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SL-1200 MK2 loop filter mod?

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SL-1200 MK2 loop filter mod?

Postby Trackside » 08 May 2012 21:23

A 33k resistor and 470nF cap in // with the cap nearest the lower right edge of the board according to SoundHi-fi is a worthwhile sonic improvement as it removes some low frequency oscillation. I just fitted it and am not sure I can hear any difference yet but the platter certainly takes longer to return to speed if you slow it with your finger.
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Re: SL-1200 MK2 loop filter mod?

Postby Trackside » 09 May 2012 09:32

I've removed it as the pitch stability was clearly worse.
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Re: SL-1200 MK2 loop filter mod?

Postby russtafarian » 09 May 2012 18:13

Thanks for the feedback. I was going to ask you for your source so I could study up on the circuit before trying this. This may require a scope to properly tune the circuit.
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