Your the one who advised him without technical knowledge to throw a small fortune in Jupiter, Deulund or Mundorf capacitors into it, without even knowing the circuit parameters of this unit if they can work with it or not. Please tell the owner and myself, exactly in what position in the circuit these Jupiter, Deulund or Mundorf caps should go and which caps they are to subsitute, and what value in uF and V they should be?? Cheers George |
When techs talks about caps getting old/tired and drying out this is directed at Electrolytic Caps. What you replaced was a coupling cap if you used a Mundorf not an electrolytic. From memory this JVC is direct coupled with dc servo's, ergo no coupling caps. Now lets get back on the OP's subject and stop hijacking his thread. Cheers George |
Like I said if he has no problems and it running fine, no noises from it's output, leave the caps be. If he really want to make it sing beyond his wildest dreams with a mod, then do the mod I linked to. And then while the board is out do the caps if he's worried, as it's a pain to get the board out of one of these just to do a cap change and nothing else and maybe for nothing if it's working fine. Cheers George |
11-17-15: Doug99 Doug, if it's working fine, and you want to do a real great mod. It has great R2R Multibit PCM56 dac chips in it, and will benefit greatly with a new I/V and buffer stages after the dac's. Get a tech that's good, and replace them with a 3 stack of this zero feedback I/V and buffer, I show how to do it, and it will sing after this mod. http://www.diyaudio.com/forums/digital-source/227677-using-ad844-i-v.html It should take a tech around 1-2hrs and the parts will be around $30. Forget doing caps/spikes and such if it's working fine, as these will do nothing at all. Cheers George |
There are disadvantages to having a separate dac/transport. One is the obvious, in having to have a digital interconnect between the two, which itself is never perfect. The other one that not many know of is there are two clocks, one in the transport and one in the dac, and they are not sync'd to each other. In a stand alone CD player there is one clock that serves both transport and dac section so they are sync'd together. This is why Cambridge in their original Reference 1 Transport/Dac pair, had an extra interconnect between dac and transport to slave the transport which didn't have a clock, to their dac. Also why Tent Labs made a very expensive mod board you could buy to put in your dac to get the clock timing signal out to the transport with another interconnect that you had to take the clock out of so it was then it would be slaved to the dac. The advantage to having separate transport and dac, is that you can change the dac when you want a change in sound, and you can have multiple sources/transports if your dac has multiple inputs. There is no sound advantage. Cheers George |
