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Old 3rd December 2012, 11:58 PM   #8751
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Salas. Am i correct in assuming that c3 is a coupling cap and can vary slightly from the 47nF listed in folded MC version.
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Old 4th December 2012, 05:59 AM   #8752
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C3 is a coupling cap but affects bass response and overall riaa precision, so you better try to match it also.
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Old 4th December 2012, 08:07 AM   #8753
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Up to 5% part is OK there.
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Old 4th December 2012, 08:11 AM   #8754
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I ask becaus eit appears you used an Obbligato Gold there and i habe not foun done in the spec'd 47nF value. I assumed this meant you may have bumped it up to 100nF as in earlier builds.
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Old 4th December 2012, 08:15 AM   #8755
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No, its 47nF as in the schematic. George had 4 or more used ones. Maybe they don't produce it in that value any more?
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Old 4th December 2012, 08:29 AM   #8756
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Thanks.
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Old 4th December 2012, 12:03 PM   #8757
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Buzz, look on eBay for item# 380420553068
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Old 4th December 2012, 12:09 PM   #8758
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appreciate the heads up. I am going to try a number of different caps. Ill add those to the list. although FT3 may be higher priority.
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Old 4th December 2012, 02:21 PM   #8759
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You can find obbligatos 0.1 and 0.047u here Obbligato capacitors (Cool supplier)

I used those as coupling caps but really prefer FT3..... Anyway Salas posted that small footprint is better so FT3 might not be the perfect solution here.
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Old 4th December 2012, 02:34 PM   #8760
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Obbli prove better than 5% that their spec is when put on the LCR as many other modern makes do. 2.5-3% average I would say. We just used decent parts that they were around for a test, nothing too fancy. Also the same output capacitors from the other one beyond same general config and PSUs. So not to stray too much. Sometime in the near future vgeorge is to rearrange his other build that has some Z Foils and Teflons in the Riaa filter so to see if he can attain some more icing on the cake so to say.
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