PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*

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The links to the files on the first pages seems to be not working anymore. Would somebody have them still lying around perhaps? Would very thankful :) Have one prr not working that I built about 10 years ago and can't remember really much of this project....


Edit: Got it from the previous page!
 
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I've got a rev 2 version working and am converting to stepped switches. Can anyone help with deciphering the connecting of 2 pole 5 position switches on the attack and release controls? I'm assuming it's for different stereo link modes. Where would the "option in 2" connections be made from the schematic?
I have it working by ignoring the second switch connections. I am however getting oscillation on the left channel, ONLY when using 1731 opamps on the output, with the output volume higher than the 7th position on the output switch. It works fine with 5532 chips though. Anyone else have any thoughts here?
 

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  • PRR-176 att rel switch.png
    PRR-176 att rel switch.png
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