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Old 21st June 2013, 08:49 PM   #1
dnic77 is offline dnic77  United Kingdom
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Default gainclone distortion with playstation

Hi all, I've done the PlayStation mods on the output stage and when I've plugged it into the gainclone I'm getting bad distortion. It was fine before the mods and still sounds good when used with other sources. The PlayStation works good with my av amp so its getting me confused to what the problem is. The gainclone is the chip amp kit with a 50k pot and the mods on the PlayStation are from the dog breath page. Any help is appreciated.
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Old 22nd June 2013, 01:39 PM   #2
dnic77 is offline dnic77  United Kingdom
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i have put a 0.1ohm resistor on the output capacitor in the ps1 and it sounds a lot better.
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Old 22nd June 2013, 01:46 PM   #3
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What sort of mods? Where did you place the 1/10th Ohm resistor?
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Old 22nd June 2013, 01:56 PM   #4
dnic77 is offline dnic77  United Kingdom
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hi harley, the mods where taking from here Mick Feuerbacher Audio Projects . the resistor is on the capacitor ( between cap and cable) . there is no resistor to + and gnd as i tried different values and even tried no resistors and all were distorted.
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Old 22nd June 2013, 02:44 PM   #5
dnic77 is offline dnic77  United Kingdom
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the 0.1 resistor has has taking a lot of the distortion away but its still there. not sure what else to do now. i followed chipamp.coms instructions for the lm3886 kit and there is a 50k alps blue pot in. i followed dogbreaths instructions for the ps1. but there not compatible with each other. is it the 50k pot?
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Old 22nd June 2013, 03:20 PM   #6
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All the circuit does in increase the audio level by 3db, nothing else. The impedances make little difference. So, in my mind nothing more than a pre amp.
Maybe there is now too much signal causing the system to overload.
Vt2 is the mute control device for Q302 and Q404, muting transistors.
The original DAC is excellent and to "mod" like this is not an advantage.
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