indikator
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will OPUS benefit from clock upgrade? any guide how to use external clock?
Originally Posted by luvdunhill /img/forum/go_quote.gif I have a quick question for a usage of the SPDIF receiver. Theoretical setup would be as follows: |
1) Can the Ballsie module do the job of all these rather old op-amps and avoid the use of the stock output capacitor and resistor? (this with the added benefit of having its own LCBPS supply and transformer, therefore avoiding the Denon switching mode PSU in the critical analogue stage). For each channel, two of the four sections of the LME4974 quad op-amp (IC1) do the balanced to s.e. conversion and one section of the dual LM4562 (IC2) filters and buffers the signal and drives directly the RCA outs and the interconnect cable attached to it. Can the Ballsie drive directly the interconnects? Is the LM4562 output stage up to this task, without the need of an additional buffer? 2) If this use is possible, how is the Ballsie wired at its input? For each channel, the BB1791 DAC has a 3-leg out but the Ballsie has a 5-pin input. 3) How does the Ballsie deal with the possible DC offset from the DAC? Does it rely on a DC-free input signal (I think the other Twisted Pear DAC modules have their own output caps)? Can I safely connect the RCA sockets to the Ballsie output, without any series cap? Is it needed a DC offset protection circuit (like the diy AMB Epsilon module)? |
Originally Posted by indikator /img/forum/go_quote.gif will OPUS benefit from clock upgrade? any guide how to use external clock? |
Originally Posted by johnsonad /img/forum/go_quote.gif Well my 8 month project is finally finished and the Opus is up and running. Here are a couple of picks. |
Originally Posted by Russ White /img/forum/go_quote.gif very nice work! You should be proud. I hope you enjoy it. Cheers! Russ |
Originally Posted by johnsonad /img/forum/go_quote.gif Well my 8 month project is finally finished and the Opus is up and running. |
I wonder, what is that white thing near the transformer? |
Originally Posted by johnsonad /img/forum/go_quote.gif Well my 8 month project is finally finished and the Opus is up and running. Thanks to Nebby for getting me off of my rear and teaching me how easy it is to solder the boards together. The rear case work was surprisingly difficult at least cutting the holes and found out the hard way that I didn't have the right tools. Someday I will have cleaner cuts on the rear panel but for now it will do. I replaced the stock caps with BGs and they are most definitely bright. Here are a couple of pics. |