I suspect the DEM. What circuit are you using on pins 16 and 17 ?
I believe indeed there is a temperature effect on the DEM oscillator, so the DEM-lock might be lost with varying temperatures.
http://www.google.com/url?sa=t&rct=...Hl2tf9E8Q&sig2=I1zWuu2jzVEpItjXOWX6VA&cad=rja
I believe indeed there is a temperature effect on the DEM oscillator, so the DEM-lock might be lost with varying temperatures.
http://www.google.com/url?sa=t&rct=...Hl2tf9E8Q&sig2=I1zWuu2jzVEpItjXOWX6VA&cad=rja
I am using the Grundig cd9009 circuit. I suspected I had a bad solder joint. I re-flowed solder to all joints but the problem persisted. Replaced the decoupling caps and problem has vanished.
Subsequently I have corrected some original issues. I was running the 9009 DEM by taking clock from WS. I drive the DAC with a WaveIO XMOS USB I2S source. WS at 44.1, (while much better than the stock configuration with the 760pf cap) is much too low for DEM. I have available from the WaveIO a clean 176.4 signal. I now use that signal to drive the DEM circuit. The fresh decoupling caps plus the optimized DEM clock is producing a wonderful result. Level of detail on a quiet background is quite stunning. Again one of those moments where you need to go back and listen to the library with fresh ears.
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