Site Owner/Administrator
Location: Wrexham, North Wales, UK
Posts: 110,403
I'm AudioAl'sArbiterForPISHANTO.
Hahaha...
Slightly off-topic but it reminds me of a wee joke...
A chav Scottish couple called Bobby and Betty are trying to mix it with the posh set are at a dinner party. The champagne's flowing and everything's going well. The hostess spotting that they're without nibbles passes them a tray of canapés and asks Betty in a snooty voice: "Cheesy dip?" to which Betty replies: "Naw, hen, he washed his cock this morning..."
Right, back to DACs...
Marco.
Main System
Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.
Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.
Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.
CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.
Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.
Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.
Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.
Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.
Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.
Circuit Junkie & DIY Room Forum Leader
Location: Notts UK
Posts: 1,804
Thats put me off Dairylea dunkers forever!
Nowt wrong with these odd off topic posts, it adds a bit of flavour to the discussion even if it does involve a bit of cheese
New Member
Posts: 11
Ground is ok, no shorts , only short to the 5 V , 20 M ohm to the Ground = evrything ok
I RESOLDERED every power connections
Good news the cirrus dac show a healthy** weird**1.7 V AC+DC , with some weird 0.4 V DCat output.... i think i am going to try it directly on my buffer ( bottle head foreplay ) then to the integrated tube amp...
...hope nothing blow up
It mesured around 0.1 V DC without any music playing at the output of the buffer same with music playing... ok...i hope... should be ok ... if you have a bottle head pre, never turn it down first it gives 20 V DC... you hear my speaker cry when i did that sometimes... they need mostly only 5 V to play at peak level!
result : just noise, ground problem, sound like a rca socket with defective ground, leo i anticipate your next post, change the kit sockets, lol ill try to tight them very hard and it should work, but i think even then it's not going to work . Anyone has a good dac to recommend me ?
Last edited by gabdx; 21-07-2008 at 23:31. Reason: XD
Member
Posts: 34
Not a great thought! Back on DACS I am interested on your thoughts as regard the PSU. How good/bad is the supply supply versus a decent diy job?Originally Posted by leo
Iain
New Member
Posts: 11
My dac looks worst and worst , before i rip evrything apart ill try to revert all the modifications...
Circuit Junkie & DIY Room Forum Leader
Location: Notts UK
Posts: 1,804
I never had the standard psu so can't comment on its quality, it certainly helps to use the best you can though, something with low impedance low noise is what I use for both analogue and digital regulation
Theres plenty of cheap diy designs about, its easy to go mad but obviously seems to defeat the object of this cheap diy project.
Could use something like a cap multiplier supplying a shunt set for 5v for the dac.
Adding a current regulator diode from the op-amps output to the supply pin with worst PSRR can add a nice improvement on the cheap, if you can't find a suitable CRD its easy to make one using a Jfet with a resistor through it to set the current, also add a resistor before the CRD to help with the capacitance
Circuit Junkie & DIY Room Forum Leader
Location: Notts UK
Posts: 1,804
I think its just been a bit of bad luck you've had, it makes sense removing the mods to see if the fault can be isolated
New Member
Posts: 11
I think it's completely out of usage , the cs itself seems dead, maybe i did a short some capacitor and it burned something inside... I tried evrything i could and nothing works.
Circuit Junkie & DIY Room Forum Leader
Location: Notts UK
Posts: 1,804
If the CS8416 receiver or the CS4397 dac chip has gone theres the option of replacing the chip if your confident
http://uk.farnell.com/1023396/semico...questid=484498
http://uk.farnell.com/1023451/semico...gic-cs8416-csz
Senior Member
Location: Surrey
Posts: 7,218
I'm Rob.
Got to be cheaper in real terms to buy another board.
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