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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Oscillation issue DQ LP1's "upgraded" op amps posted by jk on June 17, 2016 at 07:50:58:
When I replaced the NE5532 in my Revox B226 with some LM4562, I really had to try different decoupling schemes before it sounded good. The B226 doesn't have ANY local decoupling on the opamps, so it was like starting from scratch... thank god there was some ground planes just next to them.
I ended up with 0,1uF MLCC from V- to ground, and another 0,1uF MLCC between V+ and V-.
A cap on each supply rail didn't seem to work as good in this case; experimentation with bigger EL caps paralled with the 0,1uF made the sound slow and flat and was immediately unsoldered.
I don't know about OPA2601, perhaps it's less fussy, but I'm afraid "general ruel" doesn't really apply to all opamps...
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- RE: Oscillation issue DQ LP1's "upgraded" op amps - KanedaK 04:34:11 06/19/16 (0)
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