavkova ima 19 licni ova ima 7, nije ista žica.
https://www.ebay.com/itm/22-AWG-Silver-Plated-PTFE-Wire-Assortment-50-feet-19-strand-audio-amplifier-SPC/233850466411?hash=item367292f06b:g:xKQAAMXQMXRQ8JhP
Na ebay ne nađoh 24AWG a da nije Kineska. A i bolje je ožičiti sa 22AWG. I sigurnije mi je kad je made in USA za vojsku nego ove za civile.
Dunavkova je 22AWG (0,33mm2) sigurno, samo nije solid core pa je deblja. To je licnasta žica, koeficijent ispune je oko 0,67.
Licnasta 0,8mm x 0,8mm x Pi/4 x 0,67 = 0,33mm2
Puna 0,65mm x 0,65mm x Pi/4 = 0,33mm2
Možda bi trebalo prvo probati prebacivanje kabla za zvučnike na B izlazne kleme koji je verovatno bio nekorišćen svih ovih decenija.
Zatim bih proverio DC offset pojačala i mirnu struju. Potom releje na izlazu, prekidače A/B i štampu, da nisu vremenom izgoreli kontakti ili se pojavio neki prekid negde.
Onda sve ostalo redom.
Pojačalo je lepo, čista klasika.
To je teško ovako proceniti bez otvaranja i merenja a i dosta je staro pojačalo. Može biti svašta, loši kondenzatori, prekidi na štampi, izlazni releji DC zaštite, neki od aktivnih elemenata u pojačalu ili pretpojačalu, milion stvari tu ima. Mora u servis na žalost.