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filter 2069D 4018 12db / 24db mod

filter 2069D 4018 12db / 24db mod

2016-06-11 by neil.macneil@...

Hey guys,

I have a p800 mk1, my filter chip is a 2069D 4018 and not the 2069AD 5066 as shown in the modification photo in this group. I tried it out but it just gave me white noise. Did I miss something or does anyone know if it works with my chip model? I can't find a schematic.

-Neil

Re: [korgpolyex] filter 2069D 4018 12db / 24db mod

2016-06-11 by <backshall1@...>

It sounds like maybe you used pins 6 and 7 instead of 5 and 6, or maybe you used 5 and 6 but managed to short out 6 to 7, or something like that. Pin 7 is the noise generator output. If you are soldering directly to the pins on the chip, it would be easy to accidentally create a solder bridge from 6 to 7.
Don Backshall
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From: mailto:korgpolyex@yahoogroups.com 
Sent: Saturday, June 11, 2016 1:27 PM
To: korgpolyex@yahoogroups.com 
Subject: [korgpolyex] filter 2069D 4018 12db / 24db mod

  
Hey guys,

I have a p800 mk1, my filter chip is a 2069D 4018 and not the 2069AD 5066 as shown in the modification photo in this group.  I tried it out but it just gave me white noise.  Did I miss something or does anyone know if it works with my chip model?  I can't find a schematic.

-Neil

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